ICC U2 UST Decommissioning Exam Questions 2025 |
Actual Questions and Answers Latest Updated 2025
(Graded A+)
1. Under ground _______________ storage systems are not longer needed or suitable for product
storage must be properly disposed of properly - ANSWER-A. Gas
B. Oil
C. Petroleum
D. All of the above
Answer. C
2. All work that is completed at the site must be accomplished in accordance with federal, state, and
local requirements as well as accepted safety standards. - ANSWER-A. True
B. False
Answer: True.
3. All applicable permits must be obtained prior to beginning any work. - ANSWER-A. True
B. False
Answer True.
4. What is the hazard that removers of petroleum tanks are faced with, dangers such as petroleum
hydrocarbon liquids vapor, or waste. - ANSWER-List three
____________ ______________ _______________
5. What are some syntomes of inhaling or obsorbing high levels of petroleum hydorocarbon vapors. -
ANSWER-List three
_____________ _______________ ____________
Dizziness excitement, unconsciousness
6. Artificial resporation should be applied if - ANSWER-A. They hit their head
B. They cant see
C. They have stopped breathing
D. They suffer from cardiac arrest
AnswerC
7. What are three parts of the body should Petroleum liquids be kept away from an example would be
eyes, skin and moulth. - ANSWER-List three
_____________ _________________ ______________
8. Hiogh ocupational exposures to benezene have been associated with various human blood
disorders - ANSWER-True/False
AnswerTrue
9. Smoking matterials or any flamable materials must be reamoved from the job site in order to
prevent - ANSWER-A. People from smoking
B. Sudden compution
C. Second hand smoke
D. Exploshins indide of tanks due to large amounts of vapor
E. B and D
Answer E
,10. What tool with the abbreviation CGI should be used to check for hazardous vapor concentrations.
- ANSWER-_____________________________________
Answer: Combustible gas indicator
11. All tools that are in areas with hazardous vapor concentartions should be shut down or they
should be ________________ proof. - ANSWER-__________________
answer Explosion
12. Undergroud storage tanks are considered temerarially out of service if they are idle but will return
to service in ____ years. - ANSWER-______
answer 1
13. Undergroud storage tanks are considered temerarially out of service if they are - ANSWER-A. Idle
but will return to service within one year
B. Are awaiting abandonement in place
C. Are waiting for reamoval
D. All of the above
Answer D
14. Tanks that are out of service must be - ANSWER-A. Checked routinely
C. Filled with sand
B. Properly secured
D. A and B
Answer B
15. When removing an under ground tank what method for removal is preferred. - ANSWER-A.
Removal of the tank
B. Closure in place
Answer B
16. Choose the reasons that a closure in place would be preferred over a removal. - ANSWER-A.
Because of the tank location, adjacent equipment or structures may be damaged or weakened if the
tank is removed.
B. It would do a lot of damage to the clients lawn
C. Removal is impossible
D. There is no equipment that is capable of removing the tank
E. Removal may incur excessive costs
Answer A, C, E
17. You should remove all stored liquid and ballast the tank by filin git with water when high
_____________ levels occur - ANSWER-________________
Answer Water
18. When temporarily putting a tank out of service what lines should be left open. - ANSWER-
______________ ____________
Vent Lines
19. Lead compounds and other residues in the tank may be classified as_____________ waste. -
ANSWER-A. Collective
B. Controllable
C. Hazardous
D. Corrosive
Answer C
20. Remove liquids and residues from the tank by using ______________ _____________ or air
driven pumps. - ANSWER-A. Safety Reg
B. Explosion Proof
,C.
Answer B
21. If a vacuum truck is used for removal of liquids and residues it should be positioned up
_____________ wind of the tank. - ANSWER-A. Road
B. Mistral
C. Wind
D. B and C
Answer C
22. When filling a tank with sand for a closure in place a nominal amount of water should be used.
Why - ANSWER-
_______________________________________________________________________________
_______________________________________________________________________________
23. Almost a complete filling of the tank can be achieved by filing it with a combination of sand and
________________ - ANSWER-A. Crushed Rock
B. Cachinnate
C. Yerk
D. Earth
Answer D
24. When under ground tanks are disposed in place the owner of the tank should keep a permanent
record of the tank location, the date of disposal in place, and the method of conditioning the tank for
disposal. - ANSWER-Why
____________________________________________________________________________
25. To remove the tank of vapors remove the fill pipe, gauge pipe, vapor recovery truck connection,
submersible pumps, and other tank fixtures. - ANSWER-
26. Vent all vapors from the tank at a minimum height of 12 feet above grade and 3 feet about any
adjacent roof lines until the tank is purged of flammable vapors. - ANSWER-________ feet ________
Feet
27. When purging a tank of gasses the area should be kept free of gases by using ventilation,
specifically an _______________ type air mover. - ANSWER-A. Teacher
B. Osculate
C. Educator
D. Cantankerous
Answer C
28. Fill (drop) tubes must be removed to allow proper _________________ of the air in the tank. -
ANSWER-A. Lugubrious
B. Debauchery
C. Farrago
D. Diffusion
Answer D
29. What is the safest and simplest methods for vapor-freeing a tank. - ANSWER-
_____________________
Answer by adding water.
30. When using water for vapor freeing what is one reason that this method may become prohibited.
- ANSWER-A. The high cost of water
B. Treatment/disposal
C. Transportation of the water
, D. All of the above
Answer B
31. During the prossess of water filling a tank exessive amounts of flammable vapors will be expleed
throught the fill opping. What is one way to temporarily minimize the escape. - ANSWER-A.
Temporarily cap the oppening
B. Using an educator type air mover
C. Fill the tank slowly
D. A and C
Answer A
32. Steam can be used to clean and vapor-free a tank. However, a large ___________
_______________ can build up on the nozzle of the steam jet. This can make steam cleaning
dangerouse and if other meathoses are avalable steam purging should be avoided. - ANSWER-A.
Explosive detonation
B.
33. The tank atmosphere and the excavation area should be regularly tested why. for flammable or
combustible vapor - ANSWER-Answer
For flammable or combustible vapor
34. What device should be used to test the tank - ANSWER-Combustible gas indicator probe into the
fill opening at the bottom
35. Readings ______% or less of the lower flammable limit must be obtained before the tank is
considered safe for removal from the ground. - ANSWER-20%
Answer
36. Thanks should be labeled after removal from the ground but prior to removal from the
______________ - ANSWER-A. Site
B. Abnegation
C. Cleve
D. None of the above
Answer A
37. Warning of certain types of reuse. The former content and present vapor state of each tank
including vapor-freezing treatment and date should be written on the tank in _____ inch high
lettering. - ANSWER-A. 3
B. 2
C. 2 1/2
D. 1
E. 1 1/2
Answer B
38. Tanks that once where declared clean of fule oil could still again some time later show sighnes of
containing fule oil. - ANSWER-True/ False
True
39. Tanks should be tested for flammable liquids before they are _____________. - ANSWER-A.
Denigrated
B. Dispelled
C. Transported
D. A and B
Answer C
40. What are the three things that must be present in order for the fire triangle to work - ANSWER-
Answer Oxygen, fuel, source of ignition
Actual Questions and Answers Latest Updated 2025
(Graded A+)
1. Under ground _______________ storage systems are not longer needed or suitable for product
storage must be properly disposed of properly - ANSWER-A. Gas
B. Oil
C. Petroleum
D. All of the above
Answer. C
2. All work that is completed at the site must be accomplished in accordance with federal, state, and
local requirements as well as accepted safety standards. - ANSWER-A. True
B. False
Answer: True.
3. All applicable permits must be obtained prior to beginning any work. - ANSWER-A. True
B. False
Answer True.
4. What is the hazard that removers of petroleum tanks are faced with, dangers such as petroleum
hydrocarbon liquids vapor, or waste. - ANSWER-List three
____________ ______________ _______________
5. What are some syntomes of inhaling or obsorbing high levels of petroleum hydorocarbon vapors. -
ANSWER-List three
_____________ _______________ ____________
Dizziness excitement, unconsciousness
6. Artificial resporation should be applied if - ANSWER-A. They hit their head
B. They cant see
C. They have stopped breathing
D. They suffer from cardiac arrest
AnswerC
7. What are three parts of the body should Petroleum liquids be kept away from an example would be
eyes, skin and moulth. - ANSWER-List three
_____________ _________________ ______________
8. Hiogh ocupational exposures to benezene have been associated with various human blood
disorders - ANSWER-True/False
AnswerTrue
9. Smoking matterials or any flamable materials must be reamoved from the job site in order to
prevent - ANSWER-A. People from smoking
B. Sudden compution
C. Second hand smoke
D. Exploshins indide of tanks due to large amounts of vapor
E. B and D
Answer E
,10. What tool with the abbreviation CGI should be used to check for hazardous vapor concentrations.
- ANSWER-_____________________________________
Answer: Combustible gas indicator
11. All tools that are in areas with hazardous vapor concentartions should be shut down or they
should be ________________ proof. - ANSWER-__________________
answer Explosion
12. Undergroud storage tanks are considered temerarially out of service if they are idle but will return
to service in ____ years. - ANSWER-______
answer 1
13. Undergroud storage tanks are considered temerarially out of service if they are - ANSWER-A. Idle
but will return to service within one year
B. Are awaiting abandonement in place
C. Are waiting for reamoval
D. All of the above
Answer D
14. Tanks that are out of service must be - ANSWER-A. Checked routinely
C. Filled with sand
B. Properly secured
D. A and B
Answer B
15. When removing an under ground tank what method for removal is preferred. - ANSWER-A.
Removal of the tank
B. Closure in place
Answer B
16. Choose the reasons that a closure in place would be preferred over a removal. - ANSWER-A.
Because of the tank location, adjacent equipment or structures may be damaged or weakened if the
tank is removed.
B. It would do a lot of damage to the clients lawn
C. Removal is impossible
D. There is no equipment that is capable of removing the tank
E. Removal may incur excessive costs
Answer A, C, E
17. You should remove all stored liquid and ballast the tank by filin git with water when high
_____________ levels occur - ANSWER-________________
Answer Water
18. When temporarily putting a tank out of service what lines should be left open. - ANSWER-
______________ ____________
Vent Lines
19. Lead compounds and other residues in the tank may be classified as_____________ waste. -
ANSWER-A. Collective
B. Controllable
C. Hazardous
D. Corrosive
Answer C
20. Remove liquids and residues from the tank by using ______________ _____________ or air
driven pumps. - ANSWER-A. Safety Reg
B. Explosion Proof
,C.
Answer B
21. If a vacuum truck is used for removal of liquids and residues it should be positioned up
_____________ wind of the tank. - ANSWER-A. Road
B. Mistral
C. Wind
D. B and C
Answer C
22. When filling a tank with sand for a closure in place a nominal amount of water should be used.
Why - ANSWER-
_______________________________________________________________________________
_______________________________________________________________________________
23. Almost a complete filling of the tank can be achieved by filing it with a combination of sand and
________________ - ANSWER-A. Crushed Rock
B. Cachinnate
C. Yerk
D. Earth
Answer D
24. When under ground tanks are disposed in place the owner of the tank should keep a permanent
record of the tank location, the date of disposal in place, and the method of conditioning the tank for
disposal. - ANSWER-Why
____________________________________________________________________________
25. To remove the tank of vapors remove the fill pipe, gauge pipe, vapor recovery truck connection,
submersible pumps, and other tank fixtures. - ANSWER-
26. Vent all vapors from the tank at a minimum height of 12 feet above grade and 3 feet about any
adjacent roof lines until the tank is purged of flammable vapors. - ANSWER-________ feet ________
Feet
27. When purging a tank of gasses the area should be kept free of gases by using ventilation,
specifically an _______________ type air mover. - ANSWER-A. Teacher
B. Osculate
C. Educator
D. Cantankerous
Answer C
28. Fill (drop) tubes must be removed to allow proper _________________ of the air in the tank. -
ANSWER-A. Lugubrious
B. Debauchery
C. Farrago
D. Diffusion
Answer D
29. What is the safest and simplest methods for vapor-freeing a tank. - ANSWER-
_____________________
Answer by adding water.
30. When using water for vapor freeing what is one reason that this method may become prohibited.
- ANSWER-A. The high cost of water
B. Treatment/disposal
C. Transportation of the water
, D. All of the above
Answer B
31. During the prossess of water filling a tank exessive amounts of flammable vapors will be expleed
throught the fill opping. What is one way to temporarily minimize the escape. - ANSWER-A.
Temporarily cap the oppening
B. Using an educator type air mover
C. Fill the tank slowly
D. A and C
Answer A
32. Steam can be used to clean and vapor-free a tank. However, a large ___________
_______________ can build up on the nozzle of the steam jet. This can make steam cleaning
dangerouse and if other meathoses are avalable steam purging should be avoided. - ANSWER-A.
Explosive detonation
B.
33. The tank atmosphere and the excavation area should be regularly tested why. for flammable or
combustible vapor - ANSWER-Answer
For flammable or combustible vapor
34. What device should be used to test the tank - ANSWER-Combustible gas indicator probe into the
fill opening at the bottom
35. Readings ______% or less of the lower flammable limit must be obtained before the tank is
considered safe for removal from the ground. - ANSWER-20%
Answer
36. Thanks should be labeled after removal from the ground but prior to removal from the
______________ - ANSWER-A. Site
B. Abnegation
C. Cleve
D. None of the above
Answer A
37. Warning of certain types of reuse. The former content and present vapor state of each tank
including vapor-freezing treatment and date should be written on the tank in _____ inch high
lettering. - ANSWER-A. 3
B. 2
C. 2 1/2
D. 1
E. 1 1/2
Answer B
38. Tanks that once where declared clean of fule oil could still again some time later show sighnes of
containing fule oil. - ANSWER-True/ False
True
39. Tanks should be tested for flammable liquids before they are _____________. - ANSWER-A.
Denigrated
B. Dispelled
C. Transported
D. A and B
Answer C
40. What are the three things that must be present in order for the fire triangle to work - ANSWER-
Answer Oxygen, fuel, source of ignition
