Ammonia leakage in the refrigeration system is detected by

The leakage in a refrigeration system using ammonia is detected by

A

Halide torch

B

Sulphur sticks

C

Soap and water

D

All of these

The leakage in a refrigeration system using Freon is detected by

A

Halide torch

B

Sulphur sticks

C

Soap and water

D

All of these

The most important consideration, while designing the refrigeration system of an aircraft is that the refrigeration system

A

Is as light as possible

B

Has very high C.O.P

C

Employs minimum quantity of refrigerant

D

Consumer minimum horse power

The leaks in a refrigeration system using Freon are detected by

A

Halide torch which on detection produces greenish flame lighting

B

Sulphur sticks which on detection gives white smoke

C

Using reagents

D

Smelling

In aqua ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water in

A

Condenser

B

Evaporator

C

Absorber

D

None of these

Hydrogen is used in Electrolux refrigeration system so as to _________ the rate of evaporation of the liquid ammonia passing through the evaporator.

A

Equalize

B

Reduce

C

Increase

D

None of these

Aqua ammonia is used as refrigerant in the following type of refrigeration system

A

Compression

B

Direct

C

Indirect

D

Absorption

One Ton of Refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice---

A

In 1 hour

B

In 24 hour

C

In 10 minutes

D

In 12 hour

A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the co-efficient of performance (COP) for a given refrigeration effect?

A

Vapor compression cycle using expansion valve

B

Air refrigeration cycle

C

Vapor compression cycle using expansion engine

D

Carnot refrigeration cycle

Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is

A

Positive

B

Negative

C

Zero

D

Infinity

Ammonia leakage in the refrigeration system is detected by

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