The coefficient of performance of a domestic refrigerator is ________ as compared to a domestic air-conditioner.

The Carnot co-efficient of performance (COP) of a domestic air conditioner compared to a household refrigerator is

A

Less

B

More

C

Same

D

Dependent on climatic conditions

One fourth the price of a TV is equal to 1/6th the price of a refrigerator. If the total cost of the TV and the refrigerator is Tk 60000, what is the price of the TV?

A

Tk 22000

B

Tk 24000

C

Tk 27500

D

None of these

The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by

A

(C.O.P.)_P = (C.O.P.)_R + 2

B

(C.O.P.)_P = (C.O.P.)_R + 1

C

(C.O.P.)_P = (C.O.P.)_R - 1

D

(C.O.P.)_P = (C.O.P.)_R

The coefficient of performance of Electrolux refrigerator is the ratio of

A

Heat supplied by the gas burner to the heat absorbed by the evaporator

B

Heat absorbed by the evaporator to the heat supplied by the gas burner

C

Heat supplied by the gas burner minus the heat absorbed by the evaporator to the heat supplied by the gas burner

D

Heat absorbed by the evaporator minus the heat supplied by the gas burner to the heat absorbed by the evaporator

In a domestic vapour compression refrigerator, the refrigerant commonly used is

A

CO₂

B

Ammonia

C

R-12

D

All of these

The bank of tubes at the back of domestic refrigerator is

A

Condenser tubes

B

Evaporator tubes

C

Refrigerant cooling tubes

D

Capillary tubes

Domestic refrigerator usually works on the __________ refrigeration cycle.

A

Carnot

B

Air

C

Absorption

D

Vapour-ejection

The common refrigerant in domestic refrigerator is

A

Neon

B

Oxygen

C

Nitrogen

D

Freon

In a domestic refrigerator, a capillary tube controls the flow of refrigerant from the

A

Expansion valve to the evaporator

B

Evaporator to the thermostat

C

Condenser to the expansion valve

D

Condenser to the evaporator

The capacity of a domestic refrigerator is in the range of

A

0.1 to 0.3 TR

B

1 to 3 TR

C

3 to 5 TR

D

5 to 7 TR

The coefficient of performance of a domestic refrigerator is ________ as compared to a domestic air-conditioner.

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