ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Transmission lines use:
A)
Copper only
B)
Aluminium conductors
C)
Iron wires
D)
PVC cables
Correct answer: B — Aluminium conductors
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
A solar cell is basically a diode and it requires:
A)
No Bias
B)
Positive Bias
C)
Negative Bias
D)
Any Non-Zero Bias
Option B is correct: Positive Bias.
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
BIS stands for:
A)
Bureau of Indian Systems
B)
Bureau of Indian Standards
C)
Bureau of Indian Schedules
D)
Bureau of International Standards
Option B is correct: Bureau of Indian Standards.
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Which of the following is not true for maintenance of Lead acid batteries?
A)
Should not be kept in deep discharge condition for a long time
B)
Discharged battery should not be test with high rate discharge tester
C)
Avoid charging at high rate
D)
Unused for long time should not be put on trickle charge.
Option B is correct: Discharged battery should not be test with high rate discharge tester.
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Current in open circuit is:
A)
Maximum
B)
Zero
C)
Infinite
D)
Constant
Correct answer: B — Zero
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Busbar in distribution board is used for:
A)
Insulation
B)
Distribution of power
C)
Cooling
D)
Measurement
Correct answer: B — Distribution of power
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
In a solar cell, light energy is absorbed in the form of:
A)
Photons
B)
Waves
C)
Heat
D)
Electrons
Option B is correct: Waves.
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Statement I : CFL Lamp has dedicated heat sink. Statement II : Phosphor coating is part of CFL Lamp.
A)
Both statements are True
B)
Both statements are False
C)
Statement-I is False and Statement-II is True
D)
Statement-I is True and Statement-II is False
Correct answer: C — Statement-I is False and Statement-II is True
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Overcharging of battery causes:
A)
Cooling
B)
Heating & gassing
C)
Increased life
D)
No effect
Correct answer: B — Heating & gassing
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Overheating during soldering causes:
A)
Strong joint
B)
Damage to insulation
C)
Better conductivity
D)
No effect
Correct answer: B — Damage to insulation
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Common solder is made of:
A)
Copper & zinc
B)
Tin & lead
C)
Aluminium & iron
D)
Steel & carbon
Correct answer: B — Tin & lead
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Kirchoff’s second law states that in a closed circuit, sum of all voltages equals:
A)
Zero
B)
Unity
C)
Sum of all Applied Voltage
D)
None of the above
Option B is correct: Unity.
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
LED current must be controlled using:
A)
Capacitor
B)
Inductor
C)
Resistor/driver
D)
Transformer
Correct answer: C — Resistor/driver
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Statement I : Solid State Lighting is a lighting that uses LED. Statement II : Solid State Lighting requires Filaments.
A)
Both statements are True
B)
Both statements are False
C)
Statement-I is False and Statement-II is True
D)
Statement-I is True and Statement-II is False
Correct answer: D — Statement-I is True and Statement-II is False
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
CFL contains:
A)
Lead
B)
Mercury vapour
C)
Copper
D)
Silicon
Correct answer: B — Mercury vapour
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Earthing resistance should be:
A)
High
B)
Low
C)
Infinite
D)
Zero
Correct answer: B — Low
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Efficiency of transmission line increases with:
A)
High current
B)
High voltage
C)
High resistance
D)
Low voltage
Correct answer: B — High voltage
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Capacity of a storage cell is expressed in :
A)
Watt Hour
B)
Kilowatt Hour
C)
Kilowatt peak
D)
Ampere Hour
Option D is correct: Ampere Hour.
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
MRI works on principle of:
A)
Resistance
B)
Magnetic resonance
C)
Heat
D)
Voltage
Correct answer: B — Magnetic resonance
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
In a Delta-Star Distribution Transformer, Earthing is usually done at:
A)
Delta Point
B)
Star Point
C)
Both (a) & (b)
D)
None of these
Option C is correct: Both (a) & (b).
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Rectifier converts:
A)
DC to AC
B)
AC to DC
C)
Voltage to current
D)
Power to energy
Correct answer: B — AC to DC
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Instrument used to measure resistance:
A)
Ammeter
B)
Voltmeter
C)
Ohmmeter
D)
Wattmeter
Correct answer: C — Ohmmeter
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Zener Diode is designed to operate in:
A)
Forward Bias
B)
No Bias
C)
Breakdown Region
D)
None of the Above
Option B is correct: No Bias.
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Zener diode is used for:
A)
Amplification
B)
Rectification
C)
Voltage regulation
D)
Heating
Correct answer: C — Voltage regulation
ITI Instructor • 2026 • Paper-III (Wireman - Technical Paper-I)
Instrument used to measure electric current is:
A)
Ammeter
B)
Voltmeter
C)
Tester
D)
Meggar
Correct answer: A — Ammeter
