ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Which test checks dielectric strength of cable?
A)
Continuity test
B)
Insulation resistance test
C)
High voltage test
D)
Polarity test
Correct answer: C — High voltage test
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
What is the minimum number of earth terminals that should be there on a panel board?
A)
1
B)
2
C)
3
D)
4
Option B is correct: 2.
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Star connection gives:
A)
Low voltage
B)
High voltage
C)
Zero voltage
D)
Constant voltage
Correct answer: A — Low voltage
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Frequency of alternator depends on:
A)
Voltage
B)
Speed and poles
C)
Resistance
D)
Power
Correct answer: B — Speed and poles
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Direction of DC shunt motor can be changed by:
A)
Reverse polarity of Armature terminals only
B)
Reverse polarity of Field terminals only
C)
Both (a) & (b) are correct
D)
Both (a) & (b) are false
Option C is correct: Both (a) & (b) are correct.
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
5P10 Accuracy of a Current Transformer refers to _________.
A)
0.5% Accuracy upto 10A additional current
B)
5% Accuracy upto 10A additional current
C)
0.5% Accuracy upto 10 times rated current
D)
5% Accuracy upto 10 times rated current
Option B is correct: 5% Accuracy upto 10A additional current.
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Which lighting is preferred in industries for energy efficiency?
A)
Incandescent lamp
B)
Fluorescent lamp
C)
LED lighting
D)
Halogen lamp
Correct answer: C — LED lighting
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Hunting in synchronous motors is minimized by:
A)
Increasing excitation voltage
B)
Damper windings providing asynchronous torque
C)
Reducing load inertia
D)
Using salient-pole rotors only
Option A is correct: Increasing excitation voltage.
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Speed of a DC shunt motor is controlled below base speed by:
A)
Increasing supply voltage beyond rated value
B)
Field flux weakening using a diverter
C)
Short-circuiting the field winding partially
D)
Armature voltage control or resistance in armature circuit
Correct answer: D — Armature voltage control or resistance in armature circuit
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
No-load condition in series motor leads to:
A)
Safe operation
B)
High speed (dangerous)
C)
Low speed
D)
Zero speed
Correct answer: B — High speed (dangerous)
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Efficiency of a transformer is maximum when:
A)
Power factor is lagging
B)
Core losses are minimum
C)
Load is zero (no-load condition)
D)
Copper losses equal iron losses
Correct answer: D — Copper losses equal iron losses
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Continuity test in winding checks:
A)
Voltage
B)
Current
C)
Open circuit
D)
Power
Correct answer: C — Open circuit
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Efficiency of transformer is high because:
A)
No moving parts
B)
High speed
C)
Low voltage
D)
High resistance
Correct answer: A — No moving parts
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Which material is used for winding?
A)
Aluminium or copper
B)
Iron
C)
Steel
D)
Carbon
Correct answer: A — Aluminium or copper
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Which motor is used in mixer grinder?
A)
Induction motor
B)
Synchronous motor
C)
Universal motor
D)
Stepper motor
Correct answer: C — Universal motor
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Which electrical items are to be installed in the control panel?
A)
Switching & Indicator
B)
Bus bar & Protection
C)
Metering & Control
D)
All of the above
Option D is correct: All of the above.
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Tap changer is used to:
A)
Change current
B)
Change voltage
C)
Change frequency
D)
Change power
Correct answer: B — Change voltage
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Back EMF in motor:
A)
is zero
B)
opposes supply voltage
C)
increases current
D)
is same as supply
Correct answer: B — opposes supply voltage
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
According to IE rules, which part of the panel board should be earthed?
A)
All bus bars
B)
All live parts
C)
All metal parts
D)
All connectors
Option B is correct: All live parts.
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Which material is commonly applied over conductors for insulation?
A)
Enamel coating
B)
Galvanized coating
C)
PVC sheath
D)
Mica sheet
Option C is correct: PVC sheath.
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
The construction of a DC motor is identical to that of a DC generator except for:
A)
Use of salient poles exclusively in motors
B)
The direction of power flow and the role of back EMF
C)
Field windings being series type in generators only
D)
The presence of a commutator in motors only
Option B is correct: The direction of power flow and the role of back EMF.
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Series motor is used for:
A)
Fans
B)
Pumps
C)
Cranes
D)
Lights
Correct answer: C — Cranes
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
The unit of illumination is:
A)
Lumen
B)
Lux
C)
Candela
D)
Watt
Correct answer: B — Lux
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
A low Insulation Resistance reading during cable testing indicates:
A)
Good continuity
B)
Open circuit
C)
Correct polarity
D)
Leakage
Option A is correct: Good continuity.
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
NC in the context of relay is known as:
A)
No Contact
B)
Normally Closed
C)
Not Closed
D)
Normally Contact
Option D is correct: Normally Contact.
