Heat Transfer MCQ Questions & Answers

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Each section contains 100 MCQs on Heat Transfer .

With the increase of temperature, the Col-burn jH factor

A) Increases B) Decreases C) Remains unchanged D) May increase or decrease ; depending on temperature

Discuss

Answer & Solution

Answer: Option A

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

For a liquid in laminar flow through a very long tube, when the exit fluid temperature approaches the wall temperature, the equation to be used is

A) Nu = 0.023 Re^0.8.Pr^0.4 B) Nu = $$\frac{\pi }{2}$$ Gz C) Nu = $$\frac{2}{\pi }$$ Gz D) Nu = 2 Gz^0.5

Discuss

Answer & Solution

Answer: Option C

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

In case of a vertical tube evaporator, with increase in the liquor level, the

A) Capacity of the evaporator is decreased B) Capacity of the evaporator is increased C) True temperature drop increases D) Both B and C

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Answer & Solution

Answer: Option A

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

For a perfectly transparent surface (like gases), the

A) Absorptivity = 0 B) Transmissivity = 1 C) Reflectivity = 0 D) All of the above

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Answer & Solution

Answer: Option B

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The units of resistance to heat transfer is

A) J.m^-2.K^-1 B) J.m^-1.K^-1 C) W.m^-2.K^-1 D) W^-1.m².K

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Answer & Solution

Answer: Option D

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

A sphere of radius 'R₁' is enclosed in a sphere of radius 'R₂'. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is

A) 0 B) $$\frac{{{{\text{R}}_2}}}{{{{\text{R}}_1} + {{\text{R}}_2}}}$$ C) 1 D) $${\left( {\frac{{{{\text{R}}_1}}}{{{{\text{R}}_2}}}} \right)^2}$$

Discuss

Answer & Solution

Answer: Option B

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

For hot feed, forward feeding as compared to backward feeding results in __________ economy.

A) Increased B) Decreased C) No effect on D) None of these

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Answer & Solution

Answer: Option A

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

Reynold's analogy states that

A) N_st α f B) N_st α N_Re C) N_Nu α f D) N_Re α f

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Answer & Solution

Answer: Option A

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

A perfect black body is a perfect __________ of radiation.

A) Absorber B) Emitter C) Both A & B D) Neither A nor B

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Answer & Solution

Answer: Option C

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

Tubes are held between top and bottom tube sheets in Calenderia type evaporator by keeping

A) Both the tube sheets fixed B) Both the tube sheets floating C) The top tube sheet floating and bottom tube sheet fixed D) The top tube sheet fixed and the bottom tube-sheet floating

Discuss

Answer & Solution

Answer: Option A

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

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Heat Transfer MCQ Questions & Answers | Chemical Engineering