Heat Transfer MCQ Questions & Answers

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Each section contains 100 MCQs on Heat Transfer .

jH factor for heat transfer depends upon the __________ number.

A) Biot B) Nusselt C) Reynolds D) Prandtl

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Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

The dimensionless group in mass transfer that is equivalent to Prandtl number in heat transfer is

A) Nusselt number B) Sherwood number C) Schmidt number D) Stanton number

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Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

With increase in porosity, the thermal conductivity of a solid substance

A) Increases B) Decreases C) Remains unchanged D) May increase or decrease; depends on the solid

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Answer & Solution

Answer: Option B

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'Duhring's plot' is of use in

A) Extractive distillation B) Evaporation C) Leaching D) Absorption

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Answer & Solution

Answer: Option B

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Heat exchangers operating, when the asymptotic range is reached,

A) Provide very large heat transfer co-efficient B) Results in making part of the heating surface inactive C) Results in abruptly increased velocity D) None of these

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Answer & Solution

Answer: Option B

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In natural convection heat transfer, the correlating parameter is the

A) Graetz number B) Eckert number C) Grashoff number D) Bond number

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Answer & Solution

Answer: Option C

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Stefen's block body radiation law can also be derived from __________ law.

A) Kirchoffs B) Planck's C) Fourier's D) None of these

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Answer & Solution

Answer: Option B

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What is the emissivity of a black body?

A) 1 B) 0 C) 0.90 D) 0.5

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Answer & Solution

Answer: Option A

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Pick out the wrong statement.

A) Orifice baffles are never used in a shell and tube heat exchanger B) Pressure drop on the shell side of a heat exchanger depends upon tube pitch also C) In a horizontal tube evaporator, surface blanketing by air is avoided D) Split ring type and pull through type floating heads are two commonly used floating heads is heat exchangers

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Answer & Solution

Answer: Option A

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Unsteady state heat conduction occurs, when

A) Temperature distribution is independent of time B) Temperature distribution is dependent on time C) Heat flows in one direction only D) Three dimensional heat flow is concerned

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Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

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Heat Transfer MCQ Questions & Answers | Chemical Engineering