Heat Transfer,Refrigeration and Air Conditioning MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Heat Transfer,Refrigeration and Air Conditioning, a fundamental topic in the field of Mechanical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Heat Transfer,Refrigeration and Air Conditioning MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Heat Transfer,Refrigeration and Air Conditioning mcq questions that explore various aspects of Heat Transfer,Refrigeration and Air Conditioning problems. Each MCQ is crafted to challenge your understanding of Heat Transfer,Refrigeration and Air Conditioning principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Mechanical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Heat Transfer,Refrigeration and Air Conditioning MCQs are your pathway to success in mastering this essential Mechanical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Heat Transfer,Refrigeration and Air Conditioning. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Heat Transfer,Refrigeration and Air Conditioning knowledge to the test? Let's get started with our carefully curated MCQs!

Heat Transfer,Refrigeration and Air Conditioning MCQs | Page 2 of 40

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Q11.
The humidity ratio or specific humidity is the mass of water vapour present in
Discuss
Answer: (d).1 kg of dry air
Discuss
Answer: (c).increases power consumption
Discuss
Answer: (a).increases with increase in velocity of air passing through it
Q14.
The difference between dry bulb temperature and wet bulb temperature, is called
Discuss
Answer: (b).wet bulb depression
Q15.
Defrosting of a refrigerator may be done by stopping the compressor for a short period.
Discuss
Answer: (a).Correct
Q16.
In aqua-ammonia and Lithium-bromide water absorption refrigeration systems, the refrigerants are respectively
Discuss
Answer: (d).ammonia and water
Q17.
As relative humidity decreases, the dew point temperature will be __________ wet bulb temperature.
Discuss
Answer: (b).lower than
Q18.
The process of heat transfer from a hot body to a cold body, in a straight line, without affecting the intervening medium, is called radiation.
Discuss
Answer: (a).True
Q19.
Reynolds number (RN) is given by (where h = Film coefficient, l = Linear dimension, V = Velocity of fluid, k = Thermal conductivity, t = Temperature, ฯ = Density of fluid, cp = Specific heat at constant pressure, and ฮผ = Coefficient of absolute viscosity)
Discuss
Answer: (c).RN = ฯ V l /ฮผ
Discuss
Answer: (b).lower in winter than in summer