Official Paper

RRB JE CBT 2 (Mechanical and Allied Engineering) Official Paper (Held On: 2 Jul, 2026) (Previous Year Paper)

150 questions · 120 minutes · with answers · free

Attempt as Timed Mock Test

General Abilities (50 questions)

1

Which condition is required for a displacement reaction between a metal and salt solution?

  1. ((a))

    Metal must be same as salt constituent

  2. ((b))

    Metal must be higher in reactivity series

  3. ((c))

    Reaction must be endothermic

  4. ((d))

    Salt must be insoluble in water

Show Answer
Answer: ((a))

Metal must be same as salt constituent

2

According to the Article 75 of the Indian Constitution, the total number of ministers (including the Prime Minister) in the Council of Ministers shall NOT exceed what percentage of the total members of the House of the People, i.e., Lok Sabha?

  1. ((a))

    25%

  2. ((b))

    20%

  3. ((c))

    15%

  4. ((d))

    10%

Show Answer
Answer: ((a))

25%

3

A construction worker needs to lift a heavy metal beam using a lever but has a limited length of plank. Which adjustment would allow the worker to lift the beam with the least effort if the position of the fulcrum can be changed but the plank length remains constant?

  1. ((a))

    Keep the fulcrum fixed at any point

  2. ((b))

    Move the fulcrum closer to the beam

  3. ((c))

    Place the fulcrum at the center of the plank

  4. ((d))

    Move the fulcrum closer to the worker

Show Answer
Answer: ((a))

Keep the fulcrum fixed at any point

4

What file extension is used to save an MS PowerPoint 2021 presentation?

  1. ((a))

    .docx

  2. ((b))

    .xlsx

  3. ((c))

    .pdf

  4. ((d))

    .pptx

Show Answer
Answer: ((a))

.docx

5

According to Thomson’s model, how are electrons arranged in an atom?

  1. ((a))

    Randomly placed inside the nucleus

  2. ((b))

    Orbiting around neutrons in elliptical paths

  3. ((c))

    Embedded in a positively charged sphere like seeds in a watermelon

  4. ((d))

    Moving in fixed orbits around the nucleus

Show Answer
Answer: ((a))

Randomly placed inside the nucleus

6

A student pushes a heavy box that is already moving across a rough floor. If the force applied by the student is exactly equal to the frictional force opposing the motion, what will happen to the box?

  1. ((a))

    The box will move at a constant speed

  2. ((b))

    The box will move at increasing speed

  3. ((c))

    The box will gradually come to rest

  4. ((d))

    The box will accelerate forward

Show Answer
Answer: ((a))

The box will move at a constant speed

7

What is the main reason sulfur dioxide irritates the upper respiratory mucous membrane?

  1. ((a))

    It dissolves in moisture in upper respiratory tract and forms irritant

  2. ((b))

    It combines with other pollutants and polymerizes in the lungs

  3. ((c))

    It combines with haemoglobin and effect the oxygen transport

  4. ((d))

    It oxidizes to sulphur trioxide and inhaled deep into lung

Show Answer
Answer: ((a))

It dissolves in moisture in upper respiratory tract and forms irritant

8

Which type of computer virus attaches itself to executable files and gets activated when the file is run?

  1. ((a))

    Worm

  2. ((b))

    Macro Virus

  3. ((c))

    Boot Sector Virus

  4. ((d))

    File Infector Virus

Show Answer
Answer: ((a))

Worm

9

Which of the following statements is true about the Outbox?

  1. ((a))

    It is used to receive incoming emails.

  2. ((b))

    It contains emails that are currently being drafted.

  3. ((c))

    It temporarily stores emails that are queued for sending.

  4. ((d))

    It holds emails that have been successfully sent.

Show Answer
Answer: ((a))

It is used to receive incoming emails.

10

Which experimental discovery contradicted Thomson's model of the atom and led to its rejection?

  1. ((a))

    Discovery of the neutron by James Chadwick

  2. ((b))

    Alpha particle scattering showing deflection at large angles

  3. ((c))

    Measurement of atomic radius using X-ray diffraction

  4. ((d))

    Observation of line spectra of hydrogen by Bohr

Show Answer
Answer: ((a))

Discovery of the neutron by James Chadwick

11

If cell A1 = 10 and B1 = 20, what will =A1+B1 return?

  1. ((a))

    200

  2. ((b))

    30

  3. ((c))

    Error

  4. ((d))

    1020

Show Answer
Answer: ((a))

200

12

In a real-life scenario, a chemist discovers a compound with the formula CH3CH2CH(CH3)CH2CH2OH. What is the correct IUPAC name for this compound?

  1. ((a))

    3-methylhexanol

  2. ((b))

    4-methylpentanol

  3. ((c))

    3-methylpentan-1-ol

  4. ((d))

    2-methylhexanol

Show Answer
Answer: ((a))

3-methylhexanol

13

Which pair of sectors is commonly addressed together in State Action Plan on Climate Change (SAPCC) adaptation planning?

  1. ((a))

    Heavy industry and entertainment

  2. ((b))

    Information technology and space research

  3. ((c))

    Textile design and fashion marketing

  4. ((d))

    Water resources and health systems

Show Answer
Answer: ((a))

Heavy industry and entertainment

14

The Atal Bhujal Yojana 2020 focused on improving water resources management of how many states?

  1. ((a))

    eight

  2. ((b))

    ten

  3. ((c))

    five

  4. ((d))

    seven

Show Answer
Answer: ((a))

eight

15

Who won the maximum number of medals at the 38th National Games of India?

  1. ((a))

    Manu Bhaker

  2. ((b))

    Neeraj Chopra

  3. ((c))

    Bajrang Punia

  4. ((d))

    Dhinidhi Desinghu

Show Answer
Answer: ((a))

Manu Bhaker

16

Which of the following best describes how sound travels through air?

  1. ((a))

    The air particles vibrate up and down perpendicular to the direction of the wave

  2. ((b))

    The air particles move in circular paths as the wave passes

  3. ((c))

    The air particles remain stationary while the wave moves through

  4. ((d))

    The air particles vibrate back and forth parallel to the direction of the wave

Show Answer
Answer: ((a))

The air particles vibrate up and down perpendicular to the direction of the wave

17

Which of the following Articles states about the right of individual to form associations or unions or co-operative societies?

  1. ((a))

    Article 19 (1) (c)

  2. ((b))

    Article 19 (1) (b)

  3. ((c))

    Article 19 (1) (a)

  4. ((d))

    Article 19 (1) (d)

Show Answer
Answer: ((a))

Article 19 (1) (c)

18

The primary method of managing biodegradable domestic waste after collection is _________________.

  1. ((a))

    burnt in open air

  2. ((b))

    conversion into compost

  3. ((c))

    sending for recycling

  4. ((d))

    throwing into sewers

Show Answer
Answer: ((a))

burnt in open air

19

Which Quick Style type is applied only to selected words or individual characters within a paragraph in MS Word 2010?

  1. ((a))

    Character styles

  2. ((b))

    Paragraph styles

  3. ((c))

    Page styles

  4. ((d))

    Linked styles

Show Answer
Answer: ((a))

Character styles

20

If 10 grams of salt are dissolved in 100 mL of water, which component is the solute?

  1. ((a))

    Neither

  2. ((b))

    Salt only

  3. ((c))

    Water only

  4. ((d))

    Both salt and water

Show Answer
Answer: ((a))

Neither

21

The pollutant group commonly associated with oil spills in oceans is ______________.

  1. ((a))

    synthetic detergents

  2. ((b))

    petroleum products

  3. ((c))

    agricultural pesticides

  4. ((d))

    chemical fertilizers

Show Answer
Answer: ((a))

synthetic detergents

22

Which of the following best describes the velocity-time graph for an object moving with uniform velocity?

  1. ((a))

    A straight horizontal line parallel to the time axis

  2. ((b))

    A curved line above the time axis

  3. ((c))

    A straight line sloping upwards from the time axis

  4. ((d))

    A line starting from the origin and sloping upwards

Show Answer
Answer: ((a))

A straight horizontal line parallel to the time axis

23

A student accidentally spills some hydrochloric acid on a table. Which substance should be used to neutralise the acid safely?

  1. ((a))

    Lemon juice

  2. ((b))

    Baking soda solution

  3. ((c))

    Sugar solution

  4. ((d))

    Vinegar

Show Answer
Answer: ((a))

Lemon juice

24

The atmospheric component that remains largely unreactive is _____________.

  1. ((a))

    Carbon dioxide

  2. ((b))

    Methane

  3. ((c))

    Oxygen

  4. ((d))

    Argon

Show Answer
Answer: ((a))

Carbon dioxide

25

Which of the following satellites was launched on November 2, 2025, to enhance the Indian Navy’s secure communication network and maritime surveillance capabilities?

  1. ((a))

    RISAT-2B

  2. ((b))

    GSAT-6A

  3. ((c))

    CMS-03 (GSAT-7R)

  4. ((d))

    Cartosat-3

Show Answer
Answer: ((a))

RISAT-2B

26

Which of the following rivers forms a delta along the eastern coastal plains?

  1. ((a))

    Tapi

  2. ((b))

    Narmada

  3. ((c))

    Godavari

  4. ((d))

    Ganga

Show Answer
Answer: ((a))

Tapi

27

Which new warship was commissioned by the Indian Navy in November, 2025, to strengthen anti-submarine and coastal defence capabilities?

  1. ((a))

    INS Vikrant

  2. ((b))

    INS Mahe

  3. ((c))

    INS Ikshak

  4. ((d))

    INS Arnala

Show Answer
Answer: ((a))

INS Vikrant

28

The primary goal of the Pradhan Mantri Gram Sadak Yojana (PMGSY) is to:

  1. ((a))

    Develop urban infrastructure

  2. ((b))

    Provide rural connectivity through road construction

  3. ((c))

    Enhance telecommunication services in cities

  4. ((d))

    Promote renewable energy usage

Show Answer
Answer: ((a))

Develop urban infrastructure

29

Which of the following is/are the primary reasons to fall in the trap of Email fraud or phishing?
A) Paying attention to lucrative offers.
B) Not checking on links or attachments from unknown senders
C) Providing official information via email
D) Paying attention to the company logo sent in the email

  1. ((a))

    A, B Only

  2. ((b))

    A, B, D Only

  3. ((c))

    A, B, C Only

  4. ((d))

    A only

Show Answer
Answer: ((a))

A, B Only

30

The Kol Rebellion (1831–32) mainly affected which plateau region?

  1. ((a))

    Meghalaya Plateau

  2. ((b))

    Deccan Plateau

  3. ((c))

    Malwa Plateau

  4. ((d))

    Chotanagpur Plateau

Show Answer
Answer: ((a))

Meghalaya Plateau

31

A farmer applies large amounts of chemical fertilizers over several years. Which consequence most likely results from this practice leading to soil pollution?

  1. ((a))

    Erosion of surface soil layers

  2. ((b))

    Faster plant growth every season

  3. ((c))

    Increase in earthworm population

  4. ((d))

    Accumulation of toxic substances in soil

Show Answer
Answer: ((a))

Erosion of surface soil layers

32

Which British colonial building in Mumbai, completed in 1888, showcases a blend of Victorian Gothic and Indian architectural elements?

  1. ((a))

    Chhatrapati Shivaji Maharaj Terminus

  2. ((b))

    Gateway of India

  3. ((c))

    Rajabai Clock Tower

  4. ((d))

    Bombay Town Hall

Show Answer
Answer: ((a))

Chhatrapati Shivaji Maharaj Terminus

33

Which of the following statements best describes the behavior of magnetic field lines around a straight current-carrying conductor?

  1. ((a))

    They change direction randomly along the wire.

  2. ((b))

    They radiate straight outward from the wire.

  3. ((c))

    They form concentric circles centered on the conductor.

  4. ((d))

    They are parallel straight lines along the wire.

Show Answer
Answer: ((a))

They change direction randomly along the wire.

34

Consider the following statements regarding chemical reactions and choose the correct option.

Statement I: Every reaction in which two or more reactants combine to form a single product is classified as a combination reaction regardless of heat change.

Statement II: The reaction CaO(s) + H2O(l) → Ca(OH)2(aq) + heat is both a combination reaction and an exothermic reaction.

  1. ((a))

    Both statements are incorrect

  2. ((b))

    Both statements are correct

  3. ((c))

    Only Statement II is correct

  4. ((d))

    Only Statement I is correct

Show Answer
Answer: ((a))

Both statements are incorrect

35

How can we locate a file with a known extension but an unknown name in a large directory?

  1. ((a))

    Using the dir command

  2. ((b))

    Using the Search box in File Explorer with *.ext

  3. ((c))

    Checking the Recycle Bin

  4. ((d))

    Through File Explorer

Show Answer
Answer: ((a))

Using the dir command

36

When was the 11th National Handloom Day celebrated across India under the coordination of the Ministry of Textiles?

  1. ((a))

    September 7, 2025

  2. ((b))

    November 7, 2025

  3. ((c))

    August 7, 2025

  4. ((d))

    October 7, 2025

Show Answer
Answer: ((a))

September 7, 2025

37

Which function returns the smallest value?

  1. ((a))

    AVERAGE

  2. ((b))

    COUNT()

  3. ((c))

    MAX()

  4. ((d))

    MIN()

Show Answer
Answer: ((a))

AVERAGE

38

A field exposed to excessive pesticide use shows a sharp decline in earthworm population. The resulting effect on soil is:

  1. ((a))

    Reduced soil fertility

  2. ((b))

    Enhanced decomposition

  3. ((c))

    Increased water retention

  4. ((d))

    Improved aeration

Show Answer
Answer: ((a))

Reduced soil fertility

39

Which of the following statements best describes how the power of accommodation enables the human eye to focus on both near and distant objects?

  1. ((a))

    The cornea provides all the focusing power required for clear vision

  2. ((b))

    The eye lens changes its focal length by altering its shape through ciliary muscle action

  3. ((c))

    The iris controls the amount of light entering and helps to focus

  4. ((d))

    The retina moves forward and backward to adjust the focus

Show Answer
Answer: ((a))

The cornea provides all the focusing power required for clear vision

40

On which date is National Handloom Day observed in India?

  1. ((a))

    2 October

  2. ((b))

    18 August

  3. ((c))

    5 September

  4. ((d))

    7 August

Show Answer
Answer: ((a))

2 October

41

What is the general formula of alkenes?

  1. ((a))

    CnHn

  2. ((b))

    CnH2n−2

  3. ((c))

    CnH2n

  4. ((d))

    CnH2n+2

Show Answer
Answer: ((a))

CnHn

42

Which of the following options must be DISABLED before manually setting the date and time in Windows?

  1. ((a))

    Enable multiple clocks

  2. ((b))

    Set time automatically

  3. ((c))

    Night Light

  4. ((d))

    Set time zone globally

Show Answer
Answer: ((a))

Enable multiple clocks

43

The Mappila Uprisings of the 19th century occurred mainly in which region of India?

  1. ((a))

    Malabar region of Kerala

  2. ((b))

    Coromandel Coast of Tamil Nadu

  3. ((c))

    Sunderbans region of West Bengal

  4. ((d))

    Konkan region of Maharashtra

Show Answer
Answer: ((a))

Malabar region of Kerala

44

Biomedical waste handlers in a hospital are at risk of occupational hazards. The most effective way to protect them from exposure to infectious materials is:

  1. ((a))

    Segregation of waste into color-coded bins

  2. ((b))

    Use of protective equipment and safe handling

  3. ((c))

    Vaccination against common infections

  4. ((d))

    Regular medical check-ups

Show Answer
Answer: ((a))

Segregation of waste into color-coded bins

45

Which of the following is a primary mission under India's National Action Plan on Climate Change (NAPCC)?

  1. ((a))

    National Nutrition Mission

  2. ((b))

    National Solar Mission

  3. ((c))

    National Rural Livelihood Mission

  4. ((d))

    National Highway Development Project

Show Answer
Answer: ((a))

National Nutrition Mission

46

The term 'smog' is a combination of ____________.

  1. ((a))

    Fog and clouds

  2. ((b))

    Smoke and haze

  3. ((c))

    Smoke and fog

  4. ((d))

    Smog and mist

Show Answer
Answer: ((a))

Fog and clouds

47

Match the following columns.

Pardoning powerFunction
1. Commutationa. Removes both sentence and the conviction.
2. Reprieveb. Lesser sentence than originally given, in special cases.
3. Respitec. Reducing the period of sentence without changing the character of the sentence.
4. Remissiond. Temporary stay on the execution of a sentence.
5. Pardone. Substitution of one form of punishment to a lighter one.
  1. ((a))

    1-e, 2-d, 3-b, 4-c, 5-a

  2. ((b))

    1-c, 2-e, 3-b, 4-a, 5-d

  3. ((c))

    1-d, 2-b, 3-e, 4-c, 5-a

  4. ((d))

    1-a, 2-c, 3-d, 4-e, 5-b

Show Answer
Answer: ((a))

1-e, 2-d, 3-b, 4-c, 5-a

48

Which of the following indicators is NOT typically used to measure sustainable development?

  1. ((a))

    Human Development Index (HDI)

  2. ((b))

    Gross Domestic Product (GDP) growth rate

  3. ((c))

    Biocapacity

  4. ((d))

    Ecological Footprint

Show Answer
Answer: ((a))

Human Development Index (HDI)

49

A factory plans to install a powerful electromagnet for lifting metal scraps. To maximize the magnetic field strength around the coil, which of the following combinations would be most effective?

  1. ((a))

    Using a copper core, increasing coil turns, and lowering current

  2. ((b))

    Using an air core, decreasing coil turns, and keeping current constant

  3. ((c))

    Using a steel core, decreasing coil turns, and lowering current

  4. ((d))

    Using a soft iron core, increasing coil turns, and increasing current through the coil

Show Answer
Answer: ((a))

Using a copper core, increasing coil turns, and lowering current

50

You want to automatically advance slides with narration and animations during a presentation. Which MS PowerPoint feature should you use to achieve this?

  1. ((a))

    Action Buttons

  2. ((b))

    Slide Sorter

  3. ((c))

    Rehearse Timings

  4. ((d))

    Presenter View

Show Answer
Answer: ((a))

Action Buttons

Technical Abilities (100 questions)

51

The point of contraflexure occurs where _____.

  1. ((a))

    Load intensity is zero

  2. ((b))

    Bending moment changes sign

  3. ((c))

    Bending moment is maximum

  4. ((d))

    Shear force is zero

Show Answer
Answer: ((a))

Load intensity is zero

52

What is the main chemical change that occurs on the metal surface during anodizing?

  1. ((a))

    Removal of the oxide layer

  2. ((b))

    Formation of a thick oxide layer

  3. ((c))

    Deposition of metallic ions

  4. ((d))

    Dissolving the metal away

Show Answer
Answer: ((a))

Removal of the oxide layer

53

Which property of rubber-based coatings makes them suitable for protecting steel pipes in industrial environments?

  1. ((a))

    The coating provides high levels of thermal conductivity for the pipes

  2. ((b))

    The coating's flexibility prevents cracking under vibration and resists chemical attack

  3. ((c))

    The coating's color remains durable even with prolonged sunlight exposure

  4. ((d))

    The coating improves the electrical conductivity of the pipe surface

Show Answer
Answer: ((a))

The coating provides high levels of thermal conductivity for the pipes

54

The maximum bending moment for a simply supported beam of span L with uniformly distributed load (UDL) w per unit length is _____.

  1. ((a))

    WL212\frac{WL^2}{12}

  2. ((b))

    WL22\frac{WL^2}{2}

  3. ((c))

    WL216\frac{WL^2}{16}

  4. ((d))

    WL28\frac{WL^2}{8}

Show Answer
Answer: ((a))

WL212\frac{WL^2}{12}

55

Which of the following is an example of a positive displacement air compressor?

  1. ((a))

    Axial flow compressor

  2. ((b))

    Radial dynamic compressor

  3. ((c))

    Centrifugal compressor

  4. ((d))

    Reciprocating piston compressor

Show Answer
Answer: ((a))

Axial flow compressor

56

Which of the following is not a type of friction?

  1. ((a))

    Rolling friction

  2. ((b))

    Kinetic friction

  3. ((c))

    Gravitational friction

  4. ((d))

    Static friction

Show Answer
Answer: ((a))

Rolling friction

57

The saddle of a lathe carriage:

  1. ((a))

    Controls spindle speed automatically

  2. ((b))

    Moves the lead screw mechanism

  3. ((c))

    Rotates the workpiece against tool

  4. ((d))

    Supports the cross-slide and tool post

Show Answer
Answer: ((a))

Controls spindle speed automatically

58

The lathe bed is designed with which type of guideways?

  1. ((a))

    Triangular

  2. ((b))

    Inverted V and flat combination

  3. ((c))

    Rectangular

  4. ((d))

    Circular

Show Answer
Answer: ((a))

Triangular

59

A component in a high-impact environment requires resistance to fracture with minimal deformation. Which material property would be most critical to avoid premature failure?

  1. ((a))

    Low brittleness with low stiffness

  2. ((b))

    High brittleness with high elasticity

  3. ((c))

    High brittleness with low ductility

  4. ((d))

    Low brittleness with high toughness

Show Answer
Answer: ((a))

Low brittleness with low stiffness

60

For drilling a hole on a lathe, the drilling tool is placed in the ______.

  1. ((a))

    carriage

  2. ((b))

    tool post

  3. ((c))

    tailstock

  4. ((d))

    chuck

Show Answer
Answer: ((a))

carriage

61

Which type of friction occurs when surfaces are lubricated with a fluid?

  1. ((a))

    Rolling friction

  2. ((b))

    Film friction

  3. ((c))

    Static friction

  4. ((d))

    Dry friction

Show Answer
Answer: ((a))

Rolling friction

62

Why is a steady rest sometimes used in cylindrical grinding?

  1. ((a))

    To cool the workpiece during grinding

  2. ((b))

    To align the grinding wheel to the table

  3. ((c))

    To support long workpieces during rotation

  4. ((d))

    To hold abrasive materials for grinding

Show Answer
Answer: ((a))

To cool the workpiece during grinding

63

Which defect is most likely to result from excessive carburizing time in steel heat treatment?

  1. ((a))

    Development of coarse pearlite across the section

  2. ((b))

    Initiation of intergranular corrosion in the core

  3. ((c))

    Formation of excessive retained austenite at the surface

  4. ((d))

    Increase in porosity throughout the component

Show Answer
Answer: ((a))

Development of coarse pearlite across the section

64

Trackless cranes are mainly used for:

  1. ((a))

    Continuous material transport

  2. ((b))

    Lifting loads in confined or uneven areas

  3. ((c))

    Operations limited to fixed tracks

  4. ((d))

    Handling liquid materials only

Show Answer
Answer: ((a))

Continuous material transport

65

Radial flow pumps are preferred when:

  1. ((a))

    High flow, low head is required

  2. ((b))

    Only low suction head is available

  3. ((c))

    Low flow, high head is required

  4. ((d))

    Flow is very viscous

Show Answer
Answer: ((a))

High flow, low head is required

66

For a small spherical droplet of liquid with surface tension σ and diameter d, which of the following correctly expresses the pressure intensity inside the droplet p due to surface tension?

  1. ((a))

    p=6σd p = \frac{6\sigma}{d}

  2. ((b))

    p=4σdp = \frac{4\sigma}{d}

  3. ((c))

    p=σdp = \frac{\sigma}{d}

  4. ((d))

    p=2σd p = \frac{2\sigma}{d}

Show Answer
Answer: ((a))

p=6σd p = \frac{6\sigma}{d}

67

An LVDT (Linear Variable Differential Transformer) is primarily used in which type of comparator?

  1. ((a))

    Pneumatic comparator

  2. ((b))

    Optical comparator

  3. ((c))

    Mechanical comparator

  4. ((d))

    Electrical comparator

Show Answer
Answer: ((a))

Pneumatic comparator

68

For shafts designed to transmit the same torque, which statement is generally true when comparing a solid shaft to a hollow shaft of the same material and outer diameter?

  1. ((a))

    Both shafts have equal torsional stiffness and equal weight.

  2. ((b))

    The hollow shaft has a lower torsional stiffness but lower weight.

  3. ((c))

    The solid shaft has a higher torsional stiffness and lower weight.

  4. ((d))

    The hollow shaft has a higher torsional stiffness and higher weight.

Show Answer
Answer: ((a))

Both shafts have equal torsional stiffness and equal weight.

69

In a workshop, why might a lever-operated hoist be preferred over an electric hoist for certain applications?

  1. ((a))

    Portability and suitability for short, manual lifting operations

  2. ((b))

    Continuous operation and automatic overload protection

  3. ((c))

    Lower initial cost and larger load lifting capacity

  4. ((d))

    High lifting speed and remote control capabilities

Show Answer
Answer: ((a))

Portability and suitability for short, manual lifting operations

70

For a simply supported beam with multiple point loads, maximum bending moment occurs where:

  1. ((a))

    Reaction = 0

  2. ((b))

    Load = 0

  3. ((c))

    Deflection = 0

  4. ((d))

    Shear force = 0

Show Answer
Answer: ((a))

Reaction = 0

71

Which material handling equipment would be most suitable for transferring bulk granular materials over a long horizontal distance within a factory?

  1. ((a))

    Belt conveyor system

  2. ((b))

    Pallet truck operation

  3. ((c))

    Forklift transportation

  4. ((d))

    Overhead crane arrangement

Show Answer
Answer: ((a))

Belt conveyor system

72

Why is facing operation critical for assembly parts?

  1. ((a))

    It improves the cutting tool life during machining operation.

  2. ((b))

    It increases the overall strength of the workpiece material.

  3. ((c))

    It ensures the end surface is flat and perpendicular to the axis.

  4. ((d))

    It reduces the hardness of the material at the surface region.

Show Answer
Answer: ((a))

It improves the cutting tool life during machining operation.

73

What is the role of the acute angle attachment in a Bevel Protractor?

  1. ((a))

    To measure linear distances

  2. ((b))

    To measure acute angles less than 90°

  3. ((c))

    To adjust the stock

  4. ((d))

    To lock the vernier scale

Show Answer
Answer: ((a))

To measure linear distances

74

The type of surface produced by a taper turning operation performed on a lathe machine is:

  1. ((a))

    curved one

  2. ((b))

    conical

  3. ((c))

    cylindrical

  4. ((d))

    flat

Show Answer
Answer: ((a))

curved one

75

A cylindrical steel rod with a diameter of 20 mm is subjected to a tensile load of 40 kN. The material has a yield strength of 450 MPa. Assuming the deformation remains within the elastic limit, calculate the factor of safety based on the ultimate tensile strength and the yield strength. If the modulus of elasticity of the steel is 200 GPa, determine the elongation of the rod over a length of 500 mm under this load. Which of the following options correctly represents the factor of safety based on yield strength and the elongation?

  1. ((a))

    Factor of Safety (Yield) = 2.25, Elongation = 0.318 mm

  2. ((b))

    Factor of Safety (Yield) = 3.58, Elongation = 0.318 mm

  3. ((c))

    Factor of Safety (Yield) = 3.58, Elongation = 0.8 mm

  4. ((d))

    Factor of Safety (Yield) = 2.25, Elongation = 0.5 mm

Show Answer
Answer: ((a))

Factor of Safety (Yield) = 2.25, Elongation = 0.318 mm

76

A synthetic oil is contained in an accelerating elevator moving upward with acceleration (a). If the pressure intensity at the free surface is atmospheric, the intensity of pressure at a depth (h) below the surface is [take (g) as the acceleration due to gravity]:

  1. ((a))

    Patm + ρgh

  2. ((b))

    Patm - ρ(g−a)h

  3. ((c))

    Patm + ρ(g+a)h

  4. ((d))

    Patm - ρgh

Show Answer
Answer: ((a))

Patm + ρgh

77

The shape of the bending moment diagram for a cantilever beam subjected to a uniformly distributed load (UDL) over the whole length is _____.

  1. ((a))

    Rectangular

  2. ((b))

    Triangular

  3. ((c))

    Trapezoidal

  4. ((d))

    Parabolic

Show Answer
Answer: ((a))

Rectangular

78

Which of the following best defines the specific weight of a fluid?

  1. ((a))

    The weight of fluid per unit mass

  2. ((b))

    The weight of fluid per unit pressure

  3. ((c))

    The weight of fluid per unit volume

  4. ((d))

    The weight of fluid per unit force

Show Answer
Answer: ((a))

The weight of fluid per unit mass

79

During the 'Shaping' operation conducted on a workpiece of aluminum material, the type of coolant used is:

  1. ((a))

    mineral hard oil

  2. ((b))

    kerosene

  3. ((c))

    dry kerosene turpentine

  4. ((d))

    cutting compound

Show Answer
Answer: ((a))

mineral hard oil

80

Intensity of pressure at a point in a fluid is:

  1. ((a))

    Pressure at a point varies significantly with direction even in a static fluid

  2. ((b))

    Total normal force acting uniformly over a surface, independent of area and location within the fluid

  3. ((c))

    Pressure includes both normal and shear stresses acting simultaneously at a point

  4. ((d))

    Normal force per unit area at a point in the fluid, scalar intensity independent of direction

Show Answer
Answer: ((a))

Pressure at a point varies significantly with direction even in a static fluid

81

Mild steel shows poor corrosion resistance mainly because it:

  1. ((a))

    Does not contain protective elements like chromium or nickel

  2. ((b))

    Possesses a non-uniform and less stable microstructure

  3. ((c))

    Forms a dense but non-protective oxide layer on the surface

  4. ((d))

    Contains a relatively high amount of carbon

Show Answer
Answer: ((a))

Does not contain protective elements like chromium or nickel

82

In high-performance applications such as turbine shafts and precision gears, alloy steels are favored over mild steels primarily because they:

  1. ((a))

    Require less alloying and heat treatment to achieve desired strength

  2. ((b))

    Possess lower density and improved dimensional stability

  3. ((c))

    Retain mechanical integrity and hardness under conditions of elevated temperature and cyclic stress

  4. ((d))

    Exhibit superior machinability due to refined ferritic microstructure

Show Answer
Answer: ((a))

Require less alloying and heat treatment to achieve desired strength

83

What type of efficiency is most important for an axial flow compressor in high-speed applications?

  1. ((a))

    Mechanical efficiency

  2. ((b))

    Isentropic efficiency

  3. ((c))

    Volumetric efficiency

  4. ((d))

    Thermal efficiency

Show Answer
Answer: ((a))

Mechanical efficiency

84

The functioning of a comparator is based on:

  1. ((a))

    The use of limit gauges

  2. ((b))

    Comparison with a known standard, such as slip gauges

  3. ((c))

    An optical measuring system

  4. ((d))

    The use of an accurately calibrated scale

Show Answer
Answer: ((a))

The use of limit gauges

85

The horizontal and vertical components of a 100 N force inclined at 37° with the horizontal are: (consider the approximation of sin 37°=0.6, cos 37°=0.8 and tan 37°=0.75)

  1. ((a))

    100 N and 0 N

  2. ((b))

    60 N and 80 N

  3. ((c))

    80 N and 60 N

  4. ((d))

    70 N and 70 N

Show Answer
Answer: ((a))

100 N and 0 N

86

A company faces an annual demand of 10,000 units, a fixed ordering cost of ₹200 per order, and a holding cost of ₹4 per unit per year. What is the EOQ for this company?

  1. ((a))

    The EOQ is 4000 units

  2. ((b))

    The EOQ is 2240 units

  3. ((c))

    The EOQ is 1000 units

  4. ((d))

    The EOQ is 5000 units

Show Answer
Answer: ((a))

The EOQ is 4000 units

87

The ideal gas law for isothermal process can be represented as ______, (P is the pressure and V is the volume of the gas at any stage).

  1. ((a))

    P/V = Constant.

  2. ((b))

    V = constant.

  3. ((c))

    PV = Constant.

  4. ((d))

    P = constant.

Show Answer
Answer: ((a))

P/V = Constant.

88

You must inspect a welded aluminum structure for both surface and internal defects with minimal health risk to operators. Which combination of tests is most appropriate?

  1. ((a))

    Dye penetrant and ultrasonic testing

  2. ((b))

    Radiographic and magnetic particle testing

  3. ((c))

    Radiographic and ultrasonic testing

  4. ((d))

    Visual and magnetic particle testing

Show Answer
Answer: ((a))

Dye penetrant and ultrasonic testing

89

The primary function of a sine bar is to:

  1. ((a))

    check thread pitches

  2. ((b))

    calibrate pressure gauges

  3. ((c))

    measure angles with high accuracy

  4. ((d))

    measure linear dimensions

Show Answer
Answer: ((a))

check thread pitches

90

How do the gear mechanism and braking system in a hoist contribute to safe lifting operations?

  1. ((a))

    The gear mechanism reduces speed while the brake system holds the load steady

  2. ((b))

    Both gear mechanism and brake system work only during lowering of load

  3. ((c))

    The brake system increases speed and the gear mechanism holds the load steady

  4. ((d))

    The gear mechanism increases speed and the brake system adds force to lifting

Show Answer
Answer: ((a))

The gear mechanism reduces speed while the brake system holds the load steady

91

___________ is used to measure the pressure difference in a Venturi meter.

  1. ((a))

    Pitot tube

  2. ((b))

    Manometer

  3. ((c))

    Bourdon gauge

  4. ((d))

    Rotameter

Show Answer
Answer: ((a))

Pitot tube

92

Which of the following is a primary application of interferometry in metrology?

  1. ((a))

    Calculating torque in shafts using sensors

  2. ((b))

    Determining chemical composition by spectroscopy

  3. ((c))

    Measuring surface flatness with high precision

  4. ((d))

    Analyzing thermal conductivity of metals

Show Answer
Answer: ((a))

Calculating torque in shafts using sensors

93

Corrosion resistance of alloy steels can be increased further by:

  1. ((a))

    Increasing the overall carbon content in the alloy

  2. ((b))

    Adding a small percentage of copper to the composition

  3. ((c))

    Improving surface finish through mechanical polishing

  4. ((d))

    Using protective coatings or chemical passivation treatment

Show Answer
Answer: ((a))

Increasing the overall carbon content in the alloy

94

Which of the following best describes the principle of parkerising?

  1. ((a))

    A phosphate layer forms by chemical reaction

  2. ((b))

    Surface roughness is increased mechanically

  3. ((c))

    A paint coating is applied to the surface

  4. ((d))

    A polymer coating is sprayed on the surface

Show Answer
Answer: ((a))

A phosphate layer forms by chemical reaction

95

Which two types of thermodynamic processes constitute the Carnot cycle in an ideal heat engine?

  1. ((a))

    Adiabatic and isochoric

  2. ((b))

    Isobaric and isochoric

  3. ((c))

    Isothermal and adiabatic

  4. ((d))

    Isothermal and isochoric

Show Answer
Answer: ((a))

Adiabatic and isochoric

96

A hollow shaft has an outer diameter twice its inner diameter of a solid shaft, both constructed from the same material, and having identical outer diameters. The ratio of their torsional strength is:

  1. ((a))

    1516\frac{15}{16}

  2. ((b))

    59\frac{5}{9}

  3. ((c))

    1314\frac{13}{14}

  4. ((d))

    23\frac{2}{3}

Show Answer
Answer: ((a))

1516\frac{15}{16}

97

Determine the gauge pressure given an absolute pressure of 2 atm and atmospheric pressure of 1 atm.

  1. ((a))

    0.5 atm

  2. ((b))

    1 atm

  3. ((c))

    2 atm

  4. ((d))

    3 atm

Show Answer
Answer: ((a))

0.5 atm

98

A company manufactures a component at a variable cost of ₹40 per unit and incurs a fixed cost of ₹2,00,000 per year. An outside supplier offers the same component at ₹60 per unit. What should the company do if the annual demand is 12,000 units?

  1. ((a))

    Continue manufacturing the component in-house as it is more cost-effective

  2. ((b))

    Split production equally between manufacturing and outsourcing

  3. ((c))

    Outsource production to the supplier as it saves more money

  4. ((d))

    Reduce production and buy the remaining units from the supplier

Show Answer
Answer: ((a))

Continue manufacturing the component in-house as it is more cost-effective

99

Which type of flux is most suitable for minimizing oxidation in high-temperature aluminum welding applications involving magnesium alloys?

  1. ((a))

    Rosin-based flux

  2. ((b))

    Fluoride-based flux

  3. ((c))

    Zinc chloride-based flux

  4. ((d))

    Borax-based flux

Show Answer
Answer: ((a))

Rosin-based flux

100

Why is water mixed with oil often preferred as a grinding coolant over plain water?

  1. ((a))

    It provides both cooling and lubrication

  2. ((b))

    It makes coolant less effective

  3. ((c))

    It increases corrosion of metals

  4. ((d))

    It decreases grinding time significantly

Show Answer
Answer: ((a))

It provides both cooling and lubrication

101

A hollow shaft is designed to transmit a torque of 40000 N-m. The polar moment of inertia (J) is 0.004 m4. The ratio of inside diameter to outside diameter of the hollow shaft (Di/Do) is 0.8. The inside diameter is 400 mm. What is the maximum induced shear stress (tmax) at the outer fiber of the shaft?

  1. ((a))

    0.25 MPa

  2. ((b))

    2.5 MPa

  3. ((c))

    2500 MPa

  4. ((d))

    250 MPa

Show Answer
Answer: ((a))

0.25 MPa

102

Which of the following can be measured using interferometry?

  1. ((a))

    Surface roughness

  2. ((b))

    Depth of micro‑grooves

  3. ((c))

    Frequency of vibration

  4. ((d))

    Linear displacement

Show Answer
Answer: ((a))

Surface roughness

103

What is the heat supplied to a Carnot engine that produces 100 kW of useful work at an efficiency of 35%?

  1. ((a))

    300 kW

  2. ((b))

    285.7 kW

  3. ((c))

    150 kW

  4. ((d))

    200 kW

Show Answer
Answer: ((a))

300 kW

104

With an increase in angle of the inclined surface, the maximum angle at which a body starts sliding down the plane is called ___________.

  1. ((a))

    limiting friction

  2. ((b))

    Static friction

  3. ((c))

    angle of friction

  4. ((d))

    cone angle

Show Answer
Answer: ((a))

limiting friction

105

A technician wants to improve flatness and surface quality of a gauge block using lapping. What is the most important factor to control?

  1. ((a))

    High temperature and fast lap speed

  2. ((b))

    Applying excessive force to speed up lapping

  3. ((c))

    Uniform pressure and movement across the surface

  4. ((d))

    Using coarse abrasives for faster removal

Show Answer
Answer: ((a))

High temperature and fast lap speed

106

If the electrolyte does not contain metal ions of the plating metal, what is the most likely outcome?

  1. ((a))

    The anode will become coated with metal

  2. ((b))

    No metal will deposit on the cathode

  3. ((c))

    The cathode will dissolve in the solution

  4. ((d))

    The process will create a thick oxide layer

Show Answer
Answer: ((a))

The anode will become coated with metal

107

Why is direct current (DC) commonly used in MIG (metal inert gas) welding?

  1. ((a))

    It reduces penetration for thick materials

  2. ((b))

    It increases spatter for faster welding

  3. ((c))

    It limits the types of metals that can be welded

  4. ((d))

    It offers a stable arc and consistent metal transfer

Show Answer
Answer: ((a))

It reduces penetration for thick materials

108

Which of the following best describes the function of a hoist in material handling systems?

  1. ((a))

    Lifting and lowering loads vertically with controlled movement

  2. ((b))

    Rotating loads for alignment during material handling

  3. ((c))

    Moving loads horizontally between different workstations

  4. ((d))

    Sorting materials by size during material handling

Show Answer
Answer: ((a))

Lifting and lowering loads vertically with controlled movement

109

Which manufacturing method is primarily used to harden and set silicate-bonded grinding wheels?

  1. ((a))

    High-pressure forging of abrasive particles

  2. ((b))

    Controlled firing at moderate temperature

  3. ((c))

    Low-temperature drying without firing

  4. ((d))

    Chemical polymerization at room temperature

Show Answer
Answer: ((a))

High-pressure forging of abrasive particles

110

When a mild steel bar is loaded in tension within the elastic limit, the relation between stress and strain is:

  1. ((a))

    Stress ∝ Strain

  2. ((b))

    Stress independent of strain

  3. ((c))

    Stress ∝ √(Strain)

  4. ((d))

    Stress ∝ (Strain)2

Show Answer
Answer: ((a))

Stress ∝ Strain

111

A center drill is used before drilling because it:

  1. ((a))

    Reduces the spindle rotation of the lathe

  2. ((b))

    Increases the temperature at the cutting zone

  3. ((c))

    Removes burrs and debris from the drilled hole

  4. ((d))

    Provides a pilot hole to guide the main drill

Show Answer
Answer: ((a))

Reduces the spindle rotation of the lathe

112

What is the typical least count of a bevel protractor with a vernier scale?

  1. ((a))

    10 minutes

  2. ((b))

    0.1°

  3. ((c))

    1°

  4. ((d))

    5 minutes

Show Answer
Answer: ((a))

10 minutes

113

Given are four concurrent forces: 10 N east, 20 N north, 15 N west, 25 N south. What is the direction of the resultant force?

  1. ((a))

    North-east

  2. ((b))

    North-west

  3. ((c))

    South-east

  4. ((d))

    South-west

Show Answer
Answer: ((a))

North-east

114

A mechanical engineer needs to choose a steel for a structural component that requires moderate ductility and high weldability. Based on the chemical composition and classification, which steel type should be recommended?

  1. ((a))

    Mild steel with increased silicon and phosphorus content

  2. ((b))

    Alloy steel with high manganese and vanadium content

  3. ((c))

    Alloy steel with high chromium and nickel content

  4. ((d))

    Mild steel with low carbon and minimal alloying elements

Show Answer
Answer: ((a))

Mild steel with increased silicon and phosphorus content

115

Which characteristic is assessed in the bend test for welded joints?

  1. ((a))

    Chemical composition check

  2. ((b))

    Magnetic properties check

  3. ((c))

    Ductility of the weld metal

  4. ((d))

    Surface finish of the weld

Show Answer
Answer: ((a))

Chemical composition check

116

The center of pressure for a submerged horizontal plane surface is:

  1. ((a))

    The point of total hydrostatic force, located below the centroid when the surface is inclined

  2. ((b))

    The centroid of the plane surface, representing the geometric center of the submerged area

  3. ((c))

    The top edge of the submerged surface, taken as the uppermost boundary of fluid contact

  4. ((d))

    A position independent of the depth of immersion, unaffected by how far the surface is submerged

Show Answer
Answer: ((a))

The point of total hydrostatic force, located below the centroid when the surface is inclined

117

Which property most significantly differentiates mild steel from alloy steel when exposed to high-temperature mechanical stress in industrial applications?

  1. ((a))

    Mild steel has enhanced corrosion resistance at high temperatures compared to alloy steel

  2. ((b))

    Mild steel provides improved wear resistance under high temperatures compared to alloy steel

  3. ((c))

    Alloy steel maintains higher mechanical strength at elevated temperatures compared to mild steel

  4. ((d))

    Alloy steel demonstrates greater ductility at elevated temperatures than mild steel

Show Answer
Answer: ((a))

Mild steel has enhanced corrosion resistance at high temperatures compared to alloy steel

118

Which of the following is considered a common surface defect in welding processes?

  1. ((a))

    Incomplete penetration at root

  2. ((b))

    Lamellar tearing in plate

  3. ((c))

    Excessive spatter deposits

  4. ((d))

    Undercut along the weld bead

Show Answer
Answer: ((a))

Incomplete penetration at root

119

Why does the vapor pressure of a liquid increase with an increase in temperature?

  1. ((a))

    Density reduces in a straight-line manner

  2. ((b))

    Molecules gain kinetic energy to escape into vapor

  3. ((c))

    Surface tension remains constant

  4. ((d))

    Viscosity reduces exponentially

Show Answer
Answer: ((a))

Density reduces in a straight-line manner

120

Which of the following pair of processes in the Otto cycle are both isentropic?

  1. ((a))

    Heat addition and heat rejection processes

  2. ((b))

    Compression and heat rejection processes

  3. ((c))

    Expansion and heat addition processes

  4. ((d))

    Compression and expansion processes

Show Answer
Answer: ((a))

Heat addition and heat rejection processes

121

Which component is essential in a profile projection method for accurately displaying the outline of a machine part?

  1. ((a))

    Curved screen with angled light projection

  2. ((b))

    Non-reflective surface with ambient room lighting

  3. ((c))

    Simple lamp with diffused translucent screen

  4. ((d))

    Collimated light source with precise screen alignment

Show Answer
Answer: ((a))

Curved screen with angled light projection

122

Which of the following is NOT a type of water-based cutting fluid?

  1. ((a))

    Dispersion

  2. ((b))

    Solution

  3. ((c))

    Emulsion

  4. ((d))

    Grease

Show Answer
Answer: ((a))

Dispersion

123

The most effective method for applying cutting fluid during high-speed machining is:

  1. ((a))

    Atomized spray

  2. ((b))

    Drip system

  3. ((c))

    Flooding

  4. ((d))

    Hand pouring

Show Answer
Answer: ((a))

Atomized spray

124

Which component in a cylindrical grinding machine provides longitudinal movement to the workpiece?

  1. ((a))

    Spindle for work rotation

  2. ((b))

    Table with sliding mechanism

  3. ((c))

    Coolant system with pump

  4. ((d))

    Wheel guard for safety

Show Answer
Answer: ((a))

Spindle for work rotation

125

The area under load v/s elongation diagram for a ductile material upto fracture indicates _____.

  1. ((a))

    Resilience

  2. ((b))

    Toughness

  3. ((c))

    Modulus of toughness

  4. ((d))

    Modulus of resilience

Show Answer
Answer: ((a))

Resilience

126

A force of 100 N acting on a rigid body is moved to another point along the same line of action. What is the effect on the external equilibrium of the body?

  1. ((a))

    The external equilibrium remains unchanged

  2. ((b))

    The effect depends on the material

  3. ((c))

    The force magnitude becomes zero

  4. ((d))

    The external equilibrium changes

Show Answer
Answer: ((a))

The external equilibrium remains unchanged

127

In ABC analysis, the letter 'C' is designated to:

  1. ((a))

    high valued items, smaller in number

  2. ((b))

    high valued items, larger in number

  3. ((c))

    low valued items, larger in number

  4. ((d))

    low valued items, smaller in number

Show Answer
Answer: ((a))

high valued items, smaller in number

128

What is the nature of strain as a physical quantity?

  1. ((a))

    It is dimensionless.

  2. ((b))

    It has units of length.

  3. ((c))

    It has units of volume.

  4. ((d))

    It has units of force per area.

Show Answer
Answer: ((a))

It is dimensionless.

129

In ___________ process, heat is added during Otto cycle.

  1. ((a))

    Isentropic compression

  2. ((b))

    Constant volume

  3. ((c))

    Constant pressure

  4. ((d))

    Isothermal expansion

Show Answer
Answer: ((a))

Isentropic compression

130

Which of the following best describes the purpose of ABC analysis in inventory management?

  1. ((a))

    To store inventory items according to their physical characteristics in the warehouse

  2. ((b))

    To group inventory items based on supplier location and delivery schedule

  3. ((c))

    To organize inventory items solely by their production shelf life in warehouse

  4. ((d))

    To categorize inventory items based on significance in value and usage frequency

Show Answer
Answer: ((a))

To store inventory items according to their physical characteristics in the warehouse

131

Which of the following plots is used for the classification of types of facilities and layouts used for different levels of the production?

  1. ((a))

    Production quantity vs. product cost plot

  2. ((b))

    Production mass vs. product variety plot

  3. ((c))

    Product cost vs. product variety plot

  4. ((d))

    Production quantity vs. product variety plot

Show Answer
Answer: ((a))

Production quantity vs. product cost plot

132

During oxy-acetylene gas welding, improper adjustment of the neutral flame can most likely result in which weld defect on stainless steel?

  1. ((a))

    Excessive oxidation at the weld bead surface

  2. ((b))

    Occurrence of incomplete root fusion in the joint

  3. ((c))

    Formation of significant undercut along the joint

  4. ((d))

    Development of porosity within the weld metal

Show Answer
Answer: ((a))

Excessive oxidation at the weld bead surface

133

Which of the following is a necessary modification in Newton’s second law to derive D'Alembert’s principle for a dynamic system?

  1. ((a))

    Include only gravitational forces in the analysis

  2. ((b))

    Incorporate a fictitious force equal to "minus mass times acceleration"

  3. ((c))

    Replace all forces with their average values

  4. ((d))

    Omit all resistive forces acting on the system

Show Answer
Answer: ((a))

Include only gravitational forces in the analysis

134

In malleability, material is subjected to which of the following stresses?

  1. ((a))

    Compressive stress

  2. ((b))

    Tensile stress

  3. ((c))

    Fatigue stress

  4. ((d))

    Shear stress

Show Answer
Answer: ((a))

Compressive stress

135

If a block slides down a rough plane inclined at 30° with a coefficient of friction of 0.2, the net acceleration is:

  1. ((a))

    0.326 g

  2. ((b))

    Zero

  3. ((c))

    0.676 g

  4. ((d))

    0.5 g

Show Answer
Answer: ((a))

0.326 g

136

Which defect results from improper shielding during the welding process and causes gas pockets in the weld?

  1. ((a))

    Porosity

  2. ((b))

    Lack of fusion

  3. ((c))

    Slag inclusion

  4. ((d))

    Undercut

Show Answer
Answer: ((a))

Porosity

137

Under which scenario is a body on an inclined plane most likely to slip when subjected to a parallel force?

  1. ((a))

    Normal reaction is greater than weight

  2. ((b))

    Parallel force is opposite to frictional force

  3. ((c))

    Coefficient of friction is less than tangent of inclination

  4. ((d))

    Frictional force equals weight of the body

Show Answer
Answer: ((a))

Normal reaction is greater than weight

138

A force of 10 N acts along a line OB, which makes an angle of 60° with the horizontal line OA. What is the component of the force along the direction of the acute angle bisector of angle ∠AOB?

  1. ((a))

    10 sin 30° N

  2. ((b))

    10 cos 60° N

  3. ((c))

    10 N

  4. ((d))

    10 cos 30° N

Show Answer
Answer: ((a))

10 sin 30° N

139

Which of the following properties is used as the basis for temperature measurement in constant volume thermometers?

  1. ((a))

    Pressure

  2. ((b))

    Enthalpy

  3. ((c))

    Volume

  4. ((d))

    Entropy

Show Answer
Answer: ((a))

Pressure

140

In a two-stroke diesel engine, the exhaust gases are removed through:

  1. ((a))

    Ports

  2. ((b))

    Carburetor

  3. ((c))

    Spark plug

  4. ((d))

    Valves

Show Answer
Answer: ((a))

Ports

141

After leaving the low-pressure cylinder in a two-stage air compressor, where does the air go next?

  1. ((a))

    Back to the atmosphere

  2. ((b))

    To the intercooler

  3. ((c))

    To the high pressure cylinder directly

  4. ((d))

    To the air receiver tank

Show Answer
Answer: ((a))

Back to the atmosphere

142

What type of measurement does a 'comparator' work on?

  1. ((a))

    Basic measurement

  2. ((b))

    Direct measurement

  3. ((c))

    Relative measurement

  4. ((d))

    Absolute measurement

Show Answer
Answer: ((a))

Basic measurement

143

Water as a cutting fluid does NOT spread well over a surface to wet it because of _____.

  1. ((a))

    low surface tension

  2. ((b))

    high volatility

  3. ((c))

    high surface tension

  4. ((d))

    high buoyancy force

Show Answer
Answer: ((a))

low surface tension

144

When selecting an organic coating for a steel structure exposed to outdoor conditions, which combination of properties should be prioritized for effective long-term performance?

  1. ((a))

    Strong adhesion to substrate and high resistance to ultraviolet radiation.

  2. ((b))

    High chemical reactivity and low cohesion with steel to form a sacrificial layer.

  3. ((c))

    Ability to dissolve in water and rapid drying at room temperature.

  4. ((d))

    Low viscosity and low electrical insulation properties in the formulation.

Show Answer
Answer: ((a))

Strong adhesion to substrate and high resistance to ultraviolet radiation.

145

When selecting a material for a component subjected to cyclic loading and impact, which mechanical property should be prioritized along with hardness?

  1. ((a))

    Plasticity must be considered to increase mass

  2. ((b))

    Ductility must be considered to avoid oxidation

  3. ((c))

    Elasticity must be considered for better insulation

  4. ((d))

    Toughness must be considered to resist sudden failure

Show Answer
Answer: ((a))

Plasticity must be considered to increase mass

146

In a scenario where excessive spatter occurs during arc welding, which adjustment is most likely to mitigate the issue without compromising weld quality?

  1. ((a))

    Increasing travel speed marginally

  2. ((b))

    Decreasing base metal thickness

  3. ((c))

    Reducing arc length slightly

  4. ((d))

    Switching to a larger electrode

Show Answer
Answer: ((a))

Increasing travel speed marginally

147

Which characteristic best describes the arc in submerged arc welding?

  1. ((a))

    The arc is completely covered by a layer of flux

  2. ((b))

    The arc is visible and produces bright light during welding

  3. ((c))

    The arc is exposed to the atmosphere during welding

  4. ((d))

    The arc is shielded only by inert gas during welding

Show Answer
Answer: ((a))

The arc is completely covered by a layer of flux

148

Which of the following is a limitation of conventional oxy-fuel gas cutting?

  1. ((a))

    Cannot cut mild steel plates

  2. ((b))

    Cannot cut thick carbon steels

  3. ((c))

    Requires electrical input for operation

  4. ((d))

    Cannot cut stainless steel efficiently

Show Answer
Answer: ((a))

Cannot cut mild steel plates

149

Which of the following is a limitation of mechanical comparators?

  1. ((a))

    They cannot measure small deviations

  2. ((b))

    They require electricity

  3. ((c))

    They cannot measure linear dimensions

  4. ((d))

    Mechanical wear can reduce accuracy over time

Show Answer
Answer: ((a))

They cannot measure small deviations

150

A centrifugal pump is designed to deliver water at a rate of Q = 0.1 m3/s against a total head of H = 25 m. If the overall efficiency of the pump is η = 75%, what is the approximate power input required to drive the pump? (Assume the density of water is ρ = 1000 kg/m3 and the acceleration due to gravity is g = 9.81 m/s2).

  1. ((a))

    58.1 kW

  2. ((b))

    43.6 kW

  3. ((c))

    24.5 kW

  4. ((d))

    32.7 kW

Show Answer
Answer: ((a))

58.1 kW

Attempt this paper under real exam conditions

Timed interface, section switching, instant scoring, and question-by-question analytics — free.

Start Timed Attempt