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Process Technology Equipment
Chapter 11 Heat Exchangers
Page 21
Summary and Wrap-Up
Time: 4 minutes
Resources: Slide 32
Suggested Student Activities
(Note to Instructor: Time permitting, do the activities listed below or possibly assign
them as homework. Be sure to remind students what to read for the next class.)
End of Chapter Review Questions
Process Technology Equipment
Chapter 11 Heat Exchangers
Page 22
1. What is a primary mode of heat transfer utilized in heat exchangers?
A. Radiation
B. Convection
C. Economizer
D. Condensation
2. Which of the following is NOT a type of heat exchanger?
A. Single-pipe
B. Double-pipe
C. Shell-and-tube
D. Plate-and-frame
3. What unit is typically used to measure heat energy?
Process Technology Equipment
Chapter 11 Heat Exchangers
A. Joule
B. Calories
C. Celsius
D. Fahrenheit
4. What type of heat exchanger is limited to low heat duty?
A. Reboilers
B. Spiral-wound
C. Double-pipe
D. Plate-and-frame
5. What type of heat exchanger is used with clean, nontoxic materials, and
operates at fairly low pressures and temperatures?
A. Reboilers
B. Spiral-wound
C. Double-pipe
D. Plate-and-frame
Process Technology Equipment
Chapter 11 Heat Exchangers
Page 24
6. What type of shell-and-tube heat exchanger is better able to deal with thermal
expansion?
A. U-tube
B. Floating head
C. Fixed tubesheet
D. Reboiler
7. What is a heat exchanger that is used to supply the heat necessary to drive a
distillation column?
A. Reboiler
B. Preheater
C. Interchanger
D. Condenser
Process Technology Equipment
Chapter 11 Heat Exchangers
Page 25
8. Which of the following is a process-to-process heat exchanger?
A. Reboiler
B. Preheater
C. Interchanger
D. Condenser
9. What is a group of fixed or parallel tubes through which process fluids are
circulated?
A. Shell
B. Tubesheet
C. Tube bundle
D. Exchanger head
Process Technology Equipment
Chapter 11 Heat Exchangers
Page 26
10. What is located on the end of a heat exchanger and is where the flow of fluids
is directed into and out of the tubes?
A. Shell
B. Tubesheet
C. Tube bundle
D. Exchanger head
11. What is a flat or notched dam that functions as a barrier to flow?
A. Weir
B. Baffles
C. Tie rods
D. Finned tubing
12. What are small-diameter metal rods installed along the tubes?
Process Technology Equipment
Chapter 11 Heat Exchangers
Page 27
A. Weir
B. Baffles
C. Tie rods
D. Finned tubing
13. Which of the following will cause the heat transfer rate to decrease?
A. The surface area decreases.
B. The heat transfer coefficient increases.
C. The temperature difference between the fluids increases.
D. All of the above
14. What flow type occurs when two streams move perpendicular to each other?
A. Cross flow
B. Hybrid flow
C. Parallel flow
D. Laminar flow
Process Technology Equipment
Chapter 11 Heat Exchangers
Page 28
15. What flow type occurs when the fluid flow velocities are low, resulting in
regular flow patterns?
A. Cross flow
B. Hybrid flow
C. Parallel flow
D. Laminar flow
16. What is the most common example of a fluid that has a high probability of
fouling?
A. Coolant
B. Deionized water
C. Cooling water
D. Dielectric fluids
Process Technology Equipment
Chapter 11 Heat Exchangers
Page 29
17. Which of the following is a common cause of excessive chest pressure?
A. High liquid levels
B. Low steam temperature
C. Malfunctioning steam traps
D. An open valve on the steam outlet line
18. Which of the following is a cause of erosion?
A. The removal of metal as a result of a chemical reaction within a process fluid
B. The removal of metal by impingement caused by an abrasive and/or high-velocity
fluid stream
C. Improper material of construction employed in the heat exchanger tube bundle
D. Internal wear on a pump that reduces the performance
Process Technology Equipment
Chapter 11 Heat Exchangers
Page 30
19. Which of the following can cause overpressuring of the heat exchanger?
A. Attempting to place the exchanger in service with the bleed valves open
B. Applying heat to the exchanger without following the proper warm-up procedure
C. Improper alignment of the inlet and outlet valves
D. Opening a cold fluid to a hot heat exchanger
20. Which of the following will not cause downtime due to repair?
A. Attempting to place the exchanger in service with the bleed valves open
B. Operating a heat exchanger with ruptured tubes
C. Improper alignment of the inlet and outlet valves
D. Opening a cold fluid to a hot heat exchanger
21. What could abnormal pressure changes indicate?
A. Fouling
B. Tube plugging
Process Technology Equipment
Chapter 11 Heat Exchangers
C. Internal tube leaks
D. Wear through the tube walls
22. Which of the following is a step in the start-up procedure for a shell-and-tube
heat exchanger where the hot side is being lined up?
A. Verify that all drains and vents are shut.
B. Partially open the hot side inlet valve.
C. Open the cold side outlet valve.
D. Establish the cold stream flow to the heat exchanger.
23. What general maintenance task performed on heat exchangers is a surface
cleaning technique that uses acid to remove scale or other deposits from
accessible surfaces?
A. Acidizing
B. Backwashing
C. Water blasting
D. Sandblasting
Process Technology Equipment
Chapter 11 Heat Exchangers
Page 32
24. What general maintenance task performed on heat exchangers is a surface
cleaning technique involving entraining sand into a stream of high-pressure
air to remove scale or other deposits from accessible surfaces?
A. Acidizing
B. Backwashing
C. Water blasting
D. Sandblasting
1. What is the most common type of heat exchanger?
