ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Transformer is used to:
A)
Change frequency
B)
Change power
C)
Change voltage level
D)
Store energy
Correct answer: C — Change voltage level
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
A diode allows current to flow in:
A)
Both directions
B)
No direction
C)
One direction only
D)
Reverse direction
Option B is correct: No direction.
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Electric fan works on:
A)
Heating effect
B)
Chemical effect
C)
Magnetic effect
D)
Optical effect
Option C is correct: Magnetic effect.
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
A transistor is used for:
A)
Heating
B)
Amplification and switching
C)
Cooling
D)
Lighting
Option C is correct: Cooling.
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
Oscilloscope is used to measure:
A)
Resistance
B)
Power
C)
Waveform of signals
D)
Temperature
Option B is correct: Power.
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
A transformer works on the principle of:
A)
Self induction
B)
Mutual induction
C)
Capacitance
D)
Resistance
Correct answer: B — Mutual induction
ITI Instructor • 2026 • Paper-IV (Electrician - Technical Paper-II)
The transformation ratio is defined as:
A)
Current ratio
B)
Power ratio
C)
Voltage ratio
D)
Resistance ratio
Correct answer: C — Voltage ratio
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Insulation resistance should be:
A)
Low
B)
High
C)
Zero
D)
Medium
Correct answer: B — High
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
CT is used to measure:
A)
Voltage
B)
Current
C)
Power
D)
Frequency
Correct answer: B — Current
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
What is the safest method to rescue a person in contact with a live conductor?
A)
Pull the person directly
B)
Use a wet cloth
C)
Use a dry insulating object
D)
Pour water
Correct answer: C — Use a dry insulating object
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
In a series battery connection:
A)
Voltage increases
B)
Current increases
C)
Resistance decreases
D)
Capacity increases
Correct answer: A — Voltage increases
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
The fullwave bridge rectifier requires a total of ________ diodes.
A)
2
B)
4
C)
6
D)
8
Option B is correct: 4.
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Output of a solar cell is:
A)
AC
B)
DC
C)
Pulsating AC
D)
High frequency
Correct answer: B — DC
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
In Hydro-power Generating Station, Penstock is used to:
A)
Carry Water to Turbine
B)
Control flow of water
C)
Spill excess water
D)
Measure Water flow rate
Option B is correct: Control flow of water.
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Solar cell works on the principle of:
A)
Thermoelectric effect
B)
Photoelectric effect
C)
Magnetic effect
D)
Chemical reaction
Correct answer: B — Photoelectric effect
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Which type of capacitor is called polarized capacitor?
A)
Ceramic Capacitor
B)
Paper Capacitor
C)
Electrolytic Capacitor
D)
All of the above
Option A is correct: Ceramic Capacitor.
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Class D fire indicates:
A)
Metals
B)
Electrical equipment
C)
Liquifiable gas
D)
Wood
Option A is correct: Metals.
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
White/Blue Light Emitting Diode are mostly made of:
A)
Tungsten
B)
Silicon Carbide
C)
Silicon Arsenic
D)
Gallium Nitride
Correct answer: D — Gallium Nitride
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
In a series circuit, current is:
A)
Different
B)
Same
C)
Zero
D)
Infinite
Correct answer: B — Same
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Circuit breaker operates during:
A)
Normal condition
B)
Fault condition
C)
No load
D)
Charging
Correct answer: B — Fault condition
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
In a 3 phase power supply, each subsequent phase differs by how many degree?
A)
60
B)
120
C)
180
D)
200
Option C is correct: 180.
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Which of the following is an electrical device that connects or isolates electrical circuits?
A)
Insulator
B)
Lightning Arrestor
C)
Circuit Breaker
D)
None of the above
Option B is correct: Lightning Arrestor.
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
In a 3-phase system, when loads are perfectly balanced, the neutral current is:
A)
Equals to phase current
B)
Cannot be determined
C)
1/3rd of Phase current
D)
Zero
Option A is correct: Equals to phase current.
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
What is the colour code of warning signals?
A)
White Border-Red Background-Symbol
B)
Black Border-Yellow Background-Symbol
C)
Yellow Background with Symbol
D)
Red background with Symbol
Option C is correct: Yellow Background with Symbol.
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Secondary distribution voltage is:
A)
132 kV
B)
33 kV
C)
415/230 V
D)
11 kV
Correct answer: C — 415/230 V
