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Process Technology Equipment
Chapter 15 Vessels
Underpressurization can result in the following consequences:
• Tank vent pluggage during tank emptying
• Nighttime temperatures decrease significantly, causing empty tank implosion
15.4.3 Operating Upsets, and Shutdowns and Start-ups
Time: 1 minute
Resources: Slide 33
Sample Instructor Script:
15.5 Hazards Associated with Improper Operation
Time: 1 minute
Resources: Slide 34
Sample Instructor Script:
Process Technology Equipment
Chapter 15 Vessels
Page 22
15.6 Process Technician’s Role in Operation and Maintenance
Time: 1 minute
Resources: Slide 35
15.6.1 Special Procedures
Time: 1 minute
Resources: Slide 36
Sample Instructor Script:
15.7 Typical Procedures
Time: 0.5 minute
Resources: Slide 37
Process Technology Equipment
Chapter 15 Vessels
Page 23
15.7.1 Start-up Procedures
Time: 0.5 minute
Resources: Slide 38
Sample Instructor Script:
15.7.2 Start-up Procedures (cont.)
Time: 0.5 minute
Resources: Slide 39
Sample Instructor Script:
15.7.3 Shutdown and Emergency Procedures
Time: 0.5 minute
Resources: Slide 40
Process Technology Equipment
Chapter 15 Vessels
15.7.4 Shutdown and Emergency Procedures (cont.)
Time: 0.5 minute
Resources: Slide 41
Sample Instructor Script:
Further steps include:
Summary and Wrap-Up
Time: 4 minutes
Resources: Slide 42
Suggested Student Activities
Process Technology Equipment
Chapter 15 Vessels
Page 25
End of Chapter Review Questions
1. Which of the following is not a factor that affects vessel design and
construction?
A. Volume
B. Altitude
C. Temperature
D. Geographic location
2. What is operating pressure for a code vessel?
A. 0–5 psi
B. 5–10 psi
C. 15–3,000 psi
Process Technology Equipment
Chapter 15 Vessels
D. 3,000–5,000 psi
3. Who regulates the operation of tanks for atmospheric tanks?
A. EPA
B. API
C. ASME
D. OSHA
4. What type of pressure storage tank is used to store material with a vapor
pressure slightly greater than atmospheric pressure?
A. Spheres
B. Spheroids
C. Bullets
D. Hemispheroids
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Chapter 15 Vessels
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5. What vessel is used to transport solids like plastics and grain by rail?
A. Tank car
B. Hopper car
C. Tank truck
D. Spherical car
6. What type of ship is used to transport truck-size storage containers loaded
with products?
A. Tankers
B. Barges
C. Supertankers
D. Container ships
Process Technology Equipment
Chapter 15 Vessels
Page 28
7. What component of a vessel is used to alter the flow of a vessel’s contents,
facilitate mixing, or cause turbulent flow?
A. Baffle
B. Agitator
C. Sump
D. Mist eliminator
8. What component of a vessel allows material to be removed from the bottom of
the tank and the tank to be completely emptied?
A. Baffle
B. Agitator
C. Sump
D. Mist eliminator
9. What pressure relief device should be used in gas service?
A. Safety valves
B. Relief valves
C. Safety relief valves
Process Technology Equipment
Chapter 15 Vessels
D. Rupture discs
10. Which of the following is a purpose of a containment wall?
A. Facilitate cleanup after a release of hazardous material
B. Protect the environment and people against tank failures
C. Protect a group of vessels
D. All of the above
Process Technology Equipment
Chapter 15 Vessels
Page 30
11. Which of the following is true when putting a vessel in service?
A. The pressure should be set at the highest level.
B. The temperature needs to be increased gradually.
C. The liquid should be placed into the vessel as quickly as possible.
D. All of the above
12. Which of the following may cause a tank to rupture?
A. Corrosion
B. Scale buildup
C. Underpressurization
D. Overpressurization
Process Technology Equipment
Chapter 15 Vessels
13. Which of the following may affect the quality or purity of the vessel’s
contents?
A. Corrosion
B. Scale buildup
C. Underpressurization
D. Overpressurization
14. Which of the following can cause damage to the pump?
A. Overfilling
B. Overpressurization
C. Misalignment of pump systems
D. Misalignment of blanket systems
15. Which of the following hazards can cause the vessel to rupture?
A. Overpressurization
B. Pulling a vacuum on a tank while emptying
C. Putting wrong or off-spec material in a vessel
D. Misalignment of pump systems
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Chapter 15 Vessels
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16. Which of the following leads to cleanup costs?
A. Overfilling
B. Pulling a vacuum on a tank while emptying
C. Putting wrong or off-spec material in a vessel
D. All of the above
17. Which of the following is the symbol for a reactor?
A.
B.
C.
D.
Process Technology Equipment
Chapter 15 Vessels
18. Which of the following is the symbol for an elliptical tank?
A.
B.
C.
D.
19. Which of the following is the symbol for an internal floating roof tank?
