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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-1

Each section contains 100 MCQs on Refrigeration and Air Conditioning .
81
The index which correlates the combined effects of air temperature, relative humidity and air velocity on the human body, is known as
Discuss
Answer & Solution
Answer: Option B
Solution:
The index which correlates the combined effects of air temperature, relative humidity and air velocity on the human body, is known as Effective temperature
82
The mass of water vapour present in __________ is called absolute humidity.
Discuss
Answer & Solution
Answer: Option B
Solution:
Absolute humidity is the measure of water vapor (moisture) in the air, regardless of temperature. It is expressed as grams of moisture per cubic meter of air (g/m3).
83
An Electrolux refrigerator is called a _________ absorption system.
Discuss
Answer & Solution
Answer: Option C
Solution:

An Electrolux refrigerator is called a Three fluids absorption system.
84
For unsaturated air, the dew point temperature is __________ wet bulb temperature.
Discuss
Answer & Solution
Answer: Option B
Solution:
For unsaturated air, the dew point temperature is less than wet bulb temperature.
85
As relative humidity decreases, the dew point temperature will be ________ wet bulb temperature.
Discuss
Answer & Solution
Answer: Option B
Solution:

As relative humidity decreases, the dew point temperature will be lower than wet bulb temperature.
86
The wet bulb temperature at 100% relative humidity is ________ dry bulb temperature.
Discuss
Answer & Solution
Answer: Option A
Solution:
The wet bulb temperature at 100% relative humidity is same as dry bulb temperature.
87
In a reversed Brayton cycle, the heat is absorbed by the air during
Discuss
Answer & Solution
Answer: Option D
Solution:
In a reversed Brayton cycle, the heat is absorbed by the air during Constant pressure expansion process
88
The curved lines on a psychrometric chart indicates
Discuss
Answer & Solution
Answer: Option D
Solution:
The curved lines on a psychrometric chart indicates Relative humidity
89
The horizontal and non-uniformly spaced lines on a psychrometric chart indicates
Discuss
Answer & Solution
Answer: Option C
Solution:
The horizontal and non-uniformly spaced lines on a psychrometric chart indicates Dew point temperature
90
The vertical and uniformly spaced lines on a psychrometric chart indicates
Discuss
Answer & Solution
Answer: Option A
Solution:

The vertical and uniformly spaced lines on a psychrometric chart indicates Dry bulb temperature