ExamVeda
Login
Home

Refrigeration And Air Conditioning MCQ Questions & Answers | Mechanical Engineering

Learn Refrigeration And Air Conditioning MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Refrigeration And Air Conditioning MCQ question is the important chapter for a Mechanical Engineering and GATE students. Page-9 section-2

Each section contains 100 MCQs on Refrigeration and Air Conditioning .
81
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
Discuss
Answer & Solution
Answer: Option D
Solution:
C.O.P. (heat pump) = 1 + C.O.P. (R effect)     [R = Refrigeration]
5 = 1 + C.O.P. (R effect)
C.O.P. (R effect) = 5 - 1.
C.O.P. (R effect) = 4.
82
In larger industrial and commercial reciprocating compression systems, refrigerant widely used is
Discuss
Answer & Solution
Answer: Option A
Solution:
In larger industrial and commercial reciprocating compression systems, refrigerant widely used is Ammonia
83
Degree of saturation or percentage humidity is
Discuss
Answer & Solution
Answer: Option C
Solution:
Degree of saturation or percentage humidity is, the ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure.
84
The superheated vapour region, in a pressure enthalpy chart, is represented by the space
Discuss
Answer & Solution
Answer: Option C
Solution:

The superheated vapour region, in a pressure enthalpy chart, is represented by the space Between the saturated liquid line and saturated vapour line
85
A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called
Discuss
Answer & Solution
Answer: Option C
Solution:

A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called Saturated air
86
One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice
Discuss
Answer & Solution
Answer: Option C
Solution:
One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice In 24 hours
87
Which of the following is not a desirable property of a refrigerant?
Discuss
Answer & Solution
Answer: Option C
Solution:
Good electrical conductor is not a desirable property of a refrigerant
88
The relative coefficient of performance is
Discuss
Answer & Solution
Answer: Option A
Solution:
The relative coefficient of performance is $$\frac{{{\text{Actual C}}{\text{.O}}{\text{.P}}{\text{.}}}}{{{\text{Theoretical C}}{\text{.O}}{\text{.P}}{\text{.}}}}$$
89
The wet bulb temperature at 100% relative humidity is ________ dew point temperature.
Discuss
Answer & Solution
Answer: Option A
Solution:
The wet bulb temperature at 100% relative humidity is same as dew point temperature.
90
Bell Coleman cycle is a
Discuss
Answer & Solution
Answer: Option C
Solution:
Bell Coleman cycle is a Reversed Joule cycle