Explore topic-wise MCQs in Heat Transfer Operations Questions and Answers.

This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer Operations Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.

Which one of the following is correct expression for sphericity of a particle?

A. Note: Vp = Volume of particle, Ap = Surface areas of the Particle.
B. S = \(\frac{6Vp}{Ap}\)
C. S = \(\frac{\pi^{\frac{1}{3}}(6Vp)^\frac{2}{3}}{Ap}\)
D. S = \(\frac{\pi^{\frac{1}{3}}(6Vp)^\frac{4}{3}}{Ap}\)
E. S = \(\frac{(6Vp)^\frac{2}{3}}{Ap}\)
Answer» C. S = \(\frac{\pi^{\frac{1}{3}}(6Vp)^\frac{2}{3}}{Ap}\)
Discussion
2.

What is the term Ɵ in the Kozeny Carman equation for laminar flow in packed beds?

A. \(\frac{∆P}{L} = \frac{-180μ}{S^2 D_P^2} (\frac{(1-∈)^2}{∈^3}) ϑ_S \)
B. Surface Area of pellets
C. Sphericity of Pellets
D. Void fraction
E. Density
Answer» C. Sphericity of Pellets
Discussion
3.

In the Formula for porosity, what is the meaning of the term V?

A. ∅ = \(\frac{V}{V_T}\)
B. Volume of Void
C. Volume of Pure Solid
D. Total Volume
E. Volume of the tube material
Answer» B. Volume of Void
Discussion
4.

If we have a tube of diameter 30mm and particles of diameter 3mm, the length of the tube is 10cm and the number of pellets is 100. The flow rate is 5cm3/s, then what is the superficial velocity?

A. 0.5cm/s
B. 0.45cm/s
C. 0.7cm/s
D. 0.8cm/s
Answer» D. 0.8cm/s
Discussion
5.

If we have very small dp/di < 0.01, then we may use ____________

A. Ergun Equation
B. Kozeny Carman Equation
C. Sieder Tate Equation
D. Arrhenius Equation
Answer» C. Sieder Tate Equation
Discussion
6.

In the Ergun equation, what do you understand by the term X?

A. f = ΔP/L X/ρ&vartheta;S2(∈3/(1-∈))
B. Diameter of the tube
C. Diameter of the pellets
D. Effective diameter
E. Equivalent diameter of the tube
Answer» C. Diameter of the pellets
Discussion