Process Technology Equipment
Chapter 11 Heat Exchangers
A. Spiral
B. Double-pipe
C. Plate-and-frame
D. Shell-and-tube
2. Which of the following is the simplest form of heat exchanger?
A. Air-cooled
B. Plate-and-frame
C. Double-pipe
D. Shell-and-tube
3. Why is heat often recycled in the process industries?
A. To improve efficiency
B. To reduce wasting of heat energy
C. To reduce energy costs
D. All of the above
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Chapter 11 Heat Exchangers
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4. Which of the following is a symptom of fouling?
A. Increased diameter of the tubes
B. Loss of flow
C. Undesirable change in temperature
D. Insufficient heat output
5. What PPE should be worn during normal and abnormal heat exchanger
operations?
A. Goggles
B. Breathing protection
C. Face shields
D. All of the above
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Chapter 11 Heat Exchangers
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Process Technology Equipment
Chapter 11 Heat Exchangers
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APPENDIX, Chapter 11
Table of Contents
Contents
Page
Checking Your Knowledge Answer
Key
37
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Chapter 11 Heat Exchangers
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Checking Your Knowledge Answer Key
1. Define the following terms:
a. Backwashing
b. Baffle
c. BTU
d. Fouling
e. Counterflow
f. Crossflow
g. Laminar flow
h. Parallel flow
i. Turbulent flow
j. Convection
k. Conduction
Answers:
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Chapter 11 Heat Exchangers
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2. Heat exchangers are used to transfer heat between:
a. separation equipment
b. hot and cold streams
c. chemical reactions
d. temperature and pressure
3. (True/False) One BTU is equivalent to 252 calories.
4. Which of the following terms describes when the tube-side stream and the
shell-side stream flow in opposite directions?
a. Cross flow
b. Parallel flow
c. Turbulent flow
d. Countercurrent flow
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5. Select the components that are found in a heat exchanger. (Select all that
apply.)
a. Channel cover
b. Baffles/divider
c. Expansion joint
d. Tube sheet
6. A ______________ is a part of a heat exchanger that is bolted to the outside
end of the channel to retain exchanger fluid and provide access for cleaning.
a. tube sheet
b. channel cover
c. tie rod
d. baffle
Process Technology Equipment
Chapter 11 Heat Exchangers
7. Which of the following pieces of equipment is used to convert a vapor to a
liquid?
a. Preheater
b. Reboiler
c. Chiller
d. Condenser
8. Which of the following is NOT a common potential problem in heat
exchangers?
a. Chemical balance
b. Excessive chest pressure
c. Fouling, erosion, and corrosion
d. Vapor-locked conditions
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9. Match the items on the left with the correct description on the right.
1. Thermosiphon
a. Produces vapor from the liquid that enters it and
provides the distillation column with the vapor
necessary for separation inside the column.
2. Cooler
b. Uses cooling to convert a substance from a vapor to
a liquid
3. Reboiler
c. Is used to cool hot liquids
4. Condenser
d. Provides circulation based on density differences
Answers:
10. When should breathing protection be used with heat exchangers?
a. During normal operations
b. During abnormal events
c. When toxic gases may be present
d. At all times
11. (True/False) Thermal shock and overheating of fouled tubes can result in
ruptured and/or melted tubes.
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12. List three things a process technician should look for during the operation
and maintenance of heat exchangers.
13. ____________________ is a surface cleaning technique to remove scale or
other deposits from accessible surfaces.
a. Acidizing
b. Water blasting
c. Backwashing
d. High-point bleeding
14. (True/False) Backwashing requires specialized training to perform.
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