My Report

Heat Transfer Operations Practice Test 1


Correct Answer: 2 points | Wrong: -1 point
Grades: A* (100% score) | A (80%-99%) | B (60%-80%) | C (40%-60%) | D (0%-40%)
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1. What is the resistance of the following wall setup?
heat-transfer-operations-questions-answers-combined-heat-transfer-conduction-convection-q8

2. For the calculation of Overall Heat transfer coefficient for fouling factor R, which one of the following expression do we use?

3. Why do we use counter-flow operation on gasketed type Heat Exchanger?

4. The important design and operating considerations for Extended-Surface Compact Heat Exchangers are:
(1) Both fluids may have high or low heat transfer coefficients
(2) As the tubes are very narrow (low DH), the fluid used should not be corrosive as effective cleaning of tubes is not possible.
(3) The fluid pressure drop calculation is important as a regulatory method to ensure long life of the tubes.
(4) Unlike shell and tube type heat exchangers, these are limited when it comes to operating pressure and temperature.

5. Which one of the following statement is correct?

6. In an operation where we want to heat a stream of liquid by Steam, we have the option to use extended fins. Then which of the following is best suited?

7. Algal deposits on the tube surfaces of the heat exchanger belong to which class of fouling?

8. The Hydraulic Diameter (DH) is defined as _____
AO : is the minimum free-flow area on one fluid side of a heat exchanger.
P : is the wetted perimeter of flow passages of that side.

9. Fouling factors increase the overall heat transfer conductance and hence decrease the overall heat transfer coefficient.

10. Which of the following is not a subset of the category of Tubular Heat Exchangers?


 

Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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