ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
XLPE insulated cables are preferred over PVC in many industrial applications because they offer:
A)
Lower current carrying capacity
B)
Higher temperature tolerance and better moisture/chemical resistance
C)
Lower cost only
D)
Poorer mechanical strength
Option C is correct: Lower cost only.
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Which type of wiring is most suitable for a heavy industrial workshop?
A)
Cleat wiring
B)
Casing and capping
C)
Conduit wiring
D)
Batten wiring
Correct answer: C — Conduit wiring
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Which method is used for locating cable faults?
A)
Loop test
B)
Megger test
C)
Voltage drop test
D)
Load test
Correct answer: A — Loop test
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Continuity test of motor winding is performed using:
A)
Megger
B)
Growler only
C)
Voltmeter in series
D)
Multimeter
Option B is correct: Growler only.
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Which lamp requires a choke (ballast) and starter for proper operation?
A)
Pure halogen lamp
B)
LED lamp
C)
Incandescent lamp
D)
Fluorescent tube
Option A is correct: Pure halogen lamp.
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Which device converts DC from solar panels to AC?
A)
Transformer
B)
Rectifier
C)
Inverter
D)
Stabilizer
Correct answer: C — Inverter
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Transformer rating is in:
A)
kWA
B)
kVA
C)
kV
D)
kW
Correct answer: B — kVA
ITI Instructor • 2026 • Paper-IV (Technical Paper-II)
Thermal conductivity is highest in:
A)
Rubber
B)
Wood
C)
Metals
D)
Plastic
Option B is correct: Wood.
ITI Instructor • 2026 • Paper-IV (Technical Paper-II)
In solids, heat transfer mainly occurs by:
A)
Convection
B)
Radiation
C)
Diffusion
D)
Conduction
Option D is correct: Conduction.
ITI Instructor • 2026 • Paper-IV (Technical Paper-II)
Friction does negative work because it:
A)
acts upward
B)
opposes motion
C)
acts downward
D)
is zero
Option B is correct: opposes motion.
ITI Instructor • 2026 • Paper-IV (Technical Paper-II)
Which defect weakens timber the most?
A)
Knot
B)
Warp
C)
Crack
D)
Shrinkage
Option D is correct: Shrinkage.
ITI Instructor • 2026 • Paper-IV (Technical Paper-II)
Steel is an alloy of:
A)
Iron and carbon
B)
Copper and zinc
C)
Aluminium and iron
D)
Iron and silicon
Option C is correct: Aluminium and iron.
ITI Instructor • 2026 • Paper-IV (Technical Paper-II)
In an ideal machine:
A)
Efficiency = 0%
B)
Efficiency = 50%
C)
Efficiency = 100%
D)
Efficiency > 100%
Option C is correct: Efficiency = 100%.
ITI Instructor • 2026 • Paper-IV (Technical Paper-II)
If velocity doubles, kinetic energy becomes:
A)
Four times
B)
Double
C)
Same
D)
Half
Option A is correct: Four times.
ITI Instructor • 2026 • Paper-IV (Technical Paper-II)
Which wire has the highest resistance?
A)
Thick wire
B)
Thin wire
C)
Short wire
D)
Copper wire
Option B is correct: Thin wire.
ITI Instructor • 2026 • Paper-IV (Technical Paper-II)
One kilowatt-hour (kWh) is equal to:
A)
3.6 × 106 J
B)
1000 J
C)
360 J
D)
106 J
Option A is correct: 3.6 × 106 J.
ITI Instructor • 2026 • Paper-IV (Technical Paper-II)
A machine has an efficiency of 60%. If the input energy is 500 J, what is the output energy?
A)
200 J
B)
300 J
C)
400 J
D)
250 J
Option D is correct: 250 J.
ITI Instructor • 2026 • Paper-IV (Technical Paper-II)
The SI unit of latent heat is:
A)
J/kgK
B)
W/mK
C)
J/kg
D)
Cal
Option C is correct: J/kg.
ITI Instructor • 2026 • Paper-IV (Technical Paper-II)
Which is the most ductile metal?
A)
Iron
B)
Copper
C)
Gold
D)
Aluminium
Option A is correct: Iron.
ITI Instructor • 2026 • Paper-IV (Technical Paper-II)
Which of the following is a first-class lever?
A)
Wheelbarrow
B)
Tweezers
C)
Seesaw
D)
Nutcracker
Option C is correct: Seesaw.
ITI Instructor • 2026 • Paper-IV (Technical Paper-II)
A body of mass 2 kg is moving with velocity 3 m/s. What is its kinetic energy?
A)
3 J
B)
9 J
C)
6 J
D)
12 J
Option B is correct: 9 J.
ITI Instructor • 2026 • Paper-IV (Technical Paper-II)
Effort arm is the distance between:
A)
Load and fulcrum
B)
Load and effort
C)
Effort and fulcrum
D)
None of these
Option C is correct: Effort and fulcrum.
ITI Instructor • 2026 • Paper-IV (Technical Paper-II)
Three resistors of 6 each in parallel have equivalent resistance:
A)
2
B)
3
C)
6
D)
18
Option A is correct: 2 .
ITI Instructor • 2026 • Paper-IV (Technical Paper-II)
Which of the following processes involves no temperature change?
A)
Heating water
B)
Cooling air
C)
Increasing pressure
D)
Change of state
Option D is correct: Change of state.
ITI Instructor • 2026 • Paper-IV (Technical Paper-II)
Which of the following is NOT a mode of heat transfer?
A)
Conduction
B)
Convection
C)
Radiation
D)
Reflection
Option D is correct: Reflection.
