ICC U1 UNDERGROUND STORAGE TANK INSTALLER
EXAM QUESTIONS AND CORRECT ANSWERS (
1000% VERIFIED ANSWERS) Q&A 2026 |INSTANT
DOWNLOAD PDF
1. What is the primary purpose of an underground storage tank (UST) system?
A. To store rainwater
B. To store regulated liquids safely below ground
C. To increase fuel evaporation
D. To reduce pumping costs only
Correct answer: B
Rationale: UST systems are designed to safely store regulated substances such as fuel and
chemicals underground while minimizing environmental risk.
2. Which agency primarily regulates UST systems in the United States?
A. OSHA
B. EPA
C. ICC
D. FEMA
Correct answer: B
Rationale: The Environmental Protection Agency (EPA) sets federal regulations for underground
storage tanks under 40 CFR Part 280.
3. What is required before installing an underground storage tank?
A. Soil testing only
B. Written permit approval
C. Fuel delivery contract
D. Electrical connection approval
,Correct answer: B
Rationale: Installation of UST systems requires proper permits from local or state authorities
before any work begins.
4. What is the minimum burial depth requirement influenced by?
A. Tank color
B. Manufacturer preference only
C. Frost line and structural load
D. Pump type
Correct answer: C
Rationale: Burial depth depends on frost depth, soil conditions, and structural loads to protect
the tank.
5. What material is commonly used for modern USTs?
A. Wood
B. Fiberglass reinforced plastic (FRP)
C. Cardboard composite
D. Aluminum foil
Correct answer: B
Rationale: FRP and steel with corrosion protection are commonly used due to strength and
durability.
6. What is cathodic protection used for in UST systems?
A. Increase fuel flow
B. Prevent corrosion of metal tanks
C. Reduce installation cost
D. Increase tank pressure
Correct answer: B
Rationale: Cathodic protection prevents electrochemical corrosion of metal components.
7. Which test is used to detect leaks in UST systems?
, A. Wind test
B. Hydrostatic or precision leak test
C. Color test
D. Magnetic field test only
Correct answer: B
Rationale: Leak detection uses hydrostatic, pressure, or electronic precision testing methods.
8. What is required between the tank and soil?
A. Plastic wrapping only
B. Backfill material
C. Paint coating
D. Concrete paint layer only
Correct answer: B
Rationale: Proper backfill such as sand or pea gravel prevents tank damage and supports
structure.
9. Which is a major environmental risk of UST failure?
A. Air noise pollution
B. Soil and groundwater contamination
C. Increased rainfall
D. Electrical surges
Correct answer: B
Rationale: Leaking tanks can contaminate soil and groundwater with hazardous substances.
10. What is a double-walled tank designed for?
A. Faster fuel delivery
B. Secondary containment for leaks
C. Easier installation
D. Reduced weight
Correct answer: B
Rationale: Double-walled tanks provide secondary containment to detect and prevent leaks.
EXAM QUESTIONS AND CORRECT ANSWERS (
1000% VERIFIED ANSWERS) Q&A 2026 |INSTANT
DOWNLOAD PDF
1. What is the primary purpose of an underground storage tank (UST) system?
A. To store rainwater
B. To store regulated liquids safely below ground
C. To increase fuel evaporation
D. To reduce pumping costs only
Correct answer: B
Rationale: UST systems are designed to safely store regulated substances such as fuel and
chemicals underground while minimizing environmental risk.
2. Which agency primarily regulates UST systems in the United States?
A. OSHA
B. EPA
C. ICC
D. FEMA
Correct answer: B
Rationale: The Environmental Protection Agency (EPA) sets federal regulations for underground
storage tanks under 40 CFR Part 280.
3. What is required before installing an underground storage tank?
A. Soil testing only
B. Written permit approval
C. Fuel delivery contract
D. Electrical connection approval
,Correct answer: B
Rationale: Installation of UST systems requires proper permits from local or state authorities
before any work begins.
4. What is the minimum burial depth requirement influenced by?
A. Tank color
B. Manufacturer preference only
C. Frost line and structural load
D. Pump type
Correct answer: C
Rationale: Burial depth depends on frost depth, soil conditions, and structural loads to protect
the tank.
5. What material is commonly used for modern USTs?
A. Wood
B. Fiberglass reinforced plastic (FRP)
C. Cardboard composite
D. Aluminum foil
Correct answer: B
Rationale: FRP and steel with corrosion protection are commonly used due to strength and
durability.
6. What is cathodic protection used for in UST systems?
A. Increase fuel flow
B. Prevent corrosion of metal tanks
C. Reduce installation cost
D. Increase tank pressure
Correct answer: B
Rationale: Cathodic protection prevents electrochemical corrosion of metal components.
7. Which test is used to detect leaks in UST systems?
, A. Wind test
B. Hydrostatic or precision leak test
C. Color test
D. Magnetic field test only
Correct answer: B
Rationale: Leak detection uses hydrostatic, pressure, or electronic precision testing methods.
8. What is required between the tank and soil?
A. Plastic wrapping only
B. Backfill material
C. Paint coating
D. Concrete paint layer only
Correct answer: B
Rationale: Proper backfill such as sand or pea gravel prevents tank damage and supports
structure.
9. Which is a major environmental risk of UST failure?
A. Air noise pollution
B. Soil and groundwater contamination
C. Increased rainfall
D. Electrical surges
Correct answer: B
Rationale: Leaking tanks can contaminate soil and groundwater with hazardous substances.
10. What is a double-walled tank designed for?
A. Faster fuel delivery
B. Secondary containment for leaks
C. Easier installation
D. Reduced weight
Correct answer: B
Rationale: Double-walled tanks provide secondary containment to detect and prevent leaks.
