Process Technology Equipment Chapter 14 Boilers
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Objective: 14.1 Identify the components of boilers and the purpose of boilers in the
process industries
Blooms Level: Understand
4. Which of the following is one of the most common steam trap designs?
A. Functional trap
B. Pressure trap
C. Physical trap
D. Thermostatic trap
5. Which of the following is the hot water line in a water tube boiler?
A. Riser tube
B. Radiant tube
C. Downcomer tube
D. Superheated tube
6. What component of a water tube boiler controls the flow of air to the burners
to maintain the correct fuel-to-air ratio?
Process Technology Equipment Chapter 14 Boilers
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A. Air register
B. Draft fans
C. Desuperheater
D. Burners
7. What component of a water tube boiler is a temperature control point at the
outlet of the boiler steam flow that maintains a specific steam temperature by
using boiler feedwater injection through a control valve?
A. Air register
B. Draft fans
C. Desuperheater
D. Burners
8. Which of the following is a use for superheated steam?
A. Driving furnaces
B. Catalytic cracking
C. Product quality improvement
D. Maintenance of steam pressures and temperatures over short distances
Process Technology Equipment Chapter 14 Boilers
9. What type of steam is steam that has been heated to a temperature above its
saturated temperature?
A. Boiler steam
B. Saturated steam
C. Superheated steam
D. Desuperheated steam
10. What water treatment method is the treatment of water to remove dissolved
mineral salts such as calcium and magnesium?
A. Softening
B. Coagulation
C. Deaeration
D. Filtration
Process Technology Equipment Chapter 14 Boilers
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13. What problem can be caused by a change in the composition of the fuel?
A. Overheating
B. Power outage
C. Increased soot deposits
D. Formation of scale in the tubes
14. What can significantly affect the tube life in a boiler?
A. Temperature of the feedwater
B. Quantity of the feedwater
C. Quality of the feedwater
D. Source of the feedwater
15. Which of the following hazards can cause loss of downstream equipment use?
A. Failing to purge the firebox
B. Poor control of excess air
C. Loss of boiler feedwater
Process Technology Equipment Chapter 14 Boilers
D. Loss of fuel gas or oil
16. Which of the following hazards can cause an explosion in the firebox?
A. Failing to purge the firebox
B. Poor control of excess air
C. Loss of boiler feedwater
D. Loss of fuel gas or oil
17. When should a boiler be purged?
A. After light-off
B. After a misfire
C. After an increase of burner flame
D. After shutdown
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18. Which of the following should process technicians look for when maintaining
a boiler?
A. Temperature gradient
B. Burner balance
C. Smoke at the boiler stack
D. All of the above
19. What noise can indicate an improper draft operation?
A. Puffing
B. Squeaking
C. Screeching
D. Squealing
20. Which of the following is a step in the typical start-up procedure of a boiler?
A. Inspect the outside of the boiler for loose flanges.
B. Shut off the fuel.
C. Shut off the steam.
D. Gradually reduce the firing and the process flow.
Process Technology Equipment Chapter 14 Boilers
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21. Which of the following should an outside operator do in an emergency?
A. Block in the burners
B. Block in the fuel
C. Stop all pumps
D. All of the above
1. What component of a boiler consists of valves, fittings, piping, and
connections suitable for the pressure of the steam being transported?
A. Burners
B. Boiler feedwater system
C. Economizer
D. Steam distribution system
Process Technology Equipment Chapter 14 Boilers
2. What type of boiler is most commonly used in the process industries?
A. Water tube
B. Waste heat
C. Fire tube
D. Steam tube
3. Which of the following is true of waste heat boilers?
A. They improve efficiency.
B. They cost more money.
C. They require specialized training.
D. They required additional personnel.
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1. Define the following terms:
a. Superheated steam
b. Saturated steam
c. Blowdown
d. Fire tube boiler
e. Water tube boiler
f. Waste heat boiler
2. (True or False) Boilers deliver steam to a process at a desired pressure and
temperature that is used throughout the process facility.
3. List three examples of process equipment that use steam energy.
Process Technology Equipment Chapter 14 Boilers
4. The common component(s) on a boiler is(are) (select all that apply):
a. radiant tubes
b. burners
c. a bridgewall
d. a firebox
5. What type of boiler consists of a shell and a series of steel tubes that transfer
heat through a combustion chamber into the horizontal fire tubes?
a. Water tube boiler
b. Waste heat boiler
c. Fire tube boiler
