1|Page
Class A/B Operator Underground Storage Exam 2025/
2026 – Complete Test Bank with Answers|| VERIFIED
EXAM!!!
Tank tightness testing, or another test of equivalent
performance, shall be capable of detecting X gallon per
hour leak rate from any portion of the tank while
accounting for the effects of thermal expansion or the
contraction of the product, vapor pockets, tank
deformation, evaporation or condensation, and the
location of the water table. X is: - ANSWER-0.1 gallons
per hour
MUSTR requires that X soil borings to be taken as close
as practical to the bottom of the UST, but no more than 5
feet away from the tank, nor more than 2 feet below the
tank. X is: - ANSWER-2 soil borings
The results of site assessments conductedper MUSTR R
29.2155 are required to be kept by the owner for not less
than X years. X is: - ANSWER-3 years
Which National Leak Prevention Association Standard on
lining of USTs is adopted by reference in the MUSTR? -
ANSWER-631
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MUSTR requires what to happen with a UST before it is
removed from the ground or closed in place? - ANSWER-
Is registered and all fees are paid
When using secondary containment with interstitial
monitor must be checked at least once every... -
ANSWER-30 days
A manual tank gauge stick must be marked to the nearest:
- ANSWER-1/8 inch
Records of tank and piping tightness testing should be
maintained for: - ANSWER-5 years
Class C Operators should know: - ANSWER-How to
respond to emergencies at the facility
If LARA determines that a UST system is out of
compliance with state and federal regualtions, the
__________ for that UST system must. be retrained. -
ANSWER-Class A Operator
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Which UST operators are responsible for maintaining
compliance with federal, state, and local regulations? -
ANSWER-Class A Operator
Which description best describes a Class B Operator? -
ANSWER-Individuals focused on day-to-day aspects of
operating, maintaining, and record keeping at the locations
he or she is responsible for
Class A Operators must take and pass the ICC Class A
Operator Exam every _______. - ANSWER-5 years
How often must Class B Operators conduct a site
inspection of the facility to determine compliance? -
ANSWER-Quarterly
In a pressurized pump system, where is the pump
located? - ANSWER-In the tank
Stage I vapor recovery is a method of preventing vapors
from escaping into the enviornment by doing what? -
ANSWER-During the fuel delivery process the fuel tanker
returns vapors back into the delivery truck
Class A/B Operator Underground Storage Exam 2025/
2026 – Complete Test Bank with Answers|| VERIFIED
EXAM!!!
Tank tightness testing, or another test of equivalent
performance, shall be capable of detecting X gallon per
hour leak rate from any portion of the tank while
accounting for the effects of thermal expansion or the
contraction of the product, vapor pockets, tank
deformation, evaporation or condensation, and the
location of the water table. X is: - ANSWER-0.1 gallons
per hour
MUSTR requires that X soil borings to be taken as close
as practical to the bottom of the UST, but no more than 5
feet away from the tank, nor more than 2 feet below the
tank. X is: - ANSWER-2 soil borings
The results of site assessments conductedper MUSTR R
29.2155 are required to be kept by the owner for not less
than X years. X is: - ANSWER-3 years
Which National Leak Prevention Association Standard on
lining of USTs is adopted by reference in the MUSTR? -
ANSWER-631
,2|Page
MUSTR requires what to happen with a UST before it is
removed from the ground or closed in place? - ANSWER-
Is registered and all fees are paid
When using secondary containment with interstitial
monitor must be checked at least once every... -
ANSWER-30 days
A manual tank gauge stick must be marked to the nearest:
- ANSWER-1/8 inch
Records of tank and piping tightness testing should be
maintained for: - ANSWER-5 years
Class C Operators should know: - ANSWER-How to
respond to emergencies at the facility
If LARA determines that a UST system is out of
compliance with state and federal regualtions, the
__________ for that UST system must. be retrained. -
ANSWER-Class A Operator
, 3|Page
Which UST operators are responsible for maintaining
compliance with federal, state, and local regulations? -
ANSWER-Class A Operator
Which description best describes a Class B Operator? -
ANSWER-Individuals focused on day-to-day aspects of
operating, maintaining, and record keeping at the locations
he or she is responsible for
Class A Operators must take and pass the ICC Class A
Operator Exam every _______. - ANSWER-5 years
How often must Class B Operators conduct a site
inspection of the facility to determine compliance? -
ANSWER-Quarterly
In a pressurized pump system, where is the pump
located? - ANSWER-In the tank
Stage I vapor recovery is a method of preventing vapors
from escaping into the enviornment by doing what? -
ANSWER-During the fuel delivery process the fuel tanker
returns vapors back into the delivery truck
