Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

Why Mechanical Engineering Heat Transfer, Refrigeration and Air Conditioning?

In this section you can learn and practice Mechanical Engineering Questions based on "Heat Transfer, Refrigeration and Air Conditioning" and improve your skills in order to face the interview, competitive examination and various entrance test (CAT, GATE, GRE, MAT, Bank Exam, Railway Exam etc.) with full confidence.

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Here you can find objective type Mechanical Engineering Heat Transfer, Refrigeration and Air Conditioning questions and answers for interview and entrance examination. Multiple choice and true or false type questions are also provided.

How to solve Mechanical Engineering Heat Transfer, Refrigeration and Air Conditioning problems?

You can easily solve all kind of Mechanical Engineering questions based on Heat Transfer, Refrigeration and Air Conditioning by practicing the objective type exercises given below, also get shortcut methods to solve Mechanical Engineering Heat Transfer, Refrigeration and Air Conditioning problems.

1. 

The wet bulb temperature during sensible heating of air

A. remains constant
B. increases
C. decreases

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

2. 

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)

A.
B.
C.
D.

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

3. 

Which of the following statement is wrong?

A. The heat transfer in liquid and gases takes place according to convection.
B. The amount of heat flow through a body is dependent upon the material of the body.
C. The thermal conductivity of solid metals increases with rise in temperature,
D. Logarithmic mean temperature difference is not equal to the arithmetic mean temperature difference.

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

4. 

In free convection heat transfer transition from laminar to turbulent flow is governed by the critical value of the

A. Reynold's number
B. Grashoff's number
C. Reynold's number, Grashoff's number
D. Prandtl number, Grashoff's number

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

5. 

In a refrigerating machine, heat rejected is __________ heat absorbed.

A. equal to
B. less than
C. greater than

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

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