ITI Instructor • 2026 • Paper-III (Workshop Calculation & Science - Technical Paper-I)
The diagonals of a square measures 10 cm, then the area is:
A)
10 cm2
B)
20 cm2
C)
50 cm2
D)
100 cm2
Option C is correct: 50 cm2.
ITI Instructor • 2026 • Paper-III (Workshop Calculation & Science - Technical Paper-I)
Find the area of a triangle whose base and height measures 8cm and 6cm respectively.
A)
24 cm2
B)
26 cm2
C)
20 cm2
D)
28 cm2
Option A is correct: 24 cm2.
ITI Instructor • 2026 • Paper-III (Workshop Calculation & Science - Technical Paper-I)
Find the curved surface area of a hollow cylinder whose height measures 21cm, outer radius is 6cm and inner radius is 4cm.
A)
1200 cm2
B)
1320 cm2
C)
1430 cm2
D)
1230 cm2
Option B is correct: 1320 cm2.
ITI Instructor • 2026 • Paper-III (Workshop Calculation & Science - Technical Paper-I)
The perimeter of a semi-circle of radius 21cm is:
A)
109 cm
B)
100 cm
C)
108 cm
D)
98 cm
Option C is correct: 108 cm.
ITI Instructor • 2026 • Paper-III (Workshop Calculation & Science - Technical Paper-I)
There are 480 students in a class. If 30% are girls, find the number of boys.
A)
300
B)
350
C)
336
D)
328
Option C is correct: 336.
ITI Instructor • 2026 • Paper-III (Workshop Calculation & Science - Technical Paper-I)
Where will the centre of gravity be of a uniform rod?
A)
at its end
B)
at its middle point
C)
at its centre of its cross sectional area
D)
depends upon its material
Option B is correct: at its middle point.
ITI Instructor • 2026 • Paper-III (Workshop Calculation & Science - Technical Paper-I)
Find the volume of a cylinder whose height and radius measures 12cm and 7cm respectively.
A)
1922 cm3
B)
1824 cm3
C)
1848 cm3
D)
2002 cm3
Option C is correct: 1848 cm3.
ITI Instructor • 2026 • Paper-III (Workshop Calculation & Science - Technical Paper-I)
SI unit of volume is :
A)
Litre
B)
Cubic meter
C)
Gallon
D)
Millilitre
Option B is correct: Cubic meter.
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
AC and DC generator produce ____ & ___ in their armature respectively.
A)
DC, DC
B)
AC, DC
C)
DC, AC
D)
AC, AC
Option C is correct: DC, AC.
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Ideal transformer has:
A)
Losses
B)
No losses
C)
Resistance
D)
Heat
Correct answer: B — No losses
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)
Induction motor works on:
A)
DC supply
B)
Electromagnetic induction
C)
Electrostatic force
D)
Chemical reaction
Correct answer: B — Electromagnetic induction
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Brushes are made of:
A)
Copper
B)
Carbon
C)
Aluminium
D)
Iron
Correct answer: B — Carbon
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
In a 3-phase induction motor, the rotating magnetic field is produced by:
A)
120° phase-displaced currents in stator windings
B)
Single-phase supply with auxiliary winding
C)
DC supply to rotor slip rings
D)
Mechanical rotation of the rotor at synchronous speed
Correct answer: A — 120° phase-displaced currents in stator windings
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Starter is used to:
A)
Increase voltage
B)
Limit starting current
C)
Increase speed
D)
Reduce torque
Correct answer: B — Limit starting current
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
The primary safety function of the earth wire in domestic appliances is to:
A)
Carry normal operating current back to the source
B)
Provide a low impedance path for fault current
C)
Act as a backup neutral when the neutral wire breaks
D)
Improve the power factor of inductive appliances like fans and motors
Correct answer: B — Provide a low impedance path for fault current
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Field winding produces:
A)
Voltage
B)
Current
C)
Magnetic field
D)
Resistance
Correct answer: C — Magnetic field
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
In DC motors, plugging is a method of:
A)
Speed increase
B)
Braking
C)
Field control
D)
Starting
Option A is correct: Speed increase.
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Blocking diode in solar circuit is used to prevent:
A)
Overcharging
B)
Short circuit
C)
Lightning strike
D)
Reverse current flow
Option B is correct: Short circuit.
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Eddy current loss is reduced by:
A)
Solid core
B)
Laminated core
C)
Copper core
D)
Air core
Correct answer: B — Laminated core
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
3-point starter controls:
A)
Voltage
B)
Current
C)
Speed
D)
Resistance
Correct answer: C — Speed
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
Rotor resistance starter is used only for:
A)
DC motors
B)
Synchronous motors
C)
Squirrel-cage motors
D)
Slip-ring induction motors
Correct answer: D — Slip-ring induction motors
ITI Instructor • 2026 • Paper-IV (Wireman - Technical Paper-II)
The basic principle of DC generator is:
A)
Electrostatic induction
B)
Electromagnetic induction
C)
Chemical reaction
D)
Thermal effect
Correct answer: B — Electromagnetic induction
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)
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
