Deck 15: Vessels

Question 1

What is a metal plate, or similar device, placed into the drain line of a cylindrical or cone-shaped vessel?

A) Baffle
B) Mist eliminator
C) Heat tracing
D) Vortex breaker

Answer 1

D
Explanation: A) Incorrect. A baffle a metal plate, placed at strategic positions inside a vessel, that alters the flow of the material in the vessel and can serve to facilitate mixing.
B) Incorrect. A mist eliminator is a device placed in the top of a tank, composed of mesh, vanes, or fibers, that collects droplets of mist (moisture) from gas to prevent it from leaving the tank and moving forward with the process flow.
C) Incorrect. Heat tracing is a coil of heated wire or tubing that is adhered to or wrapped around a pipe in order to maintain or increase the temperature of the process fluid, reduce fluid viscosity, and facilitate flow.
D) Correct. A vortex breaker is a metal plate, or similar device, placed into the drain line of a cylindrical or cone-shaped vessel.

Question 2

What major component of tanks floats upon the surface of the stored liquid and is used to decrease vapor space and reduce potential for evaporation?

A) Blanketing
B) Floating roof
C) Articulated drain
D) Foam chamber

Answer 2

B
Explanation: A) Incorrect. Blanketing is the process of putting an inert gas, usually nitrogen, into the vapor space above the liquid in a tank to prevent air leakage into the tank.
B) Correct. A floating roof floats upon the surface of the stored liquid and is used to decrease vapor space and reduce potential for evaporation.
C) Incorrect. An articulated drain removes water from the roof.
D) Incorrect. A foam chamber is reservoir and piping that contain chemical foam used to extinguish fires within a tank.

Question 3

What is an area located at the bottom of a vessel that receives and temporarily stores drainage from the lowest point in that vessel?

A) Sump
B) Mixer
C) Manway
D) Gauge hatch

Answer 3

A
Explanation: A) Correct. A sump is an area located at the bottom of a vessel that receives and temporarily stores drainage from the lowest point in that vessel.
B) Incorrect. A mixer is a device used to combine chemicals or other substances.
C) Incorrect. A manway is an opening in a vessel that permits entry for inspection and repair.
D) Incorrect. A gauge hatch is an opening on the roof of a tank that is used to check tank levels and obtain samples of the tank contents.

Question 4

What should a process technician do first with rainfall buildup in a containment wall?

A) Open a valve and drain the liquid
B) Test the water to ensure it is free of contaminants
C) Leave the rainwater to cool off the containment wall
D) Use a new containment wall

Question 5

What is a large container or vessel for holding liquids and/or gases?

A) Drum
B) Tank
C) Dryer
D) Filter

Question 6

What type of pressurized tank is used for low-pressure substances?

A) Spherical tank
B) Cylindrical tank
C) Hemispheroid tank
D) Atmospheric tank

Question 7

What is a coil of heated wire or tubing that is adhered to or wrapped around a pipe in order to maintain or increase the temperature of the process fluid, reduce fluid viscosity, and facilitate flow?

A) Baffle
B) Mist eliminator
C) Heat tracing
D) Vortex breaker

Question 8

What is a flat or notched dam or barrier to liquid flow that is normally used either to measure fluid flows or to maintain a given depth of fluid?

A) Weir
B) Boot
C) Baffle
D) Vane separator

Question 9

Which of the following is true of a containment system?

A) They protect wildlife from contaminants
B) They protect against droughts
C) They contain chemical spills in a small area
D) They contain clean rainwater until the spill is contained

Question 10

What is a vessel that typically holds dry solids?

A) Bin
B) Tank
C) Dryer
D) Filter

Question 11

What type of pressurized tank is used for highly volatile, pressurized material?

A) Spherical tank
B) Cylindrical tank
C) Hemispheroid tank
D) Atmospheric tank

Question 12

What is the process of putting an inert gas, usually nitrogen, into the vapor space above the liquid in a tank to prevent air leakage into the tank?

A) Blanketing
B) Floating roof
C) Articulated drain
D) Foam chamber

Question 13

What type of reactor contains a mixer or agitator mounted to the tank?

A) Tubular reactor
B) Fixed bed reactor
C) Stirred tank reactor
D) Fluidized bed reactor

Question 14

What is a device, composed of metal vanes, used to separate liquids from gases or solids from liquids?

A) Weir
B) Boot
C) Baffle
D) Vane separator

Question 15

What is a section at the bottom of a process vessel where water or other unwanted fluid is collected and removed?

A) Weir
B) Boot
C) Baffle
D) Vane separator

Question 16

What type of reaction occurs when complete loads are done start to finish and then removed?

A) Batch reactions
B) Continuous reactions
C) Stirred reactions
D) Inconsistent reactions

Question 17

What protects the environment and people against tank failures?

A) Gauge hatch
B) Containment wall
C) Tank safety system
D) Vapor recovery system

Question 18

What is a vessel containing desiccant and screens across which process streams flow to have moisture (hydrates) removed?

A) Drum
B) Tank
C) Dryer
D) Filter

Question 19

What type of reactor is a reactor vessel in which the catalyst bed is stationary as the reactants are passed over it?

A) Tubular reactor
B) Fixed bed reactor
C) Stirred tank reactor
D) Fluidized bed reactor

Question 20

What type of tank is only for substances that do not contain toxic vapors or high vapor pressure liquids?

A) Atmospheric tanks
B) Pressurized tanks
C) Spherical tanks
D) Hemispheroid tanks

Question 21

Which of the following is the symbol for an open roof tank?

A)
B)
C)
D)

Question 22

What should process technicians feel for on vessels and piping?

A) Heat
B) Water
C) Vapor
D) Coolness

Question 23

Which improper activities will not cause collapse of a tank because of a vacuum?

A) Loss of nitrogen flow
B) Misalignment of blanket systems
C) Emptying a tank
D) Misalignment of pump systems

Question 24

What is a potential production impact of improper valve lineup?

A) Cross contamination
B) Out of specification material
C) Decomposition of material
D) Added cost for cleanup

Question 25

What should process technicians look for when monitoring and maintaining vessels?

A) Check sewer valves
B) Monitor pressure
C) Check firewalls, sumps, and drains
D) All of the above

Question 26

What should process technicians do when maintaining and monitoring vessels?

A) Check auxiliary equipment
B) Listen for abnormal noise
C) Use sniffers to detect gas leaks and vapors
D) All of the above

Question 27

Which of the following is the symbol for a hemispheroid?

A)
B)
C)
D)

Question 28

What is a potential equipment impact of overpressure?

A) Rupture of vessel
B) Damaged pump
C) Vessel could have a weak spot causing a leak
D) Possible corrosion or erosion of the vessel

Question 29

What is a potential equipment impact of misalignment of pump systems?

A) Ruptured vessel
B) Damaged pump
C) Collapse of tank because of vacuum
D) Possible corrosion or erosion of vessel

Question 30

Which of the following is the symbol for a bin?

A)
B)
C)
D)