ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
What is the maximum voltage rating of low tension (L.T.) cables?
A)
11 kV
B)
33 kV
C)
1 kV
D)
66 kV
Option B is correct: 33 kV.
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
The Wheatstone bridge method is used for accurate measurement of:
A)
Very low resistance
B)
Medium resistance
C)
Very high resistance
D)
Only high voltage
Option B is correct: Medium resistance.
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
Which lighting is used for streets?
A)
Incandescent
B)
Sodium vapor lamp
C)
CFL
D)
Halogen
Correct answer: B — Sodium vapor lamp
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
Unit of illumination is:
A)
Lumen
B)
Candela
C)
Lux
D)
Watt
Correct answer: C — Lux
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
In conduit wiring, wires are drawn through:
A)
Wooden casing
B)
PVC/metal pipes
C)
Open air
D)
Insulators
Correct answer: B — PVC/metal pipes
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
A wire-wound resistor is usually used for:
A)
High-frequency applications
B)
High Power and Precision application
C)
As an open circuit
D)
Reducing voltage to zero
Option C is correct: As an open circuit.
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
What is the primary reason AC is preferred over DC for long-distance power transmission?
A)
AC is cheaper to generate.
B)
AC voltage can be easily stepped up or down using transformers.
C)
DC cannot be converted into AC.
D)
AC has constant polarity.
Correct answer: B — AC voltage can be easily stepped up or down using transformers.
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
Which instrument works on electromagnetic principle?
A)
Thermometer
B)
Moving iron instrument
C)
Barometer
D)
Hydrometer
Correct answer: B — Moving iron instrument
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
Which of the following is a “dry” type of primary cell?
A)
Lead Acid
B)
Daniel Cell
C)
Carbon-Zinc Cell
D)
Edison Cell
Correct answer: C — Carbon-Zinc Cell
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
The color of earth wire is:
A)
Red
B)
Black
C)
Blue
D)
Green
Correct answer: D — Green
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
What is the role of flux in soldering?
A)
Remove oxide layer
B)
Increase resistance
C)
Provide insulation
D)
Act as coolant
Option D is correct: Act as coolant.
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
Rubber is a:
A)
Conductor
B)
Insulator
C)
Semiconductor
D)
Metal
Correct answer: B — Insulator
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
The process of charging a battery converts:
A)
Chemical energy to heat
B)
Electrical energy to heat
C)
Electrical energy to chemical energy
D)
Mechanical energy to electrical
Correct answer: C — Electrical energy to chemical energy
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
Which organization sets standards for electrical tools in India?
A)
ISO
B)
BIS
C)
IEEE
D)
ANSI
Correct answer: B — BIS
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
An inductor opposes the change in current passing through it. This property is known as:
A)
Resistance
B)
Capacitance
C)
Self-inductance
D)
Mutual induction
Correct answer: C — Self-inductance
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
Which wiring system is most suitable for modern houses?
A)
Cleat wiring
B)
Concealed wiring
C)
Batten wiring
D)
Casing wiring
Correct answer: B — Concealed wiring
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
Which type of wiring is used for temporary installations?
A)
Conduit wiring
B)
Cleat wiring
C)
Batten wiring
D)
Casing-capping wiring
Option D is correct: Casing-capping wiring.
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
If the temperature of a copper conductor increases, its resistance will:
A)
Decrease
B)
Remain constant
C)
Increase
D)
Become zero
Option C is correct: Increase.
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
The ratio of active power to apparent power in an AC circuit is known as:
A)
Form factor
B)
Power factor
C)
Quality factor
D)
Demand factor
Correct answer: B — Power factor
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
Which electrolyte is used in an alkaline battery?
A)
Sulfuric acid
B)
Potassium hydroxide
C)
Ammonium chloride
D)
Sodium sulfate
Correct answer: B — Potassium hydroxide
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
Which type of cable is typically used for voltages up to 11 kV?
A)
Screened cables
B)
Belted cables
C)
Pressure cables
D)
None of the above
Option B is correct: Belted cables.
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
Which device is specifically used to protect against leakage of current?
A)
MCB
B)
Fuse
C)
ELCB (Earth Leakage Circuit Breaker)
D)
Contractor
Correct answer: C — ELCB (Earth Leakage Circuit Breaker)
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
The capacity of a battery is usually expressed in:
A)
Volts
B)
Ohms
C)
Ampere-hours (Ah)
D)
Watts
Correct answer: C — Ampere-hours (Ah)
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
The purpose of a distribution board is to:
A)
Generate power
B)
Store energy
C)
Distribute power to circuits
D)
Increase voltage
Correct answer: C — Distribute power to circuits
ITI Instructor • 2026 • Paper-III (Electrician - Technical Paper-I)
What is the primary function of a capacitor in a power supply circuit?
A)
Voltage regulation
B)
Smoothing (Filtering)
C)
Resistance heating
D)
Inductive coupling
Correct answer: B — Smoothing (Filtering)
