Question for UPPSC Polytechnic Lecturer (Electrical) 2026 - Quiz / Questions / MCQ

Objective Questions

Latest UPPSC Polytechnic Lecturer Electrical Exam Question (Objective Questions), MCQ in English

Subjects : General Studies, Electrical

Question Bank UPPSC Polytechnic Lecturer (Electrical) Paper-2 Exam - English

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General Studies

Question 1Single Answer

Yojna a weekly journal

A
Ministry of Finance
B
Ministry of Information and Broadcastin
C
Ministry of Rural Development
D
Planning Commission

Question 2Single Answer

Kurukshetra a journal on rural development is published by

A
Ministry of Finance
B
Ministry of Information and Broadcastin
C
Ministry of Rural Development
D
Planning Commission

Question 3Single Answer

Devaluation of a currency means

A
Fixing the value of the currency in conjuction with the movement in the value of a basket of predetermined currencies
B
Reduction in the value of a currency vis-à-vis major internationally traded currencies
C
Fixing the value of currency in multilateral consultaion with the IMF the World Bank and major trading partners
D
Permitting the currency to seek its worth in the international market

Question 4Single Answer

In India rural incomes are generally lower than the urban incomes, which of the following reasons account for this
1. a large number of farmers are illiterate and know little about scientific agriculture
2. prices of primary products are lower than those of manufactured products
3. Investments in agriculture has been low when compared to investment in industry

A
1 and 3
B
2 and 3
C
1 and 2
D
1,2 and 3

Question 5Single Answer

Which of the following programmes aims at the promotion of savings among rural women

A
Rashtriya Mahila Kosh
B
Indira Mahila Yojna
C
Jawahar Rozgar Yojna
D
Mahila Samridhi Yojna

Question 6Single Answer

When Uttar Pradesh got it officially as statehood ?

A
24 January, 1950
B
26 January, 1952
C
1 January, 1956
D
18 February, 1957

Question 7Single Answer

How many districts are there in Uttar Pradesh

A
60
B
57
C
75
D
87

Question 8Single Answer

What are the official languages of Uttar Pradesh ?

A
Hindi & Urdu
B
Only Hindi
C
Only Urdu
D
Kumaoni

Question 9Single Answer

How many members of Lok Sabha from Uttar Pradesh ?

A
56
B
78
C
80
D
51

Question 10Single Answer

How many members of Rajya Sabha from Uttar Pradesh ?

A
45
B
51
C
31
D
77

Question 11Single Answer

What is the state flower of Uttar Pradesh ?

A
Lily
B
Rose
C
Palash
D
Sunflower

Question 12Single Answer

What is state sport of Uttar Pradesh ?

A
Field Hockey
B
Cricket
C
Football
D
Swimming

Question 13Single Answer

"Who said, 'India was a parrot unto itself'?

A
Malik Muhammad Joyce
B
Raskhan
C
Rich Khusrow
D
Rich Hasan

Question 14Single Answer

What was the real name of Amir Khusro?

A
Muhammad Hasan
B
Muhammad Hussain
C
Muhammad Khusrow
D
Muhammad Mine

Question 15Single Answer

When was the Constituent Assembly of India formed?

A
1946
B
1947
C
1948
D
1950

Question 16Single Answer

Who was the Chairman of the Drafting Committee of the Indian Constitution?

A
Dr. Rajendra Prasad
B
Dr. B.R. Ambedkar
C
Jawaharlal Nehru
D
Sardar Vallabhbhai Patel

Question 17Single Answer

Who is known as the "Father of the Indian Renaissance" ?

A
Raja Ram Mohan Roy
B
Swami Vivekananda
C
Rabindranath Tagore
D
Mahatma Gandhi

Question 18Single Answer

Which country's Supreme Leader, Ali Khamenei, was assassinated in a joint US-Israel strike in late February 2026?

A
Syria
B
Iraq
C
Lebanon
D
Iran

Question 19Single Answer

What was the primary goal stated for the 2026 Israeli–United States strikes on Iran?

A
Nuclear disarmament only
B
Border security
C
Economic sanctions enforcement
D
Regime change in Tehran

Question 20Single Answer

Which Indian state won its maiden Ranji Trophy title recently (reported in early March 2026)?

A
Mumbai
B
Tamil Nadu
C
Jammu & Kashmir
D
Karnataka

Question 21Single Answer

What funding amount did Germany announce for a new climate resilience initiative with India in February 2026?

A
EUR 10 million
B
EUR 100 million
C
EUR 50 million
D
EUR 20 million

Question 22Single Answer

Which Indian state launched its first Dark Sky Park in Kolli Hills in February 2026?

A
Kerala
B
Tamil Nadu
C
Uttarakhand
D
Himachal Pradesh

Question 23Single Answer

Who inaugurated three major inland waterways projects on National Waterway-2 in Assam in February 2026?

A
Nitin Gadkari
B
Jyotiraditya Scindia
C
Narendra Modi
D
Sarbananda Sonowal

Question 24Single Answer

Which event is scheduled for inauguration by PM Narendra Modi in March 2026 in Uttar Pradesh?

A
New Parliament building
B
Noida International Airport
C
Bullet train launch
D
Smart City project

Question 25Single Answer

In response to the assassination of Ali Khamenei, which group fired projectiles at northern Israel?

A
Hamas
B
IRGC
C
Houthis
D
Hezbollah

Electrical

Question 26Single Answer

What is the primary function of a chopper in a DC drive system?

A
To regulate AC voltage
B
To convert DC to AC
C
To control DC voltage by varying duty cycle
D
To step up AC voltage

Question 27Single Answer

Which type of chopper is used for regenerative braking in DC drives?

A
Step-up chopper
B
Step-down chopper
C
Two-quadrant chopper
D
Single-quadrant chopper

Question 28Single Answer

In a DC drive, what does the armature control method primarily regulate?

A
Field current
B
Armature voltage
C
Motor torque
D
Back EMF

Question 29Single Answer

What is the role of a freewheeling diode in a DC chopper circuit?

A
To increase voltage
B
To provide a path for inductor current during off-time
C
To block reverse current
D
To regulate frequency

Question 30Single Answer

Which power electronic device is commonly used in DC drives for speed control?

A
Diode
B
Thyristor
C
IGBT
D
BJT

Question 31Single Answer

What is the main advantage of using a PWM-based chopper in DC drives?

A
High power loss
B
Reduced harmonics and improved efficiency
C
Fixed frequency operation
D
Low voltage regulation

Question 32Single Answer

In a DC motor drive, how is speed increased above the base speed?

A
By reducing field current
B
By increasing armature voltage
C
By increasing load torque
D
By reducing armature resistance

Question 33Single Answer

What is the purpose of a cycloconverter in AC drives?

A
To convert DC to AC
B
To convert AC of one frequency to another
C
To regulate DC voltage
D
To step up AC voltage

Question 34Single Answer

Which type of AC drive is most suitable for high-power applications?

A
Voltage source inverter (VSI) drive
B
Cycloconverter drive
C
Current source inverter (CSI) drive
D
Matrix converter drive

Question 35Single Answer

What is the function of a V/f control in AC drives?

A
To maintain constant torque
B
To maintain constant flux
C
To reduce harmonics
D
To increase power factor

Question 36Single Answer

Which modulation technique is commonly used in AC drive inverters?

A
Amplitude modulation
B
Frequency modulation
C
Pulse width modulation (PWM)
D
Phase modulation

Question 37Single Answer

What happens if the V/f ratio is increased in an AC drive?

A
Motor overheats
B
Flux decreases
C
Torque increases
D
Speed decreases

Question 38Single Answer

Which component in an AC drive converts AC to DC?

A
Inverter
B
Rectifier
C
Chopper
D
Cycloconverter

Question 39Single Answer

What is the primary advantage of vector control in AC drives?

A
Simple implementation
B
Low cost
C
Precise torque and speed control
D
Fixed frequency operation

Question 40Single Answer

Which type of inverter is used in variable frequency drives (VFDs)?

A
Single-phase inverter
B
Three-phase inverter
C
Cycloconverter
D
Matrix converter

Question 41Single Answer

What is the effect of increasing the switching frequency in a PWM inverter?

A
Increased power loss
B
Reduced harmonics
C
Lower efficiency
D
Both a and b

Question 42Single Answer

Which type of AC motor is most commonly used with VFDs?

A
Synchronous motor
B
Induction motor
C
DC motor
D
Universal motor

Question 43Single Answer

What is the purpose of a snubber circuit in power electronics?

A
To increase voltage
B
To protect switching devices from voltage spikes
C
To regulate current
D
To reduce harmonics

Question 44Single Answer

In a DC drive, what happens when the field current is reduced?

A
Speed decreases
B
Torque increases
C
Speed increases
D
Back EMF decreases

Question 45Single Answer

Which control method is used for smooth speed control in AC drives?

A
Scalar control
B
Vector control
C
Direct torque control
D
Both b and c

Question 46Single Answer

What is an electric drive?

A
A system that converts electrical energy to mechanical energy
B
A system that converts mechanical energy to electrical energy
C
A system that regulates voltage
D
A system that controls current

Question 47Single Answer

Which type of drive is used for constant speed applications?

A
DC drive
B
AC drive
C
Synchronous drive
D
Servo drive

Question 48Single Answer

What is a group drive?

A
A single motor driving multiple loads
B
Multiple motors driving a single load
C
A motor with variable speed control
D
A motor with regenerative braking

Question 49Single Answer

Which type of drive is most suitable for precise position control?

A
DC drive
B
Servo drive
C
Induction drive
D
Synchronous drive

Question 50Single Answer

What is the main disadvantage of an individual drive?

A
High cost
B
Low efficiency
C
Poor speed control
D
High maintenance

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Electrical

Question 51Single Answer

In which quadrant does a motor operate during forward motoring?

A
First quadrant
B
Second quadrant
C
Third quadrant
D
Fourth quadrant

Question 52Single Answer

What is the operation in the second quadrant of a drive?

A
Forward motoring
B
Forward braking
C
Reverse motoring
D
Reverse braking

Question 53Single Answer

Which quadrant represents reverse motoring?

A
First quadrant
B
Second quadrant
C
Third quadrant
D
Fourth quadrant

Question 54Single Answer

What is required for four-quadrant operation of a drive?

A
Single-phase supply
B
Bidirectional power flow
C
Fixed frequency inverter
D
Constant torque load

Question 55Single Answer

Which type of braking is achieved by reversing the supply voltage?

A
Regenerative braking
B
Dynamic braking
C
Plugging
D
Mechanical braking

Question 56Single Answer

What is regenerative braking in electric drives?

A
Dissipating energy in resistors
B
Feeding energy back to the supply
C
Stopping the motor mechanically
D
Reducing motor speed by friction

Question 57Single Answer

Which braking method is most efficient for energy conservation?

A
Dynamic braking
B
Plugging
C
Regenerative braking
D
Mechanical braking

Question 58Single Answer

What is dynamic braking in a DC motor?

A
Reversing the armature voltage
B
Connecting a resistor across the armature
C
Feeding energy back to the supply
D
Reducing field current

Question 59Single Answer

Which motor is most suitable for plugging?

A
Induction motor
B
DC shunt motor
C
Synchronous motor
D
Stepper motor

Question 60Single Answer

What is the primary purpose of reversing a motor?

A
To increase speed
B
To change the direction of rotation
C
To reduce torque
D
To improve efficiency

Question 61Single Answer

How is reversing achieved in a DC motor?

A
By reversing the field or armature polarity
B
By increasing the supply voltage
C
By reducing the load torque
D
By changing the frequency

Question 62Single Answer

What is the effect of reversing the phase sequence in a three-phase induction motor?

A
Speed increases
B
Torque decreases
C
Direction of rotation reverses
D
Efficiency improves

Question 63Single Answer

Which factor is critical in estimating the power rating of a motor?

A
Load torque
B
Supply voltage
C
Motor efficiency
D
All of the above

Question 64Single Answer

What is the power rating of a motor proportional to?

A
Speed only
B
Torque only
C
Product of speed and torque
D
Supply frequency

Question 65Single Answer

Which type of load requires a high starting torque motor?

A
Fan load
B
Conveyor load
C
Pump load
D
Compressor load

Question 66Single Answer

What is the typical duty cycle considered for motor power rating?

A
Continuous duty
B
Intermittent duty
C
Short-time duty
D
All of the above

Question 67Single Answer

Which motor is commonly used in traction applications?

A
DC series motor
B
Induction motor
C
Synchronous motor
D
Stepper motor

Question 68Single Answer

Why is a DC series motor preferred for traction?

A
High starting torque
B
Constant speed
C
Low maintenance
D
High efficiency

Question 69Single Answer

Which characteristic is essential for traction motors?

A
Low starting torque
B
High overload capacity
C
Fixed speed operation
D
Low power rating

Question 70Single Answer

What is the role of a traction motor in electric locomotives?

A
To regulate voltage
B
To control braking
C
To provide mechanical power to wheels
D
To reduce harmonics

Question 71Single Answer

Which type of motor is used in modern electric traction systems?

A
DC shunt motor
B
Three-phase induction motor
C
Universal motor
D
Reluctance motor

Question 72Single Answer

What is the advantage of using AC motors in traction systems?

A
High maintenance
B
Robust and low maintenance
C
Low starting torque
D
Fixed speed operation

Question 73Single Answer

Which control method is used for traction motors in electric vehicles?

A
Scalar control
B
Vector control
C
Direct torque control
D
Both b and c

Question 74Single Answer

What is the primary challenge in traction motor design?

A
Low efficiency
B
High torque at low speeds
C
Fixed frequency operation
D
Low power rating

Question 75Single Answer

Which braking method is commonly used in traction systems?

A
Regenerative braking
B
Mechanical braking
C
Plugging
D
Dynamic braking

Question 76Single Answer

What is the effect of increasing the load torque on a traction motor?

A
Speed increases
B
Speed decreases
C
Efficiency improves
D
Power factor increases

Question 77Single Answer

Which type of drive is used in high-speed rail traction systems?

A
DC drive
B
Servo drive
C
AC drive
D
Stepper drive

Question 78Single Answer

What is the purpose of a gear system in traction motors?

A
To increase voltage
B
To match motor speed to wheel speed
C
To reduce torque
D
To improve power factor

Question 79Single Answer

Which factor affects the selection of a traction motor?

A
Load weight and speed requirements
B
Track length
C
Supply voltage only
D
Motor color

Question 80Single Answer

What is the typical power supply for traction motors in urban railways?

A
Single-phase AC
B
Three-phase AC
C
DC
D
Both b and c

Question 81Single Answer

Which type of motor is used in hybrid electric vehicles?

A
DC series motor
B
Permanent magnet synchronous motor
C
Induction motor
D
Both b and c

Question 82Single Answer

What is the role of an inverter in a traction drive?

A
To convert DC to AC
B
To convert AC to DC
C
To regulate voltage
D
To reduce harmonics

Question 83Single Answer

Which parameter is monitored for traction motor protection?

A
Motor temperature
B
Supply frequency
C
Track condition
D
Motor color

Question 84Single Answer

What is the effect of regenerative braking on a traction system?

A
Increased energy consumption
B
Reduced energy consumption
C
Increased motor wear
D
Reduced torque

Question 85Single Answer

Which type of load is typical for traction motors?

A
Constant torque load
B
Variable torque load
C
Constant power load
D
Both b and c

Question 86Single Answer

What is the significance of the torque-speed curve in traction motors?

A
To determine efficiency
B
To select the motor for specific applications
C
To regulate voltage
D
To reduce harmonics

Question 87Single Answer

Which type of cooling is used in traction motors?

A
Air cooling
B
Liquid cooling
C
Both a and b
D
No cooling required

Question 88Single Answer

What is the primary advantage of using IGBTs in traction drives?

A
Low cost
B
High switching speed and efficiency
C
Fixed frequency operation
D
Low power rating

Question 89Single Answer

Which control strategy is used for energy-efficient traction drives?

A
Scalar control
B
Field-oriented control
C
Direct torque control
D
Both b and c

Question 90Single Answer

What is the main challenge in regenerative braking for traction systems?

A
High cost of motors
B
Synchronization with the power supply
C
Low torque output
D
Fixed speed operation

Question 91Single Answer

Which of the following devices is a unidirectional switch?

A
Triac
B
Diac
C
SCR
D
UJT

Question 92Single Answer

Which device can be triggered by both positive and negative gate signals?

A
SCR
B
Triac
C
Diode
D
GTO

Question 93Single Answer

What is the main advantage of IGBT over MOSFET?

A
Higher switching speed
B
Lower conduction loss
C
Simpler gate drive
D
Higher voltage handling capability

Question 94Single Answer

Which of the following devices is a current-controlled device?

A
MOSFET
B
IGBT
C
BJT
D
SCR

Question 95Single Answer

In a power diode, reverse recovery time is the time taken to?

A
Turn on the diode
B
Turn off the diode
C
Recover forward conduction
D
Build up reverse voltage

Question 96Single Answer

Which device is known for its high input impedance and fast switching?

A
BJT
B
MOSFET
C
SCR
D
Triac

Question 97Single Answer

What is the function of a snubber circuit in power electronics?

A
Increase voltage
B
Decrease current
C
Protect devices from voltage spikes
D
Amplify signals

Question 98Single Answer

Which device is suitable for high-frequency applications?

A
SCR
B
Triac
C
MOSFET
D
GTO

Question 99Single Answer

What is the main characteristic of a unipolar device?

A
Uses both electrons and holes
B
Uses only electrons
C
Uses only holes
D
Uses no charge carriers

Question 100Single Answer

Which device is commonly used in light dimmer circuits?

A
Triac
B
SCR
C
Diode
D
BJT

Question 101Single Answer

What is the primary function of a GTO (Gate Turn-Off Thyristor)?

A
Conduct in both directions
B
Turn off using gate signal
C
Amplify signals
D
Store energy

Question 102Single Answer

In a thyristor, the holding current is?

A
The maximum current to keep it on
B
The current to turn it off
C
The minimum current to keep it on
D
The current to trigger it

Question 103Single Answer

Which device has a negative temperature coefficient?

A
BJT
B
MOSFET
C
Diode
D
SCR

Question 104Single Answer

What is the function of a freewheeling diode in a power circuit?

A
Block reverse voltage
B
Provide path for inductive load current
C
Increase voltage
D
Decrease current

Question 105Single Answer

Which device is known for its ability to handle large power levels?

A
BJT
B
MOSFET
C
IGBT
D
SCR

Question 106Single Answer

In a power BJT, the saturation region is characterized by?

A
High voltage, low current
B
Low voltage, high current
C
High voltage, high current
D
Low voltage, low current

Question 107Single Answer

Which device combines the advantages of BJT and MOSFET?

A
SCR
B
Triac
C
IGBT
D
GTO

Question 108Single Answer

What is the main disadvantage of a thyristor?

A
Slow switching speed
B
High cost
C
Complex gate drive
D
Low voltage rating

Question 109Single Answer

Which device is suitable for AC power control?

A
Diode
B
BJT
C
Triac
D
MOSFET

Question 110Single Answer

What is the function of a heat sink in power devices?

A
Increase voltage
B
Decrease current
C
Dissipate heat
D
Amplify signals

Question 111Single Answer

Which device is triggered by voltage?

A
BJT
B
MOSFET
C
SCR
D
GTO

Question 112Single Answer

Which of the following devices can conduct current in both directions and is triggered in both directions?

A
SCR
B
GTO
C
Diode
D
Triac

Question 113Single Answer

What is the purpose of a triggering circuit in a thyristor-based power control system?

A
To block the thyristor
B
To increase voltage
C
To control the turning on of the thyristor
D
To reduce current

Question 114Single Answer

A half-controlled rectifier consists of:

A
All diodes
B
Both diodes and thyristors
C
All thyristors
D
Diodes and MOSFETs

Question 115Single Answer

Which waveforms are typically used in firing circuits of SCRs?

A
Sine wave
B
Square wave
C
Ramp or pulse signals
D
DC voltage

Question 116Single Answer

A full-controlled rectifier with resistive load provides:

A
Half-wave output
B
Full-wave output
C
Pulsating DC
D
AC output

Question 117Single Answer

Which component is essential in a triggering circuit to provide phase control?

A
Capacitor
B
Zener diode
C
Diac
D
Transformer

Question 118Single Answer

What is the main use of a smoothing circuit in a rectifier?

A
To reduce AC input
B
To increase voltage
C
To reduce ripple in DC output
D
To increase current

Question 119Single Answer

What is the typical configuration of a single-phase half-wave controlled rectifier?

A
One SCR and one diode
B
One SCR only
C
Two SCRs
D
Two diodes

Question 120Single Answer

Which rectifier circuit offers the highest output voltage?

A
Half-wave
B
Full-wave center-tap
C
Bridge
D
Zener regulated

Question 121Single Answer

Which device is often used to isolate triggering pulses from the control circuit?

A
Capacitor
B
Opto-isolator
C
Transistor
D
Relay

Question 122Single Answer

Why is a filter used after a rectifier?

A
To block AC
B
To allow only ripples
C
To convert pulsating DC to smooth DC
D
To regulate voltage

Question 123Single Answer

Which of the following is a line-commutated converter?

A
Chopper
B
Inverter
C
AC voltage controller
D
SCR-based controlled rectifier

Question 124Single Answer

The firing angle in a phase-controlled rectifier controls:

A
Output current
B
Output voltage
C
Frequency
D
Output resistance

Question 125Single Answer

Which rectifier has minimum ripple factor?

A
Half-wave
B
Full-wave
C
Bridge
D
Full-wave with filter

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