UST INSPECTOR EXAM SCRIPT TESTED
QUESTIONS AND SOLUTIONS
CERTIFICATION EVALUATION
●● What is the purpose of PEI/RP100-20?
Answer: It provides guidelines for UST installation including
excavation, bedding, backfill, anchoring, piping, corrosion protection,
and initial testing.
●● What should you memorize first according to the Master Study
Guide?
Answer: The 'Master Numbers' near the end of the guide.
●● What is the flash point of Class IA liquids?
Answer: Below 73°F.
●● What is the boiling point range for Class IB liquids?
Answer: Below 73°F and 100°F or higher.
●● What is the oxygen-deficient threshold for safety?
Answer: Less than 19.5% O₂.
,●● What is the key point of the fire triangle?
Answer: Fuel + Oxygen + Ignition.
●● What is the gasoline flash point?
Answer: Approximately 45°F.
●● What is the required tank-to-tank spacing according to PEI/RP100-
20?
Answer: 2 feet.
●● What is the minimum bedding requirement for tanks?
Answer: 1 foot.
●● What should be done before entering a confined space?
Answer: Plan, isolate hazards, test atmosphere, ventilate, use required
PPE, continuously monitor, maintain communication, and prepare rescue
procedures.
●● What is the maximum pressure for a single-wall tank air test?
Answer: 3-5 psig; do not exceed 5 psig.
●● What is the bonding requirement?
Answer: Object to object.
, ●● What is the grounding requirement?
Answer: Object to earth.
●● What is the purpose of purging in safety procedures?
Answer: To reduce fuel concentration.
●● What is the recommended distance for a spoil pile from the
excavation edge?
Answer: At least 2 feet.
●● What is the average soil slope illustrated in the guide?
Answer: 1:1 or 45°.
●● What should be avoided when handling tanks?
Answer: Do not drop, drag, roll, or handle tanks with sharp objects.
●● What is the purpose of continuous atmospheric monitoring?
Answer: To ensure safety in environments with flammable vapors and
oxygen-deficiency hazards.
●● What should backfill be like according to the guide?
QUESTIONS AND SOLUTIONS
CERTIFICATION EVALUATION
●● What is the purpose of PEI/RP100-20?
Answer: It provides guidelines for UST installation including
excavation, bedding, backfill, anchoring, piping, corrosion protection,
and initial testing.
●● What should you memorize first according to the Master Study
Guide?
Answer: The 'Master Numbers' near the end of the guide.
●● What is the flash point of Class IA liquids?
Answer: Below 73°F.
●● What is the boiling point range for Class IB liquids?
Answer: Below 73°F and 100°F or higher.
●● What is the oxygen-deficient threshold for safety?
Answer: Less than 19.5% O₂.
,●● What is the key point of the fire triangle?
Answer: Fuel + Oxygen + Ignition.
●● What is the gasoline flash point?
Answer: Approximately 45°F.
●● What is the required tank-to-tank spacing according to PEI/RP100-
20?
Answer: 2 feet.
●● What is the minimum bedding requirement for tanks?
Answer: 1 foot.
●● What should be done before entering a confined space?
Answer: Plan, isolate hazards, test atmosphere, ventilate, use required
PPE, continuously monitor, maintain communication, and prepare rescue
procedures.
●● What is the maximum pressure for a single-wall tank air test?
Answer: 3-5 psig; do not exceed 5 psig.
●● What is the bonding requirement?
Answer: Object to object.
, ●● What is the grounding requirement?
Answer: Object to earth.
●● What is the purpose of purging in safety procedures?
Answer: To reduce fuel concentration.
●● What is the recommended distance for a spoil pile from the
excavation edge?
Answer: At least 2 feet.
●● What is the average soil slope illustrated in the guide?
Answer: 1:1 or 45°.
●● What should be avoided when handling tanks?
Answer: Do not drop, drag, roll, or handle tanks with sharp objects.
●● What is the purpose of continuous atmospheric monitoring?
Answer: To ensure safety in environments with flammable vapors and
oxygen-deficiency hazards.
●● What should backfill be like according to the guide?
