Explore topic-wise MCQs in Heat Transfer Operations.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer Operations knowledge and support exam preparation. Choose a topic below to get started.

1.

If the condensation occurs at the outside surface of the tubes, then the equation for the heat transfer coefficient cab be represented as which one of the following?

A. h<sub>VER</sub>=0.943 ([ frac{K^3 p^2 g h_{fg}}{ x(T_{sat} T_L)}]^{0.25} )
B. h<sub>VER</sub>=1.13 ([ frac{K^3 p^2 g h_{fg}}{ x(T_{sat} T_L)} ]^{0.25} )
C. h<sub>VER</sub>=0.723 ([ frac{K^3 p^2 g h_{fg}}{ x(T_{sat} T_L)} ]^{0.25} )
D. h<sub>VER</sub>=0.725 ([ frac{K^3 p^2 g h_{fg}}{ x(T_{sat} T_L) }]^{0.25} )
Answer» C. h<sub>VER</sub>=0.723 ([ frac{K^3 p^2 g h_{fg}}{ x(T_{sat} T_L)} ]^{0.25} )
Discussion
2.

If the condensation occurs at the outside surface of the tubes, then the equation for the heat transfer coefficient does not change.

A. True
B. False
Answer» C.
Discussion
3.

An increase in number of tubes will lead to larger condensate thickness in the lower tubes leading to ____________ heat transfer coefficient

A. Larger
B. Smaller
C. Zero
D. Infinite
Answer» C. Zero
Discussion
4.

A large value of temperature difference will lead to more condensation and hence a __________ heat transfer coefficient

A. Larger
B. Smaller
C. Zero
D. Infinite
Answer» C. Zero
Discussion
5.

A high value of latent heat hfg means that the heat transfer coefficient would __________

A. Increase
B. Decrease
C. Remains same
D. Becomes zero
Answer» B. Decrease
Discussion
6.

As thermal conductivity kF increases, the heat transfer coefficient ________

A. Increases
B. Decreases
C. Remains same
D. Jumps to a high value
Answer» B. Decreases
Discussion
7.

What is the expression for heat transfer coefficient for a horizontally placed condenser?

A. h<sub>HOR</sub>=0.943 ([ frac{K^3 p^2 g h_{fg}}{ x(T_{sat} T_L)}]^{0.25} )
B. h<sub>HOR</sub>=0.743 ([ frac{K^3 p^2 g h_{fg}}{ x(T_{sat} T_L)}]^{0.25} )
C. h<sub>HOR</sub>=0.723 ([ frac{K^3 p^2 g h_{fg}}{ x(T_{sat} T_L)}]^{0.25} )
D. h<sub>HOR</sub>=0.725 ([ frac{K^3 p^2 g h_{fg}}{ x(T_{sat} T_L)}]^{0.25} )
Answer» E.
Discussion
8.

What is the expression for heat transfer coefficient for a vertically placed condenser?

A. h<sub>VER</sub>=0.943 ([ frac{K^3 p^2 g h_{fg}}{ x(T_{sat} T_L)}]^{0.25} )
B. h<sub>VER</sub>=0.743 ([ frac{K^3 p^2 g h_{fg}}{ x(T_{sat} T_L)}]^{0.25} )
C. h<sub>VER</sub>=0.723 ([ frac{K^3 p^2 g h_{fg}}{ x(T_{sat} T_L)} ]^{0.25} )
D. h<sub>VER</sub>=0.725 ([ frac{K^3 p^2 g h_{fg}}{ x(T_{sat} T_L) }]^{0.25} )
Answer» B. h<sub>VER</sub>=0.743 ([ frac{K^3 p^2 g h_{fg}}{ x(T_{sat} T_L)}]^{0.25} )
Discussion