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In the following, four roll numbers or centre codes are given. Three share a common pattern or belong to one group, but one is different. Select the odd one out.
600319, 601402, 620310, 601213
600319
601402
620310
601213
Correct answer
600319
In the following, four roll numbers or centre codes are given. Three share a common pattern or belong to one group, but one is different. Select the odd one out.
920818, 921223, 921419, 930101
920818
921223
921419
930101
Correct answer
920818
Complete the analogy. ABD : CEF :: GIK : ?
HJL
JKL
JLQ
ILM
Correct answer
HJL
Complete the analogy.
AEIM : BFJN :: CGKO : ?
DHLP
DGJM
DGLN
EIKN
Correct answer
DHLP
Find the missing term in the series: D, F, I, M, ?
P
Q
R
S
Correct answer
P
Find the missing term in the series: C, D, F, I, M, ?
R
Q
S
P
Correct answer
R
Find the missing number in the series: 5, 7, 10, 15, 22, ?
30
31
33
35
Correct answer
30
Find the missing number in the series: 4, 11, 30, 67, ?
128
130
125
121
Correct answer
128
Complete the analogy.
Odometer : Distance :: Thermometer : ?
Pressure
Temperature
Time
Heat
Correct answer
Pressure
Complete the analogy.
Obfuscate : Clarity :: Prevaricate : ?
Honesty
Activity
Intention
Invention
Correct answer
Honesty
Select the option that does NOT belong to the same category as the others: Apple, Banana, Litchi, Carrot
Apple
Banana
Litchi
Carrot
Correct answer
Apple
Select the option that does NOT belong to the same category as the others: Copper, Gold, Silver, Plastic
Copper
Gold
Silver
Plastic
Correct answer
Copper
Select the option that does NOT belong to the same category as the others: Cabbage, Spinach, Potato, Cauliflower
Cabbage
Potato
Spinach
Cauliflower
Correct answer
Cabbage
Find the odd one out in the given semantic series based on the pattern identified. Moon, Jupiter, Saturn, Uranus
Moon
Jupiter
Saturn
Uranus
Correct answer
Moon
Find the odd one out in the given semantic series based on the pattern identified.
Bureaucracy, Opposition, Cabinet, Media
Bureaucracy
Opposition
Cabinet
Media
Correct answer
Bureaucracy
Select the option that does NOT belong to the same category as the others:
17, 19, 21, 23
17
19
21
23
Correct answer
17
Select the option that does NOT belong to the same category as the others: 81, 125, 343, 729
81
125
343
729
Correct answer
81
Four people, P, Q, R, and S, live on floors 1-4. S is immediately below Q; P is not on floor 4; S is exactly two floors above R. Who lives on floor 1?
S
Q
R
P
Correct answer
S
Five people, P, Q, R, S, and T, live in the houses 21, 23, 25, 27, 29: R lives just above Q; P is the lowest; S lives above R but not the highest; T is the highest.
Who lives at house 27?
R
S
Q
T
Correct answer
R
In a certain code, ROSE is written as SPTF, then WORD will be coded as:
XPQD
XPRE
XPRF
XPSE
Correct answer
XPQD
In a certain code, MONDAY is written as NNOCBX. How is FRIDAY coded?
GSJEBZ
GRIEBZ
GSJEBY
GQJCBX
Correct answer
GSJEBZ
City’s air pollution levels drop sharply over a week. What could be the most probable reason?
All factories doubled production
Citizens bought more air purifiers
Rainfall was delayed this season
Strict vehicle movement restrictions were imposed
Correct answer
All factories doubled production
Statement: "Foreign tourists will be offered free city tour buses on weekends." Which assumption is implicit?
Foreign tourists can travel without guides
Free tours will attract more tourists
Hotels will provide these tours
Weekdays are more popular than weekends
Correct answer
Foreign tourists can travel without guides
Four travellers, V, W, X, and Y, visited cities on 7th, 9th, 11th, and 13th December. X visited before W; Y visited immediately after V; V did not visit on the 7th; W did not visit on the 13th. Who visited on the 11th?
V
W
X
Y
Correct answer
V
Five friends - D, R, S, T, and K - went to a city on the 2nd, 4th, 6th, 8th, and 10th of August. R went on the 4th. K went on the 10th. T did not go on the 2nd. T went before D. S did not go immediately after R. Who went on the 8th?
S
K
T
D
Correct answer
S
A colleague shares that they made a small mistake at work. What’s the best first reaction?
Criticise them
Laugh about it
Reassure and help fix it
Ignore it
Correct answer
Criticise them
In a team, one member dominates conversations. How do you ensure others’ contributions?
Gently invite others to share views
Stop the person mid-sentence
Ignore the imbalance
Leave the meeting early
Correct answer
Gently invite others to share views
A man spends \(\frac{1}{3}\) of his salary on rent and \(\frac{1}{5}\) on food. If the salary is ₹30,000, then how much remains?
₹14,000
₹16,000
₹18,000
₹20,000
Correct answer
₹14,000
Find the missing term: 2, 5, 10, 17, 26, ?
35
37
39
41
Correct answer
35
If 12 men can reap a field in 8 days working 7 hours/day, then how many hours/day must 16 men work to reap the same field in 6 days?
5
6
8
7
Correct answer
5
In a group, one person dominates the conversation about a shared problem.
How do you involve others?
Acknowledge them and invite others’ views
Interrupt and talk over
Wait silently for them to finish
Ask them to stop talking
Correct answer
Acknowledge them and invite others’ views
From the letters L A P N E T, which valid word can be made?
PLANET
PLANTE
PANTLE
PALENT
Correct answer
PLANET
While shopping, you end up short of money at the counter. What is the best decision?
Argue with the cashier
Leave some items and pay
Ask to take goods on credit
Leave the store angry
Correct answer
Argue with the cashier
After introducing flexible hours, productivity stays the same but employee satisfaction rises. What’s your best decision as HR head?
Cancel flexible hours
Retain a flexible schedule
Reduce pay
Make hours stricter
Correct answer
Cancel flexible hours
A university research grant is given mainly to projects led by senior professors, though junior faculty proposals have equal merit scores. Which inference is valid?
Senior professors are favoured
Juniors avoid applying
Only seniors can handle grants
Senior research is cheaper
Correct answer
Senior professors are favoured
Public transport fares fell \(10%\) and passenger numbers rose \(25%\)%. Which inference is valid?
Lower fares attracted more passengers
More buses were bought
City traffic reduced
Pollution dropped
Correct answer
Lower fares attracted more passengers
Sales of winter clothing dropped \(20%\), though winter was colder than usual. Which inference is valid?
Prices increased significantly
Quality improved
People had enough clothing from the previous year
Advertising increased
Correct answer
Prices increased significantly
A store has sales increasing but customer complaints are rising too. What should be inferred?
Sales growth means good service
Complaints are from competitors
Complaints mean problems to fix
Complaints do not matter
Correct answer
Sales growth means good service
Online store sales rose \(20%\), but customer complaints about delivery time doubled. Which is the most valid judgement?
Sales growth causes delivery issues
Complaints are false
Delivery service improved
Deliveries became faster
Correct answer
Sales growth causes delivery issues
Calculate \([(225 \div 15)+(196 \div 14)] \times [(100 \div 5)-(81 \div 9)]\).
319
108
210
421
Correct answer
319
If @ = multiplication, % = subtraction, $ addition, and # = division, then find the value of 8 @ 5 % 6 $ 10 # 2.
38
37
39
36
Correct answer
38
A man points to a woman and says, "Her mother is the wife of my father".
How is the woman related to the man?
Cousin
Daughter
Niece
Sibling
Correct answer
Cousin
Pointing to a woman, Madan said, "Her son is my father’s only grandson".
How is the woman related to Madan?
Sister of Madan
Aunt of Madan
Wife of Madan
Grandmother of Madan
Correct answer
Sister of Madan
A clock shows the time as 3:30. What is the angle between the hour and minute hands?
75\(^\circ\)
90\(^\circ\)
105\(^\circ\)
120\(^\circ\)
Correct answer
75\(^\circ\)
A can complete work in 15 days, and B in 20 days. If both work together for 4 days, what fraction of the work remains?
\(\frac{7}{15}\)
\(\frac{8}{15}\)
\(\frac{11}{15}\)
\(\frac{13}{15}\)
Correct answer
\(\frac{7}{15}\)
In the following question, two statements are followed by two conclusions. You have to assume the given statements to be true, even if they seem to be at variance with commonly known facts. Read both the conclusions and then decide which of the given conclusions logically follows from the statements.
Statements:
All buses are vehicles.
Some vehicles are cars.
Conclusions:
I. All cars are buses.
II. Some cars are vehicles.
Only conclusion I follows
Only conclusion II follows
Both conclusions I and II follow
Neither conclusion I nor II follows
Correct answer
Only conclusion I follows
In the following question, two statements are followed by two conclusions. You have to assume the given statements to be true, even if they seem to be at variance with commonly known facts. Read both the conclusions and then decide which of the given conclusions logically follows from the statements.
Statements:
All chairs are wooden.
No wooden thing is cheap.
Conclusions:
I. No chair is cheap.
II. All cheap things are wooden.
Only conclusion II follows
Only conclusion I follows
Both conclusions I and II follow
Neither conclusion I nor II follows
Correct answer
Only conclusion II follows
Female employees report higher stress and fewer rest breaks than male employees.
What conclusion can be drawn?
Women tolerate stress better
Women get less rest, possible bias
Job roles differ by gender
Women work harder
Correct answer
Women tolerate stress better
Someone approaches you during break with a complaint about the cafeteria food.
What’s the socially intelligent reaction?
Listen and suggest who to contact
Tell them to stop complaining
Say "It’s not my problem"
Walk away
Correct answer
Listen and suggest who to contact
How does the World Happiness Report collect data?
Through surveys conducted by Gallup
Through economic indicators only
Through life expectancy data alone
Through perception of corruption surveys
Correct answer
Through surveys conducted by Gallup
How do wildfires heavily impact the Air Quality Index (AQI) levels?
Primarily by increasing \(SO_2\) concentrations.
Primarily by increasing ground-level ozone.
Primarily by increasing particulate matter concentrations.
Wildfires rarely affect the Air Quality Index (AQI) levels.
Correct answer
Primarily by increasing \(SO_2\) concentrations.
What is the objective of launching satellites like Cartosat?
Communication
Space exploration
Earth surface imaging
Solar studies
Correct answer
Communication
Which ISRO facility is used for satellite assembly, integration and testing?
URSC, Bengaluru
ISTRAC, Bengaluru
VSSC, Thiruvananthapuram
SHAR, Sriharikota
Correct answer
URSC, Bengaluru
Which Article of the Indian Constitution empowers the President to promulgate ordinances during the recess of Parliament?
Article 124
Article 126
Article 125
Article 123
Correct answer
Article 124
What is the aim of IN-SPACe?
Regulating foreign satellites over India
Launching defense satellites
Promoting private participation in the space sector
Training Indian astronauts
Correct answer
Regulating foreign satellites over India
The Chief Justice of India is appointed by :
The President
The Lok Sabha
The Prime Minister
The Parliament
Correct answer
The President
The Palk Strait separates which two South Asian countries?
India and Pakistan
India and Sri Lanka
Bangladesh and Myanmar
Maldives and India
Correct answer
India and Pakistan
Who proposed the concept of QUAD?
Japanese Prime Minister, Shinzo Abe
Australian Prime Minister, John Howard
Indian Prime Minister, Manmohan Singh
US President, George W. Bush
Correct answer
Japanese Prime Minister, Shinzo Abe
The Quad is generally seen as a counter to the growing influence of which country?
Russia
Brazil
Germany
China
Correct answer
Russia
Chabahar Port is part of which international transport corridor?
INSTC (The International North-South Transport Corridor)
The belt and road initiative
The Trans-Siberian Railway
The Pan-American Highway
Correct answer
INSTC (The International North-South Transport Corridor)
Which government policy aims to promote the manufacturing of goods in India and attract foreign investment in the manufacturing sector?
Digital India
Make in India
Smart Cities Mission
National Health Policy
Correct answer
Digital India
Which government initiative aims to conserve and rejuvenate major rivers in the country?
Namami Gange Programme
National Clean Air Programme
Jal Jeevan Mission
Swachh Bharat Mission
Correct answer
Namami Gange Programme
The "Competition Commission of India (CCI)" is a statutory body established for a specific purpose. Which of the following best describes the primary objective of the CCI?
To promote and regulate foreign trade agreements.
To ensure fair competition in the market and prevent anti-competitive practices.
To oversee the functioning of public sector banks and financial institutions.
To set standards for product quality and consumer safety.
Correct answer
To promote and regulate foreign trade agreements.
What is the name of India’s top domestic football competition for states and government institutions?
Durand Cup
Ranji Trophy
Santosh Trophy
I-League
Correct answer
Durand Cup
Which city is Eden Gardens, a famous cricket ground, located in?
Chennai
Mumbai
Kolkata
Bengaluru
Correct answer
Chennai
The Guru Gobind Singh Stadium, known for various sports, is located in which city?
Jalandhar
Amritsar
Ludhiana
Patiala
Correct answer
Jalandhar
Which Indian golfer was the first to win a European Tour title?
Jeev Milkha Singh
Anirban Lahiri
Arjun Atwal
Shiv Kapur
Correct answer
Jeev Milkha Singh
Which cricketing competition is named after a legendary Indian captain and focuses on the one-day format?
Ranji Trophy
Duleep Trophy
Vijay Hazare Trophy
Irani Cup
Correct answer
Ranji Trophy
The first Pro Kabaddi League final was played in Mumbai. Which specific indoor stadium hosted the event?
NSCI Dome
Sardar Vallabhbhai Patel Indoor Stadium
Brabourne Stadium Indoor Facility
Andheri Sports Complex Indoor Arena
Correct answer
NSCI Dome
The first IPL final was hosted in which stadium?
Wankhede Stadium, Mumbai
Chinnaswamy Stadium, Bengaluru
DY Patil Stadium, Navi Mumbai
Eden Gardens, Kolkata
Correct answer
Wankhede Stadium, Mumbai
The highest-ever individual score in an ODI by an Indian was achieved in which city?
Mumbai
Kolkata
Bengaluru
Chennai
Correct answer
Mumbai
Which of the following is commonly found at the top of a Buddhist stupa, symbolizing enlightenment?
Kalasha
Amalaka
Mandapa
Harmika with a Chhatra
Correct answer
Kalasha
The Jagannath Temple at Puri follows which architectural style?
Dravidian
Indo-Saracenic
Vesara
Nagara
Correct answer
Dravidian
Which of the following features is the most distinct in the Vesara style of temple architecture?
Tall gopurams
Fusion of Dravidian and Nagara styles
Use of white marble
Curvilinear shikhara
Correct answer
Tall gopurams
Which of these authors won the International Booker Prize for a translated work in 2022?
Jhumpa Lahiri
Arundhati Roy
Geetanjali Shree
Anuradha Roy
Correct answer
Jhumpa Lahiri
Which Booker Prize-winning novel by Hilary Mantel is centered on the rise of Thomas Cromwell in Henry VIII’s court?
Bring Up the Bodies
Wolf Hall
The Mirror and the Light
The Children’s Book
Correct answer
Bring Up the Bodies
Which Indian woman athlete won the silver medal in 100m hurdles at the 2023 Asian Games?
Jyothi Yarraji
Hima Das
Dutee Chand
Anju Bobby George
Correct answer
Jyothi Yarraji
What does "En Passant" refer to in chess?
King side castling
Capturing a pawn that moved two squares
Double check
Forced draw
Correct answer
King side castling
When was the Rajiv Gandhi Khel Ratna Award (now Major Dhyan Chand Khel Ratna Award) first awarded?
1985-86
1991-92
1998-99
2010-11
Correct answer
1985-86
In which Indian state is the "Sitalsasthi" festival celebrated to mark the divine marriage of Lord Shiva and Goddess Parvati?
Odisha
Jharkhand
West Bengal
Chhattisgarh
Correct answer
Odisha
What is the "Pooram" festival in Kerala famous for?
Fire walking
Decorated elephants and fireworks
Traditional food fairs
Boat races
Correct answer
Fire walking
The primary objective of the Bharatiya Sakshya Adhiniyam is :
To abolish evidence in trials
To modernize and digitize rules of evidence
To increase court fees
To promote oral evidence only
Correct answer
To abolish evidence in trials
What is one major benefit expected from implementing the Uniform Civil Code across India?
Legal monopoly of a single religion
Equal rights for all citizens in personal matters
Abolition of the judiciary
Increased religious divisions
Correct answer
Legal monopoly of a single religion
What is considered digital harassment as per the Bharatiya Nyaya Sanhita (BNS), 2023 ?
Sending unsolicited emails about new services
Downloading software from unofficial websites
Using public Wi-Fi for browsing
Sending threatening or obscene messages to a person over the internet
Correct answer
Sending unsolicited emails about new services
Which state became the first in India to implement the ’Right to Health’ Act?
Kerala
Rajasthan
Tamil Nadu
Punjab
Correct answer
Kerala
Who was appointed as the Director General (DG) of the Indian Council of Agricultural Research (ICAR) in 2025?
Rajesh Kumar Singh
Mangi Lal Jat
Trilochan Mohapatra
Sanjay Kumar Mishra
Correct answer
Rajesh Kumar Singh
Who is appointed as a full-time member of the Economic Advisory Council to the Prime Minister (EAC-PM) in April 2025?
Abhishek Singh
Poonam Gupta
Sanjay Kumar Mishra
Ajay Seth
Correct answer
Abhishek Singh
Which is the earliest recorded evidence of dance poses in ancient India?
The Vedas
Bronze statuette from Mohenjodaro
Inscriptions from the Maurya period
Temples of South India
Correct answer
The Vedas
Who is credited with the conception of the Rasleela dance form in Manipur?
King Churachand Singh
King Ranjit Singh
Maharaja Koireng Singh
King Bhagyachandra
Correct answer
King Churachand Singh
Which 12\(^{\text{th}}\)-century poem by Jayadeva significantly influenced the Odissi dance style?
Ashtapadi
Gita Govinda
Mahabharata
Ramayana
Correct answer
Ashtapadi
Which of the following statements is/are related to the benefits of Agroforestry in India?
Increment in soil nutrients through the addition and decomposition of litterfall.
Reduction in the incidence of total crop failure, common to single-cropping or monoculture systems.
Improvement in nutrition and health due to increased quality and diversity of food outputs.
1 and 2 only
2 and 3 only
1 and 3 only
1, 2 and 3 only
Correct answer
1 and 2 only
Temperature is a critical factor in growing this crop as it has no tolerance for frost. Yet, after the plant matures, slightly lower temperatures help increase the amount of sugar in it. Which one of the following crops is described in the passage mentioned above?
Tomatoes
Spinach
Sugarcane
Mustard
Correct answer
Tomatoes
Which of the following is a renowned female vocalist from the Jaipur-Atrauli Gharana?
Girija Devi
Ashwini Bhide-Deshpande
Anjanibai Malpekar
Kaushiki Chakraborty
Correct answer
Girija Devi
What does the term ’vadi’ refer to in the context of a raga?
The rhythm of the raga
The most important note in a raga
The composition based on a raga
The melodic ornamentation used in a raga
Correct answer
The rhythm of the raga
In the Natya Shastra, which category of instruments includes the drum and percussion instruments?
Tata Vadya
Sushira Vadya
Avanaddha Vadya
Ghana Vadya
Correct answer
Tata Vadya
Which among the following states has the smallest gap in percentage rates between male and female literacy as per 2011 census?
Mizoram
Kerala
Meghalaya
Nagaland
Correct answer
Mizoram
According to the Census (2011), which state has the highest number of ST population in India?
Madhya Pradesh
Uttar Pradesh
Arunachal Pradesh
Maharashtra
Correct answer
Madhya Pradesh
’Sorrow of Bengal’ is another name of which of the following rivers?
The Koshi
The Mayurakhi
The Damodar
The Ajay
Correct answer
The Koshi
Which of the following statements CORRECTLY defines "farm forestry"?
Planting ecologically friendly crops on farms to protect soil moisture.
Protecting soil moisture by covering it with farm residue.
Planting tree belts for commercial purposes on the margins of agricultural fields.
Promoting eco-friendly techniques in exploitation of forest resource.
Correct answer
Planting ecologically friendly crops on farms to protect soil moisture.
The average power consumed by a pure capacitor connected to a sinusoidal a.c. source over one complete cycle is:
Greater than zero
Equal to the peak instantaneous power
Zero
Undefined
Correct answer
Greater than zero
The total energy dissipated as heat in a pure inductor over one complete cycle of an a.c. source is:
The same as that due to a d.c. source of equivalent magnitude
Zero
Half of the peak stored energy
The full amount of energy stored in the magnetic field
Correct answer
The same as that due to a d.c. source of equivalent magnitude
Two coupled inductors have a mutual inductance (M) of \(50 \text{ mH}\). When they are connected in series-aiding, their total equivalent inductance is \(400 \text{ mH}\). If the self-inductances are equal (\(L1=L2\)), what is the value of each self-inductance?
\(200 \text{ mH}\)
\(150 \text{ mH}\)
\(100 \text{ mH}\)
\(250 \text{ mH}\)
Correct answer
\(200 \text{ mH}\)
Two resistors with nominal values of \(200\ \Omega\) and \(300\ \Omega\) are connected in series. Both resistors have a maximum percentage error of 10%. What is the maximum possible percentage error in their total equivalent resistance?
20%
5%
10%
Correct answer
A voltage divider circuit is built with three series resistors: R1=\(10 \Omega\), R2=\(20 \Omega\), and R3=\(30 \Omega\). If the total voltage across the series combination is \(12 V\), what is the voltage across the \(20 \Omega\) resistor?
Correct answer
In a series RLC circuit, the voltage across the resistor is 60 V, across the inductor is 100 V, and across the capacitor is 20 V. What is the magnitude of the total applied voltage?
100 V
160 V
180 V
120 V
Correct answer
100 V
In a liquid electrolyte, such as a salt solution, which charged particles are responsible for the flow of electric current?
Both positive and negative ions
Electrons and holes
Protons and electrons
Electrons only
Correct answer
Both positive and negative ions
A series RC circuit has a resistance of \(200~\Omega\) and a capacitance of \(100~\mu F\). If it is connected to a \(50Hz\), \(20V\) a.c. source, what is the phase angle between the voltage and the current?
45°
Correct answer
45°
If a transformer has a primary winding with 200 turns and a secondary winding with 50 turns, what type of transformer is it?
An isolation transformer
A step-up transformer
A variable transformer
A step-down transformer
Correct answer
An isolation transformer
What is the function of the secondary winding in a single-phase transformer?
It creates the main magnetic flux
It is connected to the voltage source
It provides the output voltage to the load
It is used for cooling the transformer
Correct answer
It creates the main magnetic flux
If a transformer has a turns ratio \((N_p/N_s)\) of 1:1, what is its purpose?
To change the frequency
To step up the voltage
To step down the voltage
To transfer power while providing electrical isolation
Correct answer
To change the frequency
Which component of a DC machine is responsible for reversing the direction of current in the armature winding to ensure continuous rotation?
The brushes
The commutator
The field winding
The armature
Correct answer
The brushes
Which of the following describes a separately excited DC machine?
The field winding is not used in the machine
The field winding is connected in series with the armature
The field winding is powered by a separate DC source
The field winding is connected in parallel with the armature
Correct answer
The field winding is not used in the machine
What is the relationship between torque and armature current in a DC motor?
Torque is directly proportional to the armature current
Torque is proportional to the square of the armature current
Torque is inversely proportional to the armature current
Torque is independent of the armature current
Correct answer
Torque is directly proportional to the armature current
A three-phase induction motor has a synchronous speed of 1800 rpm. If the slip is 5%, what is the rotor speed?
1800 rpm
1890 rpm
1710 rpm
90 rpm
Correct answer
1800 rpm
What is the term for the speed of the magnetic field rotating in the stator of an AC machine?
Rotor speed
Synchronous speed
Torque speed
Slip speed
Correct answer
Rotor speed
In a three-phase synchronous generator, what is the purpose of the prime mover?
To create the three-phase magnetic field in the stator
To supply DC power to the rotor windings
To rotate the DC-excited rotor
To regulate the output voltage and frequency
Correct answer
To create the three-phase magnetic field in the stator
What instrument is used to measure the potential difference between two points in an electric circuit?
Voltmeter
Wattmeter
Ohmmeter
Ammeter
Correct answer
Voltmeter
How should a voltmeter be connected to a circuit component to measure the voltage across it?
In series with the component
In a star configuration
In parallel with the component
In a delta configuration
Correct answer
In series with the component
How should an ammeter be connected to a circuit component to measure the current flowing through it?
In a star configuration
In parallel with the component
In series with the component
In a delta configuration
Correct answer
In a star configuration
An ammeter with an internal resistance of \(0.2~\Omega\) measures a current of \(1.5A\) in a circuit. If the circuit’s total resistance is known to be \(10\Omega\) (including the ammeter), what is the true current that would flow if the ammeter were ideal (zero resistance)?
Correct answer
A galvanometer with a resistance of 100 \(\Omega\) and a full-scale current of 1 mA is connected to a shunt resistor of 0. 01 \(\Omega\). What is the ammeter’s full-scale range?
100 A
1 A
10 A
Correct answer
100 A
A synchronous motor can be used to improve a lagging power factor when it is:
Under-excited
Over-excited
Running at low speed
Operating at its rated power
Correct answer
Under-excited
A load has an impedance of \(25\Omega\) and a resistance of \(20\Omega\). What is the power factor of the load?
1
Correct answer
A single-phase load draws a current of 50 A from a 220 V, 60 Hz supply at a power factor of 0. 7 lagging. What is the capacitance (in \(\mu F\)) of a parallel capacitor required to improve the power factor to 0. 9 lagging?
315 \(\mu F\)
226 \(\mu F\)
284 \(\mu F\)
150 \(\mu F\)
Correct answer
315 \(\mu F\)
A star-connected capacitor bank is used to improve the power factor of a load. The capacitance per phase is \(100 \mu F\). If the supply is \(400 V, 50 Hz\), what is the total reactive power (in kVAR) supplied by the bank?
75 kVAR
50 kVAR
5 kVAR
100 kVAR
Correct answer
75 kVAR
In a Delta (\(\Delta\)) connection, what is the phase difference between the line voltage and the phase voltage?
30\(^\circ\)
120\(^\circ\)
60\(^\circ\)
0\(^\circ\)
Correct answer
30\(^\circ\)
Which of the following statements is true regarding a balanced three-phase Delta (\(\Delta\)) connection?
The phase current is equal to the line current.
The line current is \(\sqrt{3}\) times the phase current.
The neutral current is zero.
The line voltage is \(\sqrt{3}\) times the phase voltage.
Correct answer
The phase current is equal to the line current.
A \(10 ext{kW}\), \(400 ext{V}\), \(3 ext{-phase}\) induction motor is started using a Star-Delta starter. The motor’s full-load current is \(18 ext{A}\). The DOL starting current is \(5\) times the full-load current. What is the starting current drawn from the supply in amperes when the motor is started in star mode?
\(60 ext{A}\)
\(30 ext{A}\)
\(18 ext{A}\)
\(90 ext{A}\)
Correct answer
\(60 ext{A}\)
A 400\(V\) distribution system has a transformer with a short-circuit impedance of \(5%\). The transformer rating is 1000\(kVA\). What is the short-circuit current at the transformer’s low voltage terminals in kiloamperes?
Correct answer
What is the key component used to detect the ’balanced’ state of a Wheatstone bridge?
A voltmeter
A battery
An ammeter
A galvanometer
Correct answer
A voltmeter
In a common electromechanical energy meter, which component rotates at a speed proportional to the power being consumed?
A braking magnet
A current coil
A voltage coil
An aluminum disc
Correct answer
A braking magnet
What is a common safety precaution to take when using a Megger?
Use the highest voltage setting possible.
Ensure no one is in contact with the conductors being tested
Wear metal gloves.
Stand on a metal ladder
Correct answer
Use the highest voltage setting possible.
Which protection scheme is generally used for the main protection of a generator?
Overcurrent protection
Differential protection
Under-frequency protection
Over-voltage protection
Correct answer
Overcurrent protection
A 20 MVA, 11 kV generator is protected by a percentage differential relay. The CT ratio is \(\frac{1000}{5}\). The relay has a pickup current of 0. 2 A. The generator is operating at 80% of its rated current. What is the minimum internal fault current in A that will operate the relay, assuming no restraint?
150 A
20 A
100 A
40 A
Correct answer
150 A
What is the standard characteristic impedance of a coaxial cable used for television and cable internet?
100 \(\Omega\)
50 \(\Omega\)
300 \(\Omega\)
75 \(\Omega\)
Correct answer
100 \(\Omega\)
If a coaxial cable has an attenuation of \(6 \text{ dB/100m}\), what is the signal loss over a \(200 \text{ meter}\) length of this cable?
\(2 \text{ dB}\)
\(12 \text{ dB}\)
\(3 \text{ dB}\)
\(6 \text{ dB}\)
Correct answer
\(2 \text{ dB}\)
A servomotor is primarily used for:
Uncontrolled, variable speed operation
Generating large amounts of power
Continuous high-speed rotation
Closed-loop feedback control of position and speed
Correct answer
Uncontrolled, variable speed operation
What is the typical power range for a fractional horsepower motor?
Greater than 1 horsepower
Less than 10 horsepower
Less than 1 horsepower
Between 1 and 5 horsepower
Correct answer
Greater than 1 horsepower
Which of the following is analogous to resistance in a magnetic circuit?
Magnetic Flux (\(\Phi\))
Permeability (\(\mu\))
Reluctance (R)
Magnetomotive Force (MMF)
Correct answer
Magnetic Flux (\(\Phi\))
The permeability of a material is the product of:
Magnetic flux density and magnetic field intensity
Permeability of free space and relative permeability
Magnetic flux and area
Relative permeability and magnetic field intensity
Correct answer
Magnetic flux density and magnetic field intensity
An air gap in a magnetic circuit will:
Decrease the total reluctance of the circuit
Decrease the MMF required to produce a given flux
Increase the fringing effect
Increase the magnetic flux density
Correct answer
Decrease the total reluctance of the circuit
An inductor with an inductance of 500mH and a resistance of 25\(\Omega\) is connected to a DC voltage source. What is the time constant (\(\tau\)) of the circuit?
2s
20s
Correct answer
An inductor with an inductance of \(10H\) has a current of \(5A\) flowing through it. If the current is decreased to \(2A\) in \(0.1s\), what is the average induced EMF in the inductor?
250V
75V
150V
300V
Correct answer
250V
Thevenin’s and Norton’s theorems are applicable only to which type of circuits?
Linear, bilateral circuits
Circuits with only dependent sources
Nonlinear circuits
Linear circuits
Correct answer
Linear, bilateral circuits
A circuit has a Thevenin equivalent voltage of \(10 V\) and a Thevenin equivalent resistance of \(2\Omega\). If a load of \(3\Omega\) is connected, what is the current flowing through the load?
5 A
2 A
7 A
10 A
Correct answer
5 A
What is the average value of a symmetrical sinusoidal waveform over one complete cycle?
\(\frac{V_{peak}}{\pi}\)
Zero
\(\frac{V_{peak}}{\sqrt{2}}\)
\(V_{peak}\)
Correct answer
\(\frac{V_{peak}}{\pi}\)
In a series RLC circuit, what happens to the inductive reactance (\(X_L\)) And capacitive reactance (\(X_C\)) As the frequency increases?
\(X_L\) decreases and \(X_C\) increases
\(X_L\) increases and \(X_C\) decreases
Both \(X_L\) and \(X_C\) decreases
Both \(X_L\) and \(X_C\) increases
Correct answer
\(X_L\) decreases and \(X_C\) increases
A balanced three-phase motor draws 50 A from a 415 V line. The power factor of the motor is 0. 8 lagging. What is the total reactive power drawn by the motor?
36 kVAR
Correct answer
An alternating current has a waveform such that it has a value of \(I_m\) for a duration of \(\frac{T}{4}\) and zero for a duration of of \(\frac{3T}{4}\) a full cycle. What is the r.m.s. value of this waveform?
\(\frac{I_m}{\sqrt{3}}\)
\(\frac{I_m}{\sqrt{2}}\)
\(\frac{I_m}{2}\)
\(0.25 \ I_m\)
Correct answer
\(\frac{I_m}{\sqrt{3}}\)
How does the Q-factor of a series RLC circuit relate to the circuit’s bandwidth and selectivity?
A higher Q-factor results in a wider bandwidth and higher selectivity
A higher Q-factor results in a narrower bandwidth and lower selectivity
A higher Q-factor results in a narrower bandwidth and higher selectivity
A higher Q-factor results in a wider bandwidth and lower selectivity
Correct answer
A higher Q-factor results in a wider bandwidth and higher selectivity
A parallel RLC circuit has a resistance of \(20 \Omega\), an inductive reactance of \(100 \Omega\), and a capacitive reactance of \(100 \Omega\). What is the total impedance of the circuit?
0 \(\Omega\)
20 \(\Omega\)
140 \(\Omega\)
10 \(\Omega\)
Correct answer
0 \(\Omega\)
A full-wave rectified sine wave has a peak value of 100 v. What is its average value?
Correct answer
An electroplating tank containing a zinc sulfate solution is used to deposit a \(5 \mu m\) thick layer of zinc on a metallic component with a surface area of \(0.1 m^2\). If the process takes \(20 minutes\), what is the current required? The density of zinc is \(7140 kg/m^3\), and the electrochemical equivalent of zinc is \(0.338 mg/C\).
Correct answer
An electric train with a mass of 100 tons is to accelerate from 20 km/h to 60 km/h in 20 seconds. If the train resistance is a constant 12 N/ton, what is the average tractive effort required during this period?
Correct answer
A three-phase transformer has a rating of \(200\) kVA. The line voltages are \(6.6\) kV on the primary and \(400\) V on the secondary. If the transformer is delta-connected on both sides, what is the phase current on the primary side?
\(5.8\) A
\(10.1\) A
\(17.5\) A
\(30.3\) A
Correct answer
\(5.8\) A
An ideal 50 kVA transformer has a voltage ratio of \(\frac{1000}{200}\) V. If the secondary winding has a load of 200 A, what is the current in the primary winding?
40 A
50 A
100 A
200 A
Correct answer
40 A
A 25 kVA, 2200/220 V, 50 Hz transformer has an efficiency of 98% at full load and 0. 8 power factor. The maximum efficiency occurs at 75% of the full load. What is the core loss of the transformer?
Correct answer
A 240 V d.c. shunt motor has a back EMF of 220 V. The armature resistance is 0. 5 \(\Omega\). What is the armature current?
20 A
40 A
30 A
50 A
Correct answer
20 A
A 220 V d.c. shunt motor has a back EMF of 200 V and a line current of 25 A. The field resistance is 100 \(\Omega\). What is the armature resistance?
Correct answer
A 4-pole, 500 V d.c. series generator with a wave-wound armature has 500 conductors. The armature and field resistances are 0. 1 \(\Omega\) and 0. 2 \(\Omega\) respectively. If the machine runs at 1200 rpm and delivers a full-load current of 60 A, what is the flux per pole? Assume the generator voltage is the same as the terminal voltage.
Correct answer
A 3-phase, 6-pole, 50 Hz induction motor runs at a slip of 2%. What is its rotor speed?
220 rpm
480 rpm
560 rpm
980 rpm
Correct answer
220 rpm
A 3-phase induction motor is running with a slip of 0. 03. If the synchronous speed is 1000 rpm, what is the rotor speed?
900 rpm
920 rpm
940 rpm
970 rpm
Correct answer
900 rpm
A 3-phase, 6-pole, 50 Hz induction motor has a rotor standstill resistance of \(0.2 , \Omega\) per phase and a rotor standstill reactance of \(1.0 , \Omega\) per phase. What is the rotor power factor at a speed of 950 RPM?
Correct answer
A 3-phase, 6-pole, 50 Hz alternator is synchronized to a busbar. What is its synchronous speed in rpm?
500 rpm
750 rpm
1000 rpm
1500 rpm
Correct answer
500 rpm
A permanent magnet DC servomotor is rated for a continuous torque of 1. 5 N\(\cdot\)m at 3000 RPM. If the motor efficiency is 85% at this operating point, what is the power input to the motor in watts?
471 W
554 W
558 W
875 W
Correct answer
471 W
A magnetic circuit consists of a core with a mean path length of 50 cm, a cross-sectional area of 10 \(cm^2\), and a relative permeability of 2500. A coil with 500 turns is wound around the core. What is the required current to generate a flux of 1. 5 \(\times 10^{-3}\) Wb in the core?
Correct answer
An industrial plant’s total load is 250 kVA at a power factor of 0. 7 lagging. If a 100 kVAR capacitor bank is installed, what is the new overall power factor of the plant?
Correct answer
A room of dimensions 12 m \(\times\) 10 m is to be illuminated to an average illuminance of 200 lux. The lamps have a luminous efficacy of 15 lm/W. If the utilization factor is 0. 6 and the depreciation factor is 0. 75, what is the total wattage of the lamps required?
3200 W
3556 W
4575 W
2490 W
Correct answer
3200 W
A Class-A power amplifier has a quiescent point at \(V_{CEQ}\) =10 V and \(I_{CQ}\) =250 mA. What is the maximum possible AC power output from the amplifier, assuming an ideal circuit and a sinusoidal signal?
Correct answer
A three-phase circuit breaker has a rated breaking capacity of \(40 \text{ kA}\) at \(33 \text{ kV}\). What is the symmetrical three-phase short-circuit MVA that the breaker can interrupt?
Correct answer
A MOSFET has a threshold voltage, \(V_{th}\) of \(1.5 V\). If the gate-to-source voltage \(V_{GS}\), is \(4 V\) and the drain current is \(5 mA\), what is the transconductance (\(g_m\)) of the transistor?
2 \(mS\)
3 \(mS\)
4 \(mS\)
5 \(mS\)
Correct answer
2 \(mS\)
A capacitor filter is used with a full-wave rectifier. The load current is 1 A, and the ripple voltage is 1 V (peak-to-peak). The input frequency is 60 Hz. What is the value of the filter capacitor?
2333 \(\mu\)F
4555 \(\mu\)F
6444 \(\mu\)F
8333 \(\mu\)F
Correct answer
2333 \(\mu\)F
An ideal half-wave rectifier is supplied with a sinusoidal voltage of \(10 V (rms)\). If a capacitor filter is added to the circuit, what is the maximum ripple voltage (peak-to-peak) for a load current of \(100 mA\) and a capacitance of \(1000 \mu F\)? The supply frequency is \(50 Hz\).
\(2.0 V\)
\(4.0 V\)
\(6.0 V\)
\(8.0 V\)
Correct answer
\(2.0 V\)
A voltage doubler circuit uses two capacitors of \(100 \mu F\) each and is supplied by a \(10 V (rms)\) AC source at \(50 Hz\). What is the approximate DC output voltage?
Correct answer
A hydroelectric power station is most suitable for:
Base loads
Intermittent loads
Continuous loads
Peak loads
Correct answer
Base loads
A factory has a load of 150 kW at a power factor of 0. 6 lagging. A capacitor is installed to improve the power factor to 0. 9 lagging. What is the required reactive power of the capacitor in kVAR?
Correct answer
A grounding grid for a substation is 30m times 30m with 5 conductors in each direction. What is the total length of the grid conductors (Lc)?
100 m
200 m
300 m
400 m
Correct answer
100 m
What is the primary cause of the Ferranti effect?
Line inductance
Short circuit current
Line capacitance
Line resistance
Correct answer
Line inductance
The skin effect in AC transmission lines is caused by:
The magnetic field produced by the AC current
The resistance of the conductor material
The distributed capacitance of the line
The high voltage of the line
Correct answer
The magnetic field produced by the AC current
The skin effect in AC transmission lines is caused by:
The magnetic field produced by the AC current
The resistance of the conductor material
The distributed capacitance of the line
The high voltage of the line
Correct answer
The magnetic field produced by the AC current
A 33 kV transmission line is operating at a constant voltage. The critical disruptive voltage for Corona is 21. 1 kV. What is the voltage factor, k=\(\frac{V}{Vc}\) ?
Correct answer
A 200 km long transmission line has a surge impedance of \(400\Omega\). What is the total characteristic impedance of the line?
\(200\Omega\)
\(400\Omega\)
\(600\Omega\)
\(800\Omega\)
Correct answer
\(200\Omega\)
How does increasing the outer conductor diameter (D) of a coaxial cable affect its characteristic impedance, assuming the inner diameter and dielectric constant remain constant?
It decreases
It remains constant
It increases
It is not affected by the diameter
Correct answer
It decreases
A galvanometer has a resistance of 50 \(\Omega\) and requires a current of 2 mA for full-scale deflection. What is the series resistance needed to convert it into a voltmeter of range 10 V?
2840 \(\Omega\)
4950 \(\Omega\)
6720 \(\Omega\)
8930 \(\Omega\)
Correct answer
2840 \(\Omega\)
A Megger indicates a resistance of 50 M\(\Omega\) when testing a cable at 1000 V. What is the leakage current?
20 \(\mu\)A
40 \(\mu\)A
60 \(\mu\)A
80 \(\mu\)A
Correct answer
20 \(\mu\)A
The correct expression for the sensitivity of a PMMC type instrument is:
\(\frac{R_m + R_s}{V}\)
\(\frac{R_m \times R_s}{V}\)
\(\frac{R_m + R_s}{V^2}\)
\(\frac{R_m \times R_s}{V^2}\)
Correct answer
\(\frac{R_m + R_s}{V}\)
Provisions applicable to medium, high or extra-high voltage installations have been discussed in:
IE rule 50
IE rule 54
IE rule 51
IE rule 55
Correct answer
IE rule 50
Which IE rule deals with the cables protected by bituminous materials?
IE rule 39
IE rule 30
IE rule 33
IE rule 73
Correct answer
IE rule 39
Formulate a solution for a network using Thevenin’s Theorem where two resistors \(6\Omega\) and \(3\Omega\) are in series with a \(9V\) battery, and a \(3\Omega\) load is connected across terminals. Find the load current.
1 A
Correct answer
Name the law which states that the total current entering a node in an electrical circuit is equal to the total current leaving that node.
Kirchhoff’s Voltage Law
Ohm’s Law
Kirchhoff’s Current Law
Faraday’s Law
Correct answer
Kirchhoff’s Voltage Law
Which theorem provides a method to find the equivalent current source of any linear circuit?
Thevenin’s
Norton’s
Superposition
Millman’s
Correct answer
Thevenin’s
The main function of a circuit breaker is to:
Carry current only
Break the circuit under fault conditions
Increase circuit current
Reduce supply voltage
Correct answer
Carry current only
Arc is produced in a circuit breaker because:
Current stops instantly
Contacts separate while carrying current
Circuit is open before current zero
Supply voltage is too low
Correct answer
Current stops instantly
Determine why a double earthing system is used in substations.
To increase voltage
To reduce resistance
To improve aesthetics
To reduce fault current
Correct answer
To increase voltage
The ratio of average demand to maximum demand is called:
Load factor
Capacity factor
Diversity factor
Demand factor
Correct answer
Load factor
The Ferranti effect is more pronounced when:
Line length increases
Line load increases
Voltage decreases
Power factor increases
Correct answer
Line length increases
A servomotor receives a position feedback signal. This is used to:
Increase voltage
Correct the error between actual and desired position
Change supply frequency
Reduce field current
Correct answer
Increase voltage
Which turbine is most suitable for high-head hydro plants?
Kaplan
Francis
Pelton
Cross-flow
Correct answer
Kaplan
If the friction in a rotating disc-type energy meter increases, the error causes:
Over-reading
Under-reading
No reading change
Random fluctuations
Correct answer
Over-reading
200 questions in the full paper