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Process Technology Equipment
Chapter 15 Vessels
Page 34
A.
B.
C.
D.
20. Which of the following is the symbol for an open roof tank?
A.
B.
C.
Process Technology Equipment
Chapter 15 Vessels
Page 35
D.
21. Which of the following steps should be completed when returning a storage
tank to service?
A. Open roof drains on external floating roof tanks.
B. Check to see that all manways are in place.
C. Inspect for leaks by hydrotesting the tank.
D. All of the above
1. Which of the following can be stored in an atmospheric tank?
Process Technology Equipment
Chapter 15 Vessels
A. Toxic vapors
B. Raw materials
C. Toxic liquids
D. High vapor pressure liquids
2. Who governs the design and construction standards for pressure storage
tanks?
A. EPA
B. API
C. ASME
D. OSHA
Process Technology Equipment
Chapter 15 Vessels
3. What is the most common construction material for the shell of a vessel?
A. Plastic
B. Steel
C. Copper
D. Bronze
4. What pressure relief device can be used in both gas or liquid service?
A. Safety valves
B. Relief valves
C. Safety relief valves
D. Rupture discs
5. Which of the following should occur to prepare a vessel for maintenance?
A. The plant must be shut down.
B. The supervisor must complete the preparation steps.
C. The vessel must be isolated from all types of hazardous energy.
D. The vessel must be cleaned.
Process Technology Equipment
Chapter 15 Vessels
Page 38
Process Technology Equipment
Chapter 15 Vessels
Page 39
Process Technology Equipment
Chapter 15 Vessels
Checking Your Knowledge IM Answer Key
1. Define the following terms:
a. Articulated drain
b. Baffle
c. Blanketing
d. Boot
e. Containment wall
f. Floating roof
g. Gauge hatch
h. Manway
i. Mist eliminator
j. Sump
k. Vortex breaker
l. Weir
Process Technology Equipment
Chapter 15 Vessels
Page 41
2. Name four factors that impact decisions regarding vessel design and
construction.
3. Which of the following vessels would be the most appropriate choice for
storing volatile substances under high pressure?
a. Spherical
b. Bullet
c. Atmospheric
d. Hemispheroid
4. What is used for bulk storage or transport of dry materials?
a. Weirs
b. Dryers
c. Hoppers
d. Downcomers
Process Technology Equipment
Chapter 15 Vessels
5. Which of the following types of storage containers is used to transport liquid
across roadways?
a. Tank car
b. Tank truck
c. Container ship
d. Tanker
6. A ___________ is a metal plate or similar device placed inside a cylindrical or
cone-shaped vessel to prevent a cyclone-like rotation from being created as
the fluid is drawn out of the vessel.
a. sump
b. manway
c. mist eliminator
d. vortex breaker
Process Technology Equipment
Chapter 15 Vessels
Page 43
7. List three differences between safety valves and relief valves.
8. (True/False) When putting a vessel into service, the pressure should be
increased quickly to operating pressure.
9. Which of the following can be caused by rapid temperature changes? (Select
all that apply.)
a. Crack welds
b. Cross-contamination
c. Damage to vessels
d. Damage to internal components
Process Technology Equipment
Chapter 15 Vessels
Page 44
10. (True/False) Accurate vessel wall thickness measurements may be made
while the vessel is empty and clean.
11. Which of the following can accelerate corrosion rates and damage vessels by
overheating?
a. Overpressurization
b. Underpressurization
c. A vacuum within the vessel
d. Changes in operating temperatures
12. Which of the following hazards can lead to lost product? (Select all that apply.)
a. Overfilling
b. Misalignment of blanket system
c. Misalignment of pump systems
d. Pulling a vacuum on a tank while emptying
Process Technology Equipment
Chapter 15 Vessels
Process Technology Equipment
Chapter 15 Vessels
Page 46
16. Match the following steps with the correct procedure.
1. Inspect for leaks by hydrotesting the
tank.
a. Start-up
2. Close and seal water draw valves.
b. Shutdown
3. Confirm that all of the liquid has been
removed from the vessel.
4. Open roof drains on external floating
roof tanks.
