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 5 of 40

Q41.
The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl number is
Discuss
Answer: (a).equal to one
Discuss
Answer: (b).absorbs heat radiations of all wave lengths falling on it
Discuss
Answer: (c).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.
Q44.
The coefficient of performance of Heat Pump is always __________ one.
Discuss
Answer: (c).greater than
Q45.
The wet bulb temperature during sensible heating of air
Discuss
Answer: (b).increases
Q46.
The C.O.P. of an absorption type refrigerator is given by (where T1 = Temperature at which the working substance receives heat, T2 = Temperature of cooling water, and T3 = Evaporator temperature)
Discuss
Answer: (b).[T₃ (T₁ - T₂)]/ [T₁ (T₂ - T₃)]
Discuss
Answer: (c).The thermal conductivity of solid metals increases with rise in temperature,
Q48.
In free convection heat transfer transition from laminar to turbulent flow is governed by the critical value of the
Discuss
Answer: (d).Prandtl number, Grashoff's number
Q49.
In a refrigerating machine, heat rejected is __________ heat absorbed.
Discuss
Answer: (c).greater than
Discuss
Answer: (d).all of these
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