Quiz Questions

ITI Quiz - 05-May-2026 03:42 PM (ITISKILL0690OE)

Q-Paper A-Paper
Question 1 1 Marks
Which instrument is used for measuring
heat?
A
Thermometer
B
Anemometer
C
Calorimeter
D
Ammeter
Question 2 1 Marks
Which factors produce work?
A
Force and distance
B
Time and distance
C
Force and power
D
Force and time
Question 3 1 Marks
What is the barometer reading at sea level in Hg column?
A
760 mm
B
750 mm
C
740 mm
D
730 mm
Question 4 1 Marks
What is the atmospheric pressure at sea
level?
A
1.033 kg/cm<sup>2</sup>
B
1.3 Kg/cm<sup>2</sup>
C
1.5 Kg/cm<sup>2</sup>
D
1.6 Kg/cm<sup>2</sup>
Question 5 1 Marks
What is the rate of doing work?
A
Duty
B
Force
C
Power
D
Velocity
Question 6 1 Marks
What is the unit of heat in M.K.S system?
A
B.T.U (British thermal unit)
B
K.Cal (Kilo Calorie)
C
KV (Kilo Volt)
D
K.W (Kilo Watt)
Question 7 1 Marks
What is the absolute zero temperature in
degree centigrade?
A
0 Degree Centigrade
B
100 Degree Centigrade
C
-273 Degree Centigrade
D
212 Degree Centigrade
Question 8 1 Marks
What is bottom dead centre in reciprocating compressor cylinder?
A
The piston moves up from the point of cylinder
B
The piston stops in cylinder at top
C
The piston moves down from the point of cylinder
D
The piston starts in cylinder at top
Question 9 1 Marks
Which components maintain the pressure difference in RAC system?
A
Condenser and filter
B
Evaporator and motor
C
Receiver and condenser
D
Compressor and expansion device
Question 10 1 Marks
What is the melting temperature of silver
brazing rod?
A
1120 Degree F
B
1200 Degree F
C
1250 Degree F
D
1300 Degree F
Question 11 1 Marks
Which lubricant oil is used in swash plate of R 134a compressor?
A
Servo 20
B
POE
C
SAE - 40
D
Mineral oil
Question 12 1 Marks
How the difference between the
synchronous speed and the actual rotor speed is
specified?
A
Lead
B
Lag
C
Slip
D
Trip
Question 13 1 Marks
What is the reason for poor compression?
A
Less clearance volume
B
Scratches on the piston surface
C
Lapped valve plate and reed seat
D
Good lubrication on the moving parts
Question 14 1 Marks
Which is disconnected by centrifugal switch is RSIR motor?
A
Running winding
B
Common winding
C
Starting winding
D
Running capacitor
Question 15 1 Marks
Which cooling medium is used to cool the motor of a hermetic reciprocating compressor in AC?
A
Discharge vapour
B
Liquid refrigerant
C
Suction vapour
D
Water
Question 16 1 Marks
Which instrument is used to identify the
terminals of a compressor motor?
A
Ammeter
B
Voltmeter
C
Ohm meter
D
Anemometer
Question 17 1 Marks
Which motor has the least starting
torque?
A
CSIR
B
CSR
C
RSIR
D
PSC
Question 18 1 Marks
Which movement of the scroll compresses the low pressure vapour in scroll compressor?
A
Reciprocating
B
Centrifugal
C
Rotating
D
Orbital
Question 19 1 Marks
Which is a positive displacement
compressor?
A
Centrifugal compressor
B
Scroll compressor
C
Water pump
D
Oil pump
Question 20 1 Marks
What is the effect of moist air present inside the hermetic system?
A
Capacity of compressor will increase
B
Less wear and tear in compressor
C
Harmful to the compressor and motor
D
Increase the life of compressor
Question 21 1 Marks
Which movement of plunger energises the start winding in relay operation?
A
Vertically up
B
Bottom side
C
Vertically down
D
Horizontally left
Question 22 1 Marks
What is the cause for refrigerator door gap at closing position?
A
Uneven floor level
B
Either side gap more
C
Either side gap less
D
Uneven condenser level
Question 23 1 Marks
Which component actuates the defrost cycle in frost free refrigerator?
A
Bimetal thermo
B
Defrost heater
C
Timer
D
Relay
Question 24 1 Marks
Which device equalizes the system pressure in frost free refrigerator?
A
Capillary tube
B
Compressor
C
Condenser
D
Evaporator
Question 25 1 Marks
What is the working condition of component during defrost cycle in frost free refrigerator?
A
Evaporator fan motor is running
B
Compressor is not running
C
Thermostat cuts off
D
Relay activated
Question 26 1 Marks
Which component is replaced to prevent air entering the refrigerator cabinet?
A
Thermostat
B
Door gasket
C
Door paint
D
Door hinges
Question 27 1 Marks
Where the thermal bulb is fixed in frost free refrigerator?
A
Liquid line
B
Discharge line
C
Last coil of condenser
D
Last coil of evaporator
Question 28 1 Marks
Which type of evaporator is used in frost free refrigerator?
A
Plate type
B
Wire mesh
C
Finned tube
D
Shell and tube
Question 29 1 Marks
Which component is used in frost free refrigerator?
A
Plate coil evaporator
B
Liquid receiver
C
Oil separator
D
Timer switch
Question 30 1 Marks
Which component switches ON/OFF the starting winding in RSIR motor?
A
Thermostat
B
Capacitor
C
Relay
D
OLP
Question 31 1 Marks
What is the function of starting capacitor in CSIR motor?
A
Gives initial torque
B
Gives running torque
C
Corrects power factor
D
Improves energy efficiency
Question 32 1 Marks
Which valve helps to attend mechanical faults without wasting the gas in split AC?
A
Gate valve
B
Float valve
C
Service valve
D
Expansion valve
Question 33 1 Marks
What is the effect on defective thermostat sensor in split AC?
A
Unit consumes less power
B
Increases super heat
C
AC unit runs continuously
D
Relay malfunctions
Question 34 1 Marks
Which type fan blade is used with out door unit of split AC?
A
Vane
B
Guide vane
C
Propeller
D
Centrifugal
Question 35 1 Marks
Which fan motor speed is used with outdoor unit in split AC?
A
Single speed
B
Double speed
C
Triple speed
D
Five speed
Question 36 1 Marks
Which control opens the compressor motor circuit in the event of continuous overload?
A
Thermostat
B
Fusible plug
C
Bimetal strip
D
Spring loaded relief valve
Question 37 1 Marks
Which component belongs to indoor unit of split AC?
A
Compressor
B
Condenser
C
Evaporator
D
Drier
Question 38 1 Marks
Which type of switch is used to control the room air temperature in split AC?
A
Over load protector
B
Thermostat switch
C
Manual switch
D
Thermal relay
Question 39 1 Marks
What is the function of remote control in split AC?
A
Humidity setting
B
Pressure setting
C
Drain water control
D
Transmits signal to operate AC
Question 40 1 Marks
What is the reason for air conditioner running continuously but no cooling effect ?
A
Condensation poor
B
Refrigerant is more
C
Refrigerant leaked
D
Over charged oil
Question 41 1 Marks
Which relay is used in capacitor start, capacitor run (CSR) compressor motor?
A
Voltage relay
B
Current relay
C
Thermal relay
D
Amperage relay
Question 42 1 Marks
Which winding has high inductance value in CSR compressor motor?
A
Common winding
B
Running winding
C
Starting winding
D
Auxiliary winding
Question 43 1 Marks
What is the remedy for the defective OLP in a window air conditioner?
A
Repair the OLP
B
Replace the OLP
C
Remove the parts
D
Repair the heater element
Question 44 1 Marks
What is the value of starting capacitor used for 1.5TR capacity window air conditioner?
A
40 to 60 MFD
B
80 to 100 MFD
C
130 to 150 MFD
D
150 to 160 MFD
Question 45 1 Marks
What is the reason for Compressor does not start ?
A
Defective fresh air damper
B
Defective oscillation motor
C
Defective fan motor
D
Defective OLP
Question 46 1 Marks
1 Which control device is used to maintain the room air temperature?
A
OLP
B
Relay
C
Thermostat
D
Selector switch
Question 47 1 Marks
Which type of compressor is used in window air conditioner?
A
Belt drive
B
Open type
C
Sealed type
D
Swash plate
Question 48 1 Marks
What is the value of running capacitor used for 1.5 TR window air conditioner?
A
36 MFD
B
40 MFD
C
80 MFD
D
100 MFD
Question 49 1 Marks
What is the cooling capacity of 0.5 TR in BTU / hr?
A
6000
B
12000
C
18000
D
24000
Question 50 1 Marks
What is the capacity of compressor motor used in 1Ton window air conditioner?
A
0.50 HP
B
0.75 HP
C
0.95 HP
D
1.00 HP