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Convection MCQ Questions And Answers - Heat Transfer

Convection MCQs : This section focuses on the "Convection" in Heat Transfer. These Multiple Choice Questions (MCQs) should be practiced to improve the Heat Transfer skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

Which of the following is true about Convection?

A. Convection is the process of heat transfer in fluids by the actual motion of matter
B. It happens in liquids and gases
C. It may be natural or forced
D. All of the above

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Question 2

How many types of convection there?

A. 1
B. 2
C. 3
D. 4

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Question 3

Forced convection is related to Newton’s law of cooling

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

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Question 4

oceanic winds is an example of?

A. Forced convection
B. Natural convection
C. Both A and B
D. None of the above

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Question 5

Which of the following heat flow situations pertains to free or natural convection?

A. Air conditioning installations and nuclear reactors
B. Flow of water inside the condenser tubes
C. Cooling of internal combustion engine
D. Cooling of billets in atmosphere

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Question 6

Mark the system where heat transfer is given by forced convection

A. Chilling effect of cold wind on warm body
B. Fluid passing through the tubes of a condenser and other heat exchange equipment
C. Heat flow from a hot pavement to surrounding atmosphere
D. Heat exchange on the outside of cold and warm pipes

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Question 7

Which of the following is an Convection Examples?

A. Sea breeze
B. Land Breeze
C. Both A and B
D. None of the above

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Question 8

Forced convection in a liquid bath is caused by

A. Intense stirring by an external agency
B. Molecular energy interactions
C. Density difference brought about by temperature gradients
D. Flow of electrons in a random fashion

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Question 9

Examples of forced convection are using water heaters or geysers for instant heating of water.

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

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Question 10

The convective heat transfer coefficient in laminar flow over a flat plate

A. Increases with distance
B. Increases if a higher viscosity fluid is used
C. Increases if a denser fluid is used
D. Decreases with increase in free stream velocity

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