Vidyalelo
Mechanical Engineering · all questions

Refrigeration And Air Conditioning
practice.

Practice every MCQ with options. Use Show answers when you want the correct option and solution.

285

Questions

10/15

Page

Pick an option on a question to see the right answer and solution.

A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be

Select an option to see the answer and solution.

In larger industrial and commercial reciprocating compression systems, refrigerant widely used is

Select an option to see the answer and solution.

Degree of saturation or percentage humidity is

Select an option to see the answer and solution.

The superheated vapour region, in a pressure enthalpy chart, is represented by the space

Select an option to see the answer and solution.

A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called

Select an option to see the answer and solution.

One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice

Select an option to see the answer and solution.

Which of the following is not a desirable property of a refrigerant?

Select an option to see the answer and solution.

The relative coefficient of performance is

Select an option to see the answer and solution.

The wet bulb temperature at 100% relative humidity is ________ dew point temperature.

Select an option to see the answer and solution.

Bell Coleman cycle is a

Select an option to see the answer and solution.

In Electrolux refrigerator

Select an option to see the answer and solution.

The dry bulb temperature lines, on the psychrometric chart are

Select an option to see the answer and solution.

The relative humidity lines on a psychrometric chart are

Select an option to see the answer and solution.

Where does the lowest temperature occur in a vapour compression cycle?

Select an option to see the answer and solution.

The refrigerant supplied to a compressor must be

Select an option to see the answer and solution.

One ton refrigeration corresponds to

Select an option to see the answer and solution.

Ammonia absorption refrigeration cycle requires

Select an option to see the answer and solution.

The leakage in a refrigeration system using Freon is detected by

Select an option to see the answer and solution.

In order to collect liquid refrigerant and to prevent it from going to a ________, a device known as accumulator is used at the suction of compressor.

Select an option to see the answer and solution.

The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases,

Select an option to see the answer and solution.