The bank of tubes at the back of domestic refrigerator is

The bank of tubes located at the back of the domestic refrigerators are the __________ tubes.

A

Refrigerant cooling

B

Evaporator

C

Condenser

D

Throttling

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

A

Same

B

Less

C

More

D

None of these

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 diameters of fire tubes and superheater tubes in locomotive boiler are

A

47.5 mm, 130 mm

B

32.5 mm, 180 mm

C

65.5 mm, 210 mm

D

24.5 mm, 65 mm

Brass tubes are used in the manufacture of tubes of evaporators used in sugar and salt industries, mainly because of its

A

High co-efficient of thermal expansion

B

Low thermal conductivity

C

High corrosion resistance

D

All of the above

In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones ; because the smaller diameter tubes

A

Are easier to clean

B

Are less prone to fouling

C

Can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less

D

None of these

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

A

CO₂

B

Ammonia

C

R-12

D

All of these

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 bank of tubes at the back of domestic refrigerator is

Related Questions