Wisconsin Liquefied Gas Supplier
Restricted Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. What is the primary purpose of a liquefied petroleum gas (LP-Gas)
supplier license?
A. To manufacture gasoline engines
B. To install residential wiring systems
C. To safely handle, store, and deliver LP-Gas to customers
D. To inspect automobile brakes
Correct Answer: C. To safely handle, store, and deliver LP-Gas to customers
Rationale: LP-Gas supplier licensing ensures individuals understand safe
handling, storage, delivery, and regulatory requirements for propane and
other liquefied gases.
,2. LP-Gas is commonly stored as a liquid because:
A. It cannot burn as a vapor
B. It occupies less space as a liquid
C. It becomes nonflammable
D. It loses pressure completely
Correct Answer: B. It occupies less space as a liquid
Rationale: Propane and similar gases are compressed into liquid form to
allow efficient storage and transportation.
3. The odorant added to LP-Gas is primarily used to:
A. Increase heating value
B. Reduce tank pressure
C. Help detect leaks
D. Prevent freezing
Correct Answer: C. Help detect leaks
Rationale: LP-Gas is naturally odorless, so odorants such as ethyl
mercaptan are added to help people identify leaks.
4. The greatest hazard associated with an LP-Gas leak is:
A. Water contamination
B. Fire or explosion
,C. Rust formation
D. Reduced odor
Correct Answer: B. Fire or explosion
Rationale: LP-Gas vapor can ignite when mixed with air and exposed to an
ignition source.
5. LP-Gas vapor is:
A. Lighter than air
B. Heavier than air
C. Nonflammable
D. Always visible
Correct Answer: B. Heavier than air
Rationale: Propane vapor is heavier than air and may collect in low areas
such as basements, drains, and pits.
6. Before filling an LP-Gas container, a supplier should:
A. Ignore container condition
B. Verify the container is approved and safe
C. Fill until liquid leaks out
D. Remove all safety devices
Correct Answer: B. Verify the container is approved and safe
, Rationale: Containers must be inspected and suitable for service before
filling to prevent accidents.
7. The maximum permitted filling level of many LP-Gas containers allows
space for:
A. Water expansion
B. Vapor expansion
C. Rust growth
D. Odor removal
Correct Answer: B. Vapor expansion
Rationale: Containers are not filled completely with liquid because LP-Gas
expands as temperature increases.
8. A supplier should stop filling a container if:
A. The customer requests faster filling
B. The container appears damaged
C. The weather is cloudy
D. The hose is clean
Correct Answer: B. The container appears damaged
Rationale: Damaged containers may fail under pressure and must not be
filled until evaluated.
Restricted Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of a liquefied petroleum gas (LP-Gas)
supplier license?
A. To manufacture gasoline engines
B. To install residential wiring systems
C. To safely handle, store, and deliver LP-Gas to customers
D. To inspect automobile brakes
Correct Answer: C. To safely handle, store, and deliver LP-Gas to customers
Rationale: LP-Gas supplier licensing ensures individuals understand safe
handling, storage, delivery, and regulatory requirements for propane and
other liquefied gases.
,2. LP-Gas is commonly stored as a liquid because:
A. It cannot burn as a vapor
B. It occupies less space as a liquid
C. It becomes nonflammable
D. It loses pressure completely
Correct Answer: B. It occupies less space as a liquid
Rationale: Propane and similar gases are compressed into liquid form to
allow efficient storage and transportation.
3. The odorant added to LP-Gas is primarily used to:
A. Increase heating value
B. Reduce tank pressure
C. Help detect leaks
D. Prevent freezing
Correct Answer: C. Help detect leaks
Rationale: LP-Gas is naturally odorless, so odorants such as ethyl
mercaptan are added to help people identify leaks.
4. The greatest hazard associated with an LP-Gas leak is:
A. Water contamination
B. Fire or explosion
,C. Rust formation
D. Reduced odor
Correct Answer: B. Fire or explosion
Rationale: LP-Gas vapor can ignite when mixed with air and exposed to an
ignition source.
5. LP-Gas vapor is:
A. Lighter than air
B. Heavier than air
C. Nonflammable
D. Always visible
Correct Answer: B. Heavier than air
Rationale: Propane vapor is heavier than air and may collect in low areas
such as basements, drains, and pits.
6. Before filling an LP-Gas container, a supplier should:
A. Ignore container condition
B. Verify the container is approved and safe
C. Fill until liquid leaks out
D. Remove all safety devices
Correct Answer: B. Verify the container is approved and safe
, Rationale: Containers must be inspected and suitable for service before
filling to prevent accidents.
7. The maximum permitted filling level of many LP-Gas containers allows
space for:
A. Water expansion
B. Vapor expansion
C. Rust growth
D. Odor removal
Correct Answer: B. Vapor expansion
Rationale: Containers are not filled completely with liquid because LP-Gas
expands as temperature increases.
8. A supplier should stop filling a container if:
A. The customer requests faster filling
B. The container appears damaged
C. The weather is cloudy
D. The hose is clean
Correct Answer: B. The container appears damaged
Rationale: Damaged containers may fail under pressure and must not be
filled until evaluated.
