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 11 of 40

Q101.
The process of adding moisture to the air, without change in its dry bulb temperature, is known as humidification.
Discuss
Answer: (a).Agree
Q102.
In case of liquids and gases, the heat transfer takes place according to
Discuss
Answer: (b).convection
Q103.
The logarithmic mean temperature difference (tm) is given by (where Δt1 and Δt2 are temperature differences between the hot and cold fluids at entrance and exit)
Discuss
Answer: (a).tm = (Δt1 - Δt2)/ loge (Δt1/Δt2)
Q104.
The radiation emitted by a black body is known as
Discuss
Answer: (d).all of these
Q105.
Which of the following refrigerant has the maximum ozone depletion potential in the stratophere?
Discuss
Answer: (d).Flourine
Discuss
Answer: (d).all of the above
Q107.
According to Stefan's law, the total radiation from a black body per second per unit area is directly proportional to the fourth power of the absolute temperature.
Discuss
Answer: (a).Correct
Discuss
Answer: (c).ammonia evaporates in hydrogen
Q109.
Two long parallel surfaces each of emissivity 0.7 are maintained at different temperatures and accordingly have radiation heat exchange between them. It is desired to reduce 75% of the radiant heat transfer by inserting thin parallel shields of emissivity 1 on both sides. The number of shields should be
Discuss
Answer: (c).three
Q110.
The C.O.P. of a Carnot refrigerator in winter will be __________ as compared to C.O.P. in summer.
Discuss
Answer: (c).higher