Held in 2025
Paper last updated:
Take this paper as a timed mock test. Review your answers after you submit.
Read the paper at your pace. Open an explanation when you need it.
The people of ___________ were famously involved in execution of the Chipko movement.
Gujarat
Delhi
Garhwal Himalayas
Assam
Correct answer
Gujarat
Why do covalent compounds generally have low melting and boiling points?
They contain metallic bonds.
They have strong electrostatic forces.
They have a rigid lattice structure.
They have weak intermolecular forces.
Correct answer
They contain metallic bonds.
Which of the following elements has an atomic number of 8?
Hydrogen
Nitrogen
Carbon
Oxygen
Correct answer
Hydrogen
In an aquatic ecosystem, the phenomenon of biomagnification can best be studied in the case of _________.
phosphates
chlorine
organochlorine
DDT
Correct answer
phosphates
Which function key is used to move text or graphics in a document?
F2
F1
F12
F5
Correct answer
F2
A ball of mass 50 grams is moving with a velocity of 15 m/s. What is its kinetic energy?
3.750 J
1.875 J
5.625 J
7.500 J
Correct answer
3.750 J
In January 2025, India launched the NVS-02 satellite to strengthen which of the following navigation systems?
Galileo
Global Positioning System (GPS)
Navigation with Indian Constellation (NavIC)
Global Navigation Satellite System (GLONASS)
Correct answer
Galileo
Which of the following options is NOT a greenhouse gas?
Methane
Carbon tetrachloride
Nitrous oxide
Carbon dioxide
Correct answer
Methane
The main reason for which we are dependent on air is our _____.
osmoregulation
excretion
digestion
respiration
Correct answer
osmoregulation
Which of the following was NOT an artisan guild during the Mauryan period?
మౌర్య కాలంలో ఈ క్రింది వాటిలో ఏది కళాకారుల సంఘం (artisan guild) కాదు?
Astrologer / జ్యోతిష్యుడు
Potters / కుమ్మరులు
Carpenters / వడ్రంగులు
Bankers and Merchants / బ్యాంకర్లు మరియు వ్యాపారులు
Correct answer
Astrologer / జ్యోతిష్యుడు
Who among the following referred to the Directive Principles as the 'life-giving provisions' of the Constitution of India?
Ivor Jennings
BR Ambedkar
HM Seervai
LM Singhvi
Correct answer
Ivor Jennings
What is the primary function of a firewall tool in a computer network?
To speed up internet connections
To monitor and control incoming and outgoing network traffic
To store data securely
To detect and remove viruses
Correct answer
To speed up internet connections
The President has the power to dissolve which house of Parliament?
Lok Sabha only
Legislative Assembly
Both Rajya Sabha and Lok Sabha
Rajya Sabha only
Correct answer
Lok Sabha only
Who among the following developed the notation system for Hindustani classical music?
Pandit Ravi Shankar
Pandit Vishnu Narayan Bhatkhande
Ustad Bismillah Khan
Ustad Amjad Ali Khan
Correct answer
Pandit Ravi Shankar
Which of the following MS Excel functions is used to convert a numeric value into a text with a specific format?
NUMBERTOTEXT()
VALUE()
FORMAT()
TEXT()
Correct answer
NUMBERTOTEXT()
In which of the following events did Deepthi Jeevanji set a world record at the 2024 World Para Athletics Championships?
400 metres T20
200 metres T20
100 metres T20
600 metres T20
Correct answer
400 metres T20
A solution is prepared by dissolving 40 g of NaCl in 200 g of water. What is the mass per cent of NaCl in the solution?
45%
16.67%
20%
25%
Correct answer
45%
For the protection and improvement of the environmental quality, the Environment Protection Act came into force in the year _________.
1984
1992
1986
1972
Correct answer
1984
Who among the following Indian female cricketers won the Best International Cricketer Award (Women) at the BCCI Naman Awards 2025?
Smriti Mandhana
Mithali Raj
Harmanpreet Kaur
Jhulan Goswami
Correct answer
Smriti Mandhana
A concave lens has a focal length of −2 cm. What is its power?
25 D
−50 D
−0.5 D
0.5 D
Correct answer
25 D
What does LAN stand for?
Local Area Network
Large Area Network
Limited Access Node
Linked Access Network
Correct answer
Local Area Network
Radiations that are emitted from nuclear wastes are known to cause ________ at a high rate.
diseases
emotional defects
mutations
syndromes
Correct answer
diseases
Which country proposed the idea of holding a United Nations conference on human interactions with the environment in 1968?
United States
Canada
France
Sweden
Correct answer
United States
Which formula should be entered in cell C2 to multiply the values of cells A2 and B2 in Excel?
=A2+B2
=MULTIPLY(A2,B2)
=A2*B2
=A2-B2
Correct answer
=A2+B2
An object is placed 15 cm in front of a convex lens of focal length 25 cm. The image distance will be ______.
−37.5 cm
−10.0 cm
−9.37 cm
17.5 cm
Correct answer
−37.5 cm
Due to global warming, the temperature of the earth has increased by ________
0.8°C
0.7°C
0.6°C
0.5°C
Correct answer
0.8°C
An alloy is considered a homogeneous mixture because:
it contains two or more phases
it exhibits uniform composition throughout
its components can be separated by filtration
its components are chemically combined in fixed proportions
Correct answer
it contains two or more phases
Which of the following is NOT toxic to non-target organisms in the soil?
Organic fertilisers
Fungicides
Herbicides
Pesticides
Correct answer
Organic fertilisers
Which of the following bridges is constructed over the Brahmaputra River in India?
Dhola-Sadiya Bridge
Howrah Bridge
Mahatma Gandhi Setu
Pamban Bridge
Correct answer
Dhola-Sadiya Bridge
Which German optical technology firm inaugurated its first Global Capability Centre in Bengaluru in November 2024, with plans to double its workforce within three years?
Jenoptik
Leica
Schneider Kreuznach
Carl Zeiss AG
Correct answer
Jenoptik
The kinetic energy of an object is derived using which of the following equations of motion?
a = (v – u) / t
s = ut + ½ at2
v = u + at
v2 – u2 = 2as
Correct answer
a = (v – u) / t
What happens to the pH of pure water when a few drops of lemon juice are added?
The pH increases
The pH remains the same
The pH becomes neutral
The pH decreases
Correct answer
The pH increases
Which of the following correctly differentiates mixtures and compounds?
| Feature | Mixture | Compound |
|---|---|---|
| A) Separation | Can be separated by physical methods | Requires chemical methods |
| B) Composition | Fixed ratio | Variable ratio |
| C) Properties | Always the same as constituents | Different from constituents |
| D) Formation | By chemical reaction | By simple mixing |
Option A (Separation) is correct
Option D (Formation) is correct
Option B (Composition) is correct
Option C (Properties) is correct
Correct answer
Option A (Separation) is correct
What is the general orientation of the Himalayan ranges in the northwestern part of India?
East-South
Northeast to Southwest
South-North
Northwest to Southeast
Correct answer
East-South
What is the primary function of a computer firewall?
To speed up internet connectivity
To prevent unauthorised access to a private network
To detect and remove computer viruses
To store user passwords securely
Correct answer
To speed up internet connectivity
Which operating system is known for its open-source nature and community-driven development for desktops and laptops?
iOS
macOS
Windows
Linux
Correct answer
iOS
Which type of RAM is faster and DOES NOT require refreshing?
SRAM
Dynamic Random Access Memory
Flash Memory
ROM
Correct answer
SRAM
A sound wave with a low frequency will have _______.
a low amplitude
a short wavelength
a high pitch
a low pitch
Correct answer
a low amplitude
The power to issue an ordinance when Parliament is NOT in session is given to the President under which Article?
Article 72
Article 110
Article 123
Article 356
Correct answer
Article 72
A metal wire is stretched, but it does not break easily. This property is known as:
hardness
ductility
malleability
brittleness
Correct answer
hardness
The atomic mass of sulphur is 32 u, and sulphur exists as S₈ molecules. What is the molecular mass of sulphur?
256 u
32 u
64 u
128 u
Correct answer
256 u
Where can one find the option to change a PowerPoint template?
View → Slide Master
Insert → Themes
Design → Themes
Home → Layout
Correct answer
View → Slide Master
Who is known as the leader of the Green Revolution in India?
C Subramaniam
Prof. MS Swaminathan
Dr. Rajendra Prasad
Tribhuvandas Kishibhai Patel
Correct answer
C Subramaniam
Which of the following is NOT a source of collection of municipal solid waste?
Waste from homes
Radioactive waste
Waste from hospitals
Waste from schools
Correct answer
Waste from homes
Electricity production is categorised under which of the following economic sectors?
Primary sector
Secondary sector
Tertiary sector
Quaternary sector
Correct answer
Primary sector
Who among the following established the Bengal Chemical Swadeshi Stores?
Dadabhai Naoroji
Surendranath Banerjee
BG Tilak
Acharya PC Ray
Correct answer
Dadabhai Naoroji
The wavelength of ultraviolet radiations which is most powerful and causes damage to the DNA is _____.
UV-C
UV-B
UV-D
UV-A
Correct answer
UV-C
What happens when you click on the 'Forward' button in an email?
A blank email opens.
The original message is copied into a new email draft.
The email is permanently deleted.
The email is automatically sent to all contacts.
Correct answer
A blank email opens.
Which of the following will increase the heat produced by a heating element?
Using a material with high conductivity
Decreasing the applied voltage
Using a wire of lower resistance
Increasing the current flowing through the wire
Correct answer
Using a material with high conductivity
A car moving at a constant speed of 123 km/hr along a straight road is an example of ________.
uniform motion
rotational motion
random motion
non-uniform motion
Correct answer
uniform motion
Which of the following materials is likely to have the highest thermal conductivity?
Rubber
Air
Aluminium
Wood
Correct answer
Rubber
Which characteristic best describes an axial flow pump?
The fluid flows parallel to the pump shaft.
The fluid flows radially outward from the shaft.
The fluid flows perpendicular to the pump shaft.
The fluid flow is converted to heat energy.
Correct answer
The fluid flows parallel to the pump shaft.
Which of the following are used to improve pigment dispersion and the stability of coatings during organic coating?
Colloidal stabilisers
Pigment analyser
Curing stabilisers
Plasticisers
Correct answer
Colloidal stabilisers
What is the primary function of the tool post in a lathe machine?
To secure the workpiece firmly on the machine bed
To control the feed rate and depth of cut during machining
To hold and adjust the tool for a suitable working position
To support the compound rest and provide rotational movement
Correct answer
To secure the workpiece firmly on the machine bed
The S-N curve in fatigue testing shows the relationship between:
the number of cycles and strain amplitude
the number of cycles and stress amplitude
stress and strain
stress and displacement
Correct answer
the number of cycles and strain amplitude
Slag inclusion is the welding defect caused by ___________________.
gas being trapped, due to moisture
insufficient cleaning and preparation of the base metal before welding commences
contamination of either the filler or parent metals
incorrect edge penetration
Correct answer
gas being trapped, due to moisture
Tungsten Inert Gas Welding (TIG) is also called _______________.
Metal Inert Gas Welding
Gas Tungsten Arc Welding
Gas Metal Arc Welding
Thermo-compression Welding
Correct answer
Metal Inert Gas Welding
Which of the following centre-less grinding can be preferred for headed, stepped, or taper-shaped workpieces?
Plunge cut grinding
Taper out grinding
Rotation feed center-less grinding
Out feed grinding
Correct answer
Plunge cut grinding
Which statement best compares battery and magneto ignition systems in internal combustion engines?
Magneto systems require more frequent maintenance than battery systems.
Battery ignition systems are independent of engine speed, unlike magneto systems.
Battery ignition systems rely on stored electrical energy, whereas magneto systems generate power on-demand via electromagnetic induction.
Both systems depend on an external battery for operation.
Correct answer
Magneto systems require more frequent maintenance than battery systems.
In brazing, the filler metal is drawn into the joint by means of _____.
friction
damping action
capillary action
surface tension
Correct answer
friction
In Arc Welding Processes, GMAW stands for ______________________.
Gas Metal Arc Welding
Gas Molten Arbour Welding
Gas Molten Arc Welding
Gang Metal Arc Welding
Correct answer
Gas Metal Arc Welding
Which type of light is generally used in the photo etching process?
Infrared (IR) light
X-ray
Visible light
Ultraviolet (UV) light
Correct answer
Infrared (IR) light
How is the resultant force calculated if two forces act along the same straight line but in opposite directions?
R=F1+F2
\(R=\sqrt{F_{1}^{2} + F_{2}^{2} } \)
\(R=2F_1F_2cos\theta\)
\(R=F_1 - F_2\)
Correct answer
R=F1+F2
The radius of gyration about the polar axis of a circular lamina of radius 0.2 m is:
4.1 cm
0.14 m
0.1 m
π cm
Correct answer
4.1 cm
The intake valve closes at _____ for a low-speed engine and at _____ for high-speed four-stroke petrol engines.
60 deg after BDC; 10 deg after BDC
10 deg before BDC; 60 deg before BDC
60 deg before BDC; 10 deg before BDC
10 deg after BDC; 60 deg after BDC
Correct answer
60 deg after BDC; 10 deg after BDC
If the external diameter of a hollow shaft is three times greater than its internal diameter, what is the ratio of its torque-carrying capacity compared to that of a solid shaft of identical material and the same outer diameter?
65/81
80/81
26/27
81/80
Correct answer
65/81
In which type of engine is a mist lubricating system most commonly used?
Gas turbine engines
Rotary engines
Four-stroke diesel engines
Two-stroke petrol engines
Correct answer
Gas turbine engines
Which of the following is a common metrological application of interferometry?
Determining surface hardness
Analysing chemical composition
Measuring temperature
Inspecting machine parts for straightness
Correct answer
Determining surface hardness
What does specific fuel consumption (SFC) measure in an internal combustion engine?
The efficiency of the engine’s exhaust system
The total mass of the fuel used during engine operation
The fuel efficiency expressed as the amount of fuel consumed per unit of power produced
The ratio of air intake to fuel delivered per combustion cycle
Correct answer
The efficiency of the engine’s exhaust system
The Zeroth Law of Thermodynamics establishes the basis for which of the following?
Entropy increase in isolated systems
Heat transfer through conduction
Conservation of energy
Measurement of temperature
Correct answer
Entropy increase in isolated systems
A pump discharges water with a manometric head of 20 m. If the density of water is 1000 kg/m3 and gravity is 9.81 m/s2 , what is the approximate pressure increase provided by the pump?
20 kPa
2 kPa
196 kPa
9.81 kPa
Correct answer
20 kPa
Broaching of outside surfaces is called _____.
internal broaching
hallow broaching
surface broaching
hole broaching
Correct answer
internal broaching
How many mirrors are used for magnification in the Zeiss Ultra-Optimeter?
One
Two
Three
Four
Correct answer
One
In most of the SI engines, the intake valve opens a few degrees before the TDC on the exhaust stroke to:
allow for better scavenging of exhaust gases
ensure that the intake valve is fully open when the piston reaches the TDC
ensure complete combustion of the fuel-air mixture
increase the engine's compression ratio
Correct answer
allow for better scavenging of exhaust gases
Which of the following is NOT a function of the spirit level measuring instrument?
For measuring surface roughness
For determining flatness and straightness
For measuring angles
For measuring alignment of machine parts
Correct answer
For measuring surface roughness
Electroplating is the opposite of which of the following?
Electrolysis
Battery charging
Galvanic cell
Fuel cell
Correct answer
Electrolysis
The primary purpose of job rating or evaluation is to:
provide benefits like leave and housing
assess an employee's performance
motivate employees for higher production
determine the relative worth of different jobs
Correct answer
provide benefits like leave and housing
What is the primary function of the tailstock in a lathe?
To change the direction of the spindle movement
To provide support and bearing for the rotating job
To hold the cutting tool for machining operations
To control the speed of the spindle rotation
Correct answer
To change the direction of the spindle movement
A pitot tube is primarily used to measure:
dynamic pressure
static pressure
atmospheric pressure
flow velocity
Correct answer
dynamic pressure
In rack and pinion gear, the rack is a _____ and the pinion is a _____.
straight line gear; straight line gear
straight line gear; circular wheel
circular wheel; straight line gear
circular wheel; circular wheel
Correct answer
straight line gear; straight line gear
Which of the following is a special case of a spirit-level device?
Micrometer
Clinometer
Autocollimator
Kelvinometer
Correct answer
Micrometer
Angle gauges are generally made from which material?
Carbon fibre
Hardened steel
Wood
Plastic
Correct answer
Carbon fibre
In which type of oxy-acetylene welding flames are both acetylene and oxygen in equal proportions?
Neutral welding flame
Oxidising welding flame
Reducing welding flame
Carburising welding flame
Correct answer
Neutral welding flame
Which of the following types of steel would NOT typically undergo the normalising process?
High-carbon steel
Alloy steel
Medium-carbon steel
Stainless steel
Correct answer
High-carbon steel
Which of the following beams is classified as a statically determinate beam?
Propped cantilever beam
Continuous beam
Overhanging beam
Fixed beam
Correct answer
Propped cantilever beam
A grey body is defined as a body that:
absorbs all radiation incident upon its surface
reflects all radiation incident upon its surface
has emissivity less than 1 but constant for all wavelengths
has an emissivity that varies with wavelength of radiation
Correct answer
absorbs all radiation incident upon its surface
Fluid pressure is defined as:
the force per unit area exerted by a fluid at rest
the force acting parallel to a surface
the weight of a fluid per unit volume
the rate of the flow of fluid through a given area
Correct answer
the force per unit area exerted by a fluid at rest
What is the function of coolants in metal cutting or machining operation?
Decreases adhesion between chip and tool
Provides higher friction and wear between tool and workpiece
Increases wear and tear of tools and decrease tool life
Reduces machinability and machining forces
Correct answer
Decreases adhesion between chip and tool
If elastic strength increases 3 times, then Proof Resilience:
increases 3 times
decreases 9 times
decreases 3 times
increases 9 times
Correct answer
increases 3 times
In a two-stroke petrol engine, the primary function of the crankcase is to:
house the transfer port
store lubricating oil
cool the engine
act as a primary pumping chamber for the air-fuel mixture
Correct answer
house the transfer port
If a component has a Factor of Safety (FoS) of 1.0, what does it indicate?
The design is highly conservative.
The component will never fail irrespective of any load.
The design is unsafe and should not be designed.
The material will fail exactly at the expected load.
Correct answer
The design is highly conservative.
What will be the shape of the bending moment diagram for a cantilever beam carrying a uniformly distributed load throughout its length?
Cubical
A straight line
A parabola
A hyperbola
Correct answer
Cubical
The primary reason for diesel engines having more efficiency than gasoline engines is they _______________.
have a longer stroke
have a higher compression ratio
use a different fuel
operate at higher temperatures
Correct answer
have a longer stroke
Which type of fracture is most likely to occur in a material with high tensile strength but low ductility?
Fatigue failure
Ductile fracture
Creep failure
Brittle fracture
Correct answer
Fatigue failure
In the _____________ welding technique, the welding rod is applied before the welding torch in the direction of motion.
forehand
backhand
laser
electric arc
Correct answer
forehand
In climb milling, metal is removed by the cutter rotating in the _____.
opposite direction of the feed of the workpiece
perpendicular direction of the feed of the workpiece
same direction of the feed of the workpiece
diagonal direction of the feed of the workpiece
Correct answer
opposite direction of the feed of the workpiece
Identify the critical path from the given diagram.
1-2-3-7
1-2-4-5-6-7
1-2-4-5-6
1-2-4-7
Correct answer
1-2-3-7
Which of the following elements provides the necessary horizontal force to the workpiece in centerless grinding?
Regulating wheel
Stationary wheel
Work test blade
Revolving wheel
Correct answer
Regulating wheel
In the CPM technique, the critical path slack is:
zero
negative
either negative or zero
positive
Correct answer
zero
If the temperature of a black body doubles, how many times will its emissive power increase?
8 times
4 times
16 times
2 times
Correct answer
8 times
Frictional power in an engine is calculated as:
Indicated power − Brake power
Brake power / Mechanical efficiency
Indicated power + Brake power
Indicated power × Mechanical efficiency
Correct answer
Indicated power − Brake power
In carburising welding flame, there is a supply of _______ in the combustible mixture.
limited acetylene proportion and more oxygen proportion
acetylene and oxygen in equal proportion
more acetylene proportion and limited oxygen proportion
only oxygen
Correct answer
limited acetylene proportion and more oxygen proportion
_______________ type of electrode is used in Gas Tungsten Arc Welding (GTAW).
Non-consumable tungsten
Consumable bare
Consumable coated
Non-consumable carbon
Correct answer
Non-consumable tungsten
Which alloying element in alloy steel is primarily responsible for enhancing corrosion resistance?
Chromium
Manganese
Silicon
Carbon
Correct answer
Chromium
The type of lasers commonly used in laser interferometers for metrology applications are _____.
solid-state lasers
dye lasers
gas lasers
excimer lasers
Correct answer
solid-state lasers
In Carbon Arc Welding, DCSP stands for _____________________.
Direct current straight porosity
Direct current straight pressure
Direct current straight polarity
Dual current straight polarity
Correct answer
Direct current straight porosity
In Arc Welding process, chipping hammer is used to __________________.
clean the surface to be welded
remove the slag by striking
protect the eyes
hold the electrode manually and conducting current to it
Correct answer
clean the surface to be welded
How does atmospheric pressure influence gauge pressure measurements?
Gauge pressure is independent of atmospheric pressure.
Gauge pressure equals atmospheric pressure minus absolute pressure.
Gauge pressure is the difference between absolute pressure and atmospheric pressure.
Gauge pressure is the sum of absolute and atmospheric pressure.
Correct answer
Gauge pressure is independent of atmospheric pressure.
What is the full form of ‘CBN’, which is used as an abrasive in grinding processes?
Calcium bi nitrous
Carbon boron nitrate
Copper boron nitride
Cubic boron nitride
Correct answer
Calcium bi nitrous
Drill chuck is the major part of drilling machines, which _____.
transmits rotary motion to the drill spindle at a number of speeds
rests on the base and supports the head and the table
holds the drill bit
holds electric motor, V-pulleys and V-belt
Correct answer
transmits rotary motion to the drill spindle at a number of speeds
While measuring surface texture, the part of the profilometer that makes contact with the workpiece surface is:
an electrical pickup
a finely pointed stylus
a motorised mechanism
a recording unit
Correct answer
an electrical pickup
What is a characteristic of a coplanar parallel force system?
Forces act in different planes and are parallel.
Forces act in the same plane but are not parallel.
Forces act in different planes and are not parallel.
Forces act in the same plane and are parallel.
Correct answer
Forces act in different planes and are parallel.
Which of the following factors generally increases the brittleness of a material?
High alloy content
Low temperature
High temperature
High strain rate
Correct answer
High alloy content
A simply supported beam with a span length of 5 m carries a moment of 20 N-m (counterclockwise direction) at the middle of the beam. What will the value of reactions be at both the ends of the beam?
4 N, −4 N
8 N, −8 N
5 N, −5 N
N, −2 N
Correct answer
4 N, −4 N
Why does stainless steel resist rusting, while regular carbon steel does not?
Stainless steel has a thicker iron content.
Stainless steel has a protective chromium oxide layer that prevent rusting.
Stainless steel has higher carbon content which makes it corrosion resistant.
Stainless steel is coated with a special anti-rust chemical.
Correct answer
Stainless steel has a thicker iron content.
A beam with a symmetrical T section has a top flange 50 mm wide and 20 mm thick, and a web 40 mm high and 10 mm thick. An additional plate, 10 mm thick and 60 mm wide, is welded above the flange. The moment of inertia of this symmetrical planar cross- section about an axis in its plane normal to the web and in line with the upper face of the 10 mm thick plate works out to 1506,666.66 mm4. The centroidal axis of the combined area is 21.5 mm below this axis, normal to the web. The moment of inertia of this built-up area about the centroidal axis is (in mm4):
2,17,833.34
70,077.52
5,82,166.66
1.33 × 105
Correct answer
2,17,833.34
In which of the following situations would brittleness be most UNDESIRABLE?
In materials used in high-speed applications
In tools that need to withstand heavy impact
In structural beams under static load
In materials exposed to high temperatures
Correct answer
In materials used in high-speed applications
When two equal forces F act at an angle θ, the resultant force is given by which of the following expressions?
\(R=2Fsin(\frac{\theta}{2})\)
\(R=F_1+F_2 \)
\(R=F_1-F_2\)
\(R=2Fcos(\frac{\theta}{2})\)
Correct answer
\(R=2Fsin(\frac{\theta}{2})\)
A symmetrical I-section has a moment of inertia about the centroidal axis in its plane perpendicular to the web, of 22.34 × 104 mm4. The moment of inertia of the full rectangular area occupied by the I-beam cross section about this axis is 65 × 104 mm4.
The two empty spaces on either side of the web are square. What is the height of the web?
50 mm
30 mm
55 mm
40 mm
Correct answer
50 mm
_____ is a welding defect caused by trapping of gas during the welding process.
Undercut
Burn through
Cracking
Porosity
Correct answer
Undercut
Which of the following is a benefit of using Material Requirements Planning (MRP)?
Reduced customer service and satisfaction
Increased raw material costs
Better inventory planning and scheduling
Slower response to market changes
Correct answer
Reduced customer service and satisfaction
According to Maslow's Hierarchy of Needs, the basic requirements of the human body such as food, water, sleep, etc. are categorised into:
physiological needs
esteem needs
self-actualisation needs
social needs
Correct answer
physiological needs
Compared to axial flow pumps, radial flow pumps typically:
generate higher pressures with lower flow rates
are used exclusively for pumping gases
have lower efficiency in all applications
produce higher flow rates at lower pressures
Correct answer
generate higher pressures with lower flow rates
An engine is assumed to be working on ideal Otto cycle with the temperatures at the beginning and end of compression as 27 °C and 327 °C. The air-standard efficiency of the engine is:
87%
78%
60%
50%
Correct answer
87%
Manometric head is defined as:
the height of a fluid column corresponding to the pump’s output pressure
the weight of the pump
the temperature difference across the pump
the fluid velocity within the pump
Correct answer
the height of a fluid column corresponding to the pump’s output pressure
Which of the following material has the highest compressive strength?
Copper
Mild Steel
Rubber
Cast Iron
Correct answer
Copper
Which of the following represents the polar modulus of the hollow shaft?
[ If Do = External diameter and Di = Internal diameter ]
[ 16π/Do ] [ \({Do}^4 - {Di}^4\) ]
[ π/16Do ] [ \({Do}^3 - {Di}^3\) ]
[ π/16Do ] [ \({Do}^4 - {Di}^4\) ]
[ 16/πDo ] [ \({Do}^4 - {Di}^4\) ]
Correct answer
[ 16π/Do ] [ \({Do}^4 - {Di}^4\) ]
While scheduling decisions, the most influencing parameter is:
market research
sales forecasting
competitor pricing
availability of skilled personnel
Correct answer
market research
In an ideal four-stroke petrol engine, the assumption made about the burning process during the power stroke i.e. after compression is:
It occurs instantaneously when the piston is at the top dead centre.
It starts at the bottom dead centre and continues as the piston moves up.
It is a gradual process that starts before the piston reaches top dead centre.
It takes a significant amount of time.
Correct answer
It occurs instantaneously when the piston is at the top dead centre.
In the Charpy impact test, the specimen is typically:
a cylindrical rod with no defects
a rectangular bar with a notch in the middle
a sheet of material placed under compression
subjected to a gradual tensile load
Correct answer
a cylindrical rod with no defects
A steel bar (E = 200E = 200, α = 12 × 10 − 6/°C) expands by 0.3 mm due to a temperature increase. If the original length of the bar was 15 cm, what was the temperature rise?
166.6°C
100°C
180°C
120.6°C
Correct answer
166.6°C
What is the capability of a profilometer instrument?
Measure surface waviness only
Measure surface roughness only
Measure surface flaws only
Measure roughness together with waviness and any other surface flaws
Correct answer
Measure surface waviness only
What will be the nature of longitudinal stress in a thin closed cylinder containing hydrostatic fluid pressure?
Bending
Shear
Compressive
Tensile
Correct answer
Bending
Which of the following happens when two equal and opposite forces are applied at a point on a rigid body?
They produce an additional force on the body.
They create rotational motion in the body.
They cancel each other and have no effect.
They change the magnitude of the original force.
Correct answer
They produce an additional force on the body.
One challenge associated with double volute casings is:
increased complexity in manufacturing and alignment
higher risk of leakage due to multiple seams
decreased efficiency in converting kinetic to pressure energy
reduced flow rates
Correct answer
increased complexity in manufacturing and alignment
To machine an internal hole in a broaching operation, the broach is gripped by the _____.
puller at the pilot
puller at the face of the teeth
puller at the flute
puller at the shank end
Correct answer
puller at the pilot
Which of the following is the surface coating process?
Tumbling
Hot doping
Hot dipping
Pickling
Correct answer
Tumbling
Which of the following is a limitation of taper turning by swiveling the compound rest?
It ensures the best surface finish.
It is suitable only for short tapers.
It provides high production efficiency.
It cannot turn any type of taper.
Correct answer
It ensures the best surface finish.
What is the designated function of a 'planetary internal grinder machine'?
For a work piece of irregular shape
For a very small work piece
For a work piece of regular shape
For low precision surface finishes
Correct answer
For a work piece of irregular shape
Which of the following processes produces the minimum surface roughness on workpieces?
Honing
Superfinishing
Grinding
Lapping
Correct answer
Honing
How does the volute shape in a single volute pump casing affect performance?
It helps maintain a uniform flow distribution.
It increases turbulence within the pump.
It restricts the pump’s operating range.
It serves only an aesthetic purpose.
Correct answer
It helps maintain a uniform flow distribution.
The factor considered for wage determination in the flat day rate basic wage incentive plan is:
individual performance
number of pieces produced
company profit
hours worked
Correct answer
individual performance
Which of the following is an operational function that comes under pre planning?
Dispatching
Material planning and control
Loading
Forecasting
Correct answer
Dispatching
The master production schedule represents the:
starting time of component manufacturing
financial requirements for the production
starting and finishing time of different products
finishing time of component manufacturing
Correct answer
starting time of component manufacturing
Priming of a pump refers to:
removing air from the pump casing and suction line
lubricating the pump bearings
increasing the rotational speed of the pump
adjusting the impeller clearance
Correct answer
removing air from the pump casing and suction line
The primary purpose of a shadow projector is to _____.
detect internal flaws in a material
analyse material composition
produce an undistorted magnified reflected image of an object
measure surface roughness
Correct answer
detect internal flaws in a material
The Bell-Coleman cycle is also known as:
Reversed Brayton cycle
Brayton cycle
Rankine cycle
Carnot cycle
Correct answer
Reversed Brayton cycle
For a symmetrical T-section, the moment of inertia through centroidal axes in its plane parallel to the flange Ixx = 2 × 107 mm4, and perpendicular to the flange is Iyy = 1.5 × 107mm4. The moment of inertia about the centroidal axis normal to the planar area works out to (in mm4):
1.33 × 107
2.5 × 107
3.5 × 107
0.5 × 107
Correct answer
1.33 × 107
Which of the following best defines vapour pressure in a liquid?
The pressure exerted by the vapour in equilibrium with its liquid at a given temperature
The pressure exerted by the liquid molecules
The pressure required to force the liquid into a capillary tube
The difference between atmospheric pressure and absolute pressure
Correct answer
The pressure exerted by the vapour in equilibrium with its liquid at a given temperature
Which of the following options best describes non-coplanar concurrent forces?
Forces that meet at one point but their lines of action do not lie on the same plane
Forces that do not meet at one point and their lines of action lie on the same plane
Forces that meet at one point and their lines of action lie on the same plane
Forces that do not meet at one point but their lines of action lie on different planes
Correct answer
Forces that meet at one point but their lines of action do not lie on the same plane
150 questions in the full paper