Quiz Questions

Question 1 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 2 1 Marks

Which type of condenser is used in window air conditioner?

A

Fins and tube

B

Plate and tube

C

Plate and coil

D

Bare tube

Question 3 1 Marks

Which type of expansion valve is used in window air conditioner?

A

Capillary tube

B

Low side float valve

C

Automatic expansion valve

D

Thermostatic expansion valve

Question 4 1 Marks

Which type of evaporator is used in window air conditioner?

A

Bare tube

B

Plate and tube

C

Fins and plate

D

Fins and tube

Question 5 1 Marks

Which material is used for making fins of condenser in a window air conditioner?

A

Brass

B

Copper

C

Cast iron

D

Aluminium

Question 6 1 Marks

What is the cooling capacity of 0.5 TR in BTU / hr?

A

6000

B

12000

C

18000

D

24000

Question 7 1 Marks

1 Which control device is used to maintain the room air temperature?

A

OLP

B

Relay

C

Thermostat

D

Selector switch

Question 8 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 9 1 Marks

Which safety device is used for compressor motor in window air conditioner?

A

Relay

B

Starting capacitor

C

Running capacitor

D

Over load protector

Question 10 1 Marks

Which part of window AC removes dust particles from the room air?

A

Strainer

B

Air filter

C

Filter drier

D

Dehydrator

Question 11 1 Marks

Which capacity of fan motor is used in 1Ton window air conditioner?

A

1/5 HP

B

1/10 HP

C

1/16 HP

D

1/20 HP

Question 12 1 Marks

Which capacitor is connected in series with starting winding of CSR motor during operation?

A

Fan capacitor|

B

Run capacitor

C

Start capacitor

D

No capacitor is connected

Question 13 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 14 1 Marks

What is the value of starting capacitor used for 1TR window air conditioner?

A

40 MFD

B

60 MFD

C

80 MFD

D

100 MFD

Question 15 1 Marks

What is the purpose of relay used in window air conditioner?

A

Disconnect the starting capacitor

B

Disconnect the running capacitor

C

Disconnect the fan capacitor

D

Disconnect the winding

Question 16 1 Marks

Which is increased by the fins of condenser tubes in window air conditioner?

A

Heat transfer rate

B

Power consumption

C

Discharge pressure

D

Refrigerant flow rate

Question 17 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 18 1 Marks

What is the cooling capacity of 1 TR in K Cal / hr?

A

3000

B

4000

C

5000

D

6000

Question 19 1 Marks

Where the relay coil is internally connected in voltage relay?

A

Across 1 and 2

B

Across 5 and 1

C

Across 5 and 2

D

Across 2 and 4

Question 20 1 Marks

Which winding of compressor motor is directly connected across voltage relay coil?

A

Main winding

B

Starting winding

C

Running winding

D

Auxiliary winding

Question 21 1 Marks

What is the reason for excessive frost on evaporator coil in window AC?

A

Evaporator fins not blocked by dust

B

Blower rotating at higher speed

C

Air filter blocked completely

D

More air circulation in evaporator

Question 22 1 Marks

What is the reason for Very high condenser temperature in a window air conditioner?

A

Water splashes condenser

B

More air flows into the condenser

C

Fan motor working in good condition

D

Dust accumulated in the condenser fins

Question 23 1 Marks

How to neutralise the concentration of leaked ammonia from air

A

Recover ammonia from air

B

Spraying a lot of water

C

Shut down the plant

D

Spray Hydrochloric acid

Question 24 1 Marks

What is the reason for the compressor does not start but the fan motor works normally in window AC?

A

Defective blower

B

Defective fan motor

C

Defective fan capacitor

D

Defective compressor motor

Question 25 1 Marks

Which device is used to exhaust the room air in window AC?

A

Damper

B

Air filter

C

Filter drier

D

Air washer

Question 26 1 Marks

What is the area of room cooled by 1ton window air conditioner?

A

5000 sq.ft

B

2000 sq.ft

C

1000 sq.ft

D

3000 sq.ft

Question 27 1 Marks

Where the filter drier is installed in window AC refrigerant circuit?

A

Discharge line

B

Suction line

C

Service line

D

Liquid line

Question 28 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 29 1 Marks

What is the reason for the compressor motor burn out in a window air conditioner?

A

Defective fan capacitor

B

Defective fan motor

C

Defective blower

D

Defective OLP

Question 30 1 Marks

What is the purpose of operating the fan motor first and then the compressor motor in Air conditioners?

A

Cool the coils first by fan

B

Cool the compressor by fan

C

Minimise the noise of motors

D

Stop the high starting current by both motors

Question 31 1 Marks

What is the effect of sensing higher
temperature by thermistor NTC?

A

Resistance increases

B

Resistance decreases

C

Resistance becomes zero

D

Resistance becomes infinity

Question 32 1 Marks

Where the normally closed contacts are internally connected in voltage relay?

A

Across 1 and 5

B

Across 2 and 5

C

Across 1 and 2

D

Across 2 and 4

Question 33 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 34 1 Marks

What is the remedy to remove moisture from the window AC system?

A

Over gas charge in the system

B

Evacuate the system deeply

C

Clean the evaporator fins

D

Clean the condenser fins

Question 35 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

Question 36 1 Marks

Which type of fan motor is used in window air conditioner?

A

Three phase single shaft motor

B

Single phase single shaft motor

C

Three phase double end shaft motor

D

Single phase double end shaft motor

Question 37 1 Marks

What is the cause of reduced supply air throw though air filter is clean in window AC?

A

No frost in the evaporator

B

Frost accumulated in the evaporator

C

Dust accumulated in the condenser

D

No dust accumulated in the evaporator

Question 38 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 39 1 Marks

Which stabilizer capacity is used for 1 Ton window air conditioner?

A

2 KVA

B

3 KVA

C

4 KVA

D

5 KVA

Question 40 1 Marks

Which is indicated by the arrow mark on filter drier component?

A

Flow direction of air

B

Position of capillary tube

C

Flow direction of refrigerant

D

Arrangement of desiccant and filter

Which type of compressor is used in window air conditioner?

Which type of condenser is used in window air conditioner?

Which type of expansion valve is used in window air conditioner?

Which type of evaporator is used in window air conditioner?

Which material is used for making fins of condenser in a window air conditioner?

What is the cooling capacity of 0.5 TR in BTU / hr?

1 Which control device is used to maintain the room air temperature?

Which relay is used in capacitor start, capacitor run (CSR) compressor motor?

Which safety device is used for compressor motor in window air conditioner?

Which part of window AC removes dust particles from the room air?

Which capacity of fan motor is used in 1Ton window air conditioner?

Which capacitor is connected in series with starting winding of CSR motor during operation?

What is the value of running capacitor used for 1.5 TR window air conditioner?

What is the value of starting capacitor used for 1TR window air conditioner?

What is the purpose of relay used in window air conditioner?

Which is increased by the fins of condenser tubes in window air conditioner?

What is the remedy for the defective OLP in a window air conditioner?

What is the cooling capacity of 1 TR in K Cal / hr?

Where the relay coil is internally connected in voltage relay?

Which winding of compressor motor is directly connected across voltage relay coil?

What is the reason for excessive frost on evaporator coil in window AC?

What is the reason for Very high condenser temperature in a window air conditioner?

How to neutralise the concentration of leaked ammonia from air

What is the reason for the compressor does not start but the fan motor works normally in window AC?

Which device is used to exhaust the room air in window AC?

What is the area of room cooled by 1ton window air conditioner?

Where the filter drier is installed in window AC refrigerant circuit?

Which winding has high inductance value in CSR compressor motor?

What is the reason for the compressor motor burn out in a window air conditioner?

What is the purpose of operating the fan motor first and then the compressor motor in Air conditioners?

What is the effect of sensing higher temperature by thermistor NTC?

Where the normally closed contacts are internally connected in voltage relay?

What is the reason for Compressor does not start ?

What is the remedy to remove moisture from the window AC system?

What is the capacity of compressor motor used in 1Ton window air conditioner?

Which type of fan motor is used in window air conditioner?

What is the cause of reduced supply air throw though air filter is clean in window AC?

What is the value of starting capacitor used for 1.5TR capacity window air conditioner?

Which stabilizer capacity is used for 1 Ton window air conditioner?

Which is indicated by the arrow mark on filter drier component?

What is the effect of sensing higher
temperature by thermistor NTC?