Heat Transfer MCQ Questions & Answers

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Each section contains 100 MCQs on Heat Transfer .

To reduce the tube side pressure drop for the same flow rate, the heat exchanger recomended is

A) 1-2 heat exchanger B) 1-1 heat exchanger C) 3-2 heat exchanger D) 2-4 heat exchanger

Discuss

Answer & Solution

Answer: Option B

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

In the free convection regime of pool boiling, the heat flux is proportional to

A) $$\Delta {{\text{t}}^{\frac{1}{2}}}$$ B) Δt² C) $$\Delta {{\text{t}}^{\frac{5}{4}}}$$ D) Δt

Discuss

Answer & Solution

Answer: Option C

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

The average heat transfer co-efficient over the entire length of the plate (h_a) and the local heat transfer co-efficient (h_L), in case of heat transfer over a flat plate in lminar zone is related as

A) H_a = 0.8h_L B) H_a = 2h_L C) H_a = h_L D) H_a= 5h_L

Discuss

Answer & Solution

Answer: Option B

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

For what value of Prandtl number, $${\text{St}} = \frac{{\text{f}}}{2}?$$

A) 1.5 B) 1 C) > 1 D) < 1

Discuss

Answer & Solution

Answer: Option B

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

Prandtl and Reynolds analogy are same, when Prandtl number is

A) 0.5 B) 1 C) > 2 D) 1.5

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Answer & Solution

Answer: Option B

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

Calburn analogy is applicable for the value of Prandtl number from

A) 0.001 to 1 B) 0.6 to 120 C) 0.5 to 5 D) 120 to 400

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Answer & Solution

Answer: Option B

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

Conduction occurs in the buffer zone for a fluid flowing through a heated pipe, only when Prandtl number is

A) 0.1 B) >1 C) < 1 D) L

Discuss

Answer & Solution

Answer: Option A

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

Conductance is given by (where, x = thickness, A = heat flow area, K = thermal conductivity.)

A) $$\frac{{\text{x}}}{{{\text{KA}}}}$$ B) $$\frac{{{\text{KA}}}}{{\text{x}}}$$ C) $$\frac{{\text{K}}}{{{\text{Ax}}}}$$ D) $$\frac{{\text{A}}}{{{\text{Kx}}}}$$

Discuss

Answer & Solution

Answer: Option B

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

Baffles are provided in heat exchangers to increase the

A) Fouling factor B) Heat transfer area C) Heat transfer co-efficient D) Heat transfer rate

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Answer & Solution

Answer: Option C

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

100

What is the geometric mean of two heat transfer areas A₁ and A₂?

A) $$\sqrt {{{\text{A}}_1} \cdot {{\text{A}}_2}} $$ B) $$\sqrt {{{\text{A}}_1} + {{\text{A}}_2}} $$ C) $$\frac{1}{2}\sqrt {{{\text{A}}_1} \cdot {{\text{A}}_2}} $$ D) $$2\sqrt {{{\text{A}}_1} \cdot {{\text{A}}_2}} $$

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