ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Which winding is used for high current applications?
A)
Wave winding
B)
Lap winding
C)
Series winding
D)
Random winding
Correct answer: B — Lap winding
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
The winding pitch is defined as:
A)
Number of coils
B)
Number of slots
C)
Distance between two sides of a coil
D)
Length of wire
Correct answer: C — Distance between two sides of a coil
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Synchronous motor runs at:
A)
Variable speed
B)
Constant speed
C)
Zero speed
D)
Half speed
Correct answer: B — Constant speed
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Which fault occurs due to insulation failure between turns?
A)
Open circuit
B)
Short circuit
C)
Ground fault
D)
Overload
Correct answer: B — Short circuit
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Which circuit breaker has fastest operation?
A)
Oil CB
B)
Air CB
C)
SF CB
D)
Vacuum CB
Correct answer: D — Vacuum CB
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
A relay is used to:
A)
Store current
B)
Detect faults and operate circuit breaker
C)
Increase voltage
D)
Reduce resistance
Correct answer: B — Detect faults and operate circuit breaker
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Non-conventional energy sources include:
A)
Coal
B)
Petroleum
C)
Wind and solar
D)
Gas
Correct answer: C — Wind and solar
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Arc quenching means:
A)
Increasing arc
B)
Extinguishing the arc
C)
Producing arc
D)
Measuring arc
Correct answer: B — Extinguishing the arc
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Generated EMF is proportional to speed. If speed increases from 1000 rpm to 1500 rpm, EMF becomes:
A)
Same
B)
Half
C)
1.5 times
D)
Double
With flux constant, generated EMF is proportional to speed, so 1500/1000 = 1.5 times.
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
A DC motor runs at 1000 rpm. If flux is reduced by 20%, new speed is approximately:
A)
800 rpm
B)
900 rpm
C)
1250 rpm
D)
1000 rpm
With flux reduced to 80%, DC motor speed is approximately inversely proportional to flux, so speed rises to 1000/0.8 = 1250 rpm.
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Which of the following is a conventional energy source?
A)
Solar
B)
Wind
C)
Coal
D)
Tidal
Option B is correct: Wind.
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
A DC generator works on the principle of:
A)
Electrolysis
B)
Heating effect
C)
Electromagnetic induction
D)
Capacitance
Correct answer: C — Electromagnetic induction
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Neutral wire is usually of color:
A)
Red
B)
Green
C)
Black/Blue
D)
Yellow
Option C is correct: Black/Blue.
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
The main purpose of neutral wire in a domestic circuit is to:
A)
Carry high voltage
B)
Provide protection
C)
Complete the circuit
D)
Increase current
Option C is correct: Complete the circuit.
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Induction motor slip is defined as:
A)
Voltage difference
B)
Difference between synchronous speed and rotor speed
C)
Current difference
D)
Power loss
Correct answer: B — Difference between synchronous speed and rotor speed
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Slip in induction motor depends on:
A)
Voltage
B)
Frequency
C)
Load
D)
Power
Option A is correct: Voltage.
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
In AC machines, the armature winding is usually placed in:
A)
Rotor
B)
Stator
C)
Field poles
D)
Commutator
Correct answer: B — Stator
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Concentrated winding means:
A)
Coils spread in many slots
B)
Coils placed in one slot per pole per phase
C)
Random placement
D)
No winding
Correct answer: B — Coils placed in one slot per pole per phase
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Torque in DC motor is proportional to:
A)
Voltage
B)
Speed
C)
Flux × armature current
D)
Resistance
Correct answer: C — Flux × armature current
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Transmission of electrical power in bulk is done at:
A)
Low voltage
B)
Medium voltage
C)
High voltage
D)
Zero voltage
Correct answer: C — High voltage
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Which starter is used for induction motor?
A)
Three-point starter
B)
Star-delta starter
C)
Rheostat
D)
Battery
Correct answer: B — Star-delta starter
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Continuity test is used to check:
A)
Voltage
B)
Current
C)
Break in winding
D)
Power
Correct answer: C — Break in winding
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Which application uses VVVF drives?
A)
Heaters
B)
Elevators
C)
Lamps
D)
Batteries
Option B is correct: Elevators.
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
A 3-phase alternator has 36 slots and 4 poles. Slots per pole =
A)
6
B)
9
C)
12
D)
18
Slots per pole = 36/4 = 9.
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Which power plant has highest initial cost?
A)
Thermal
B)
Diesel
C)
Hydel
D)
Gas
Correct answer: C — Hydel
