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South Carolina (SC) LP-Gas Dealer/Installer
Examination | Latest Verified Questions and
Detailed Answers
OVERVIEW DESCRIPTION:
This comprehensive set of multiple choice questions is designed for the South Carolina LP-
Gas Dealer/Installer Examination, a professional credentialing assessment that evaluates a
candidate's competency in the safe and code-compliant handling, installation, and
management of liquefied petroleum gas systems. The content is meticulously structured
around critical industry knowledge areas, including the physical and chemical properties of
propane, the application of NFPA 58 and NFPA 54 codes, and the specific operational
requirements for ASME tanks and DOT cylinders, such as filling densities, overfill
protection, and siting distances. Furthermore, the examination material delves into the
technical specifications for high- and low-pressure piping systems, regulator functions, leak
detection methodologies, and emergency response procedures. It also ensures a thorough
understanding of the administrative rules and statutes specific to South Carolina, reflecting
the legal and safety obligations of dealers and installers within the state. Administered
under the authority of the South Carolina Liquefied Petroleum Gas Board, this assessment
serves to verify that professionals possess the necessary expertise to protect public safety
through proper system design, installation, and maintenance.
QUESTION 1
According to NFPA 58, what is the maximum allowable filling density for propane in a
container?
A) 80% by volume
B) 90% by volume
C) 50% by weight
D) 42% by volume
CORRECT ANSWER: A
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EXPERT RATIONALE:
Propane's high coefficient of expansion requires a vapor space for safety. Filling to 80%
of the container's water capacity leaves the necessary room for liquid expansion due to
temperature changes.
QUESTION 2
What is the primary odorant added to propane to make it detectable?
A) Methane
B) Ethyl Mercaptan
C) Hydrogen Sulfide
D) Carbon Monoxide
CORRECT ANSWER: B
EXPERT RATIONALE:
Ethyl mercaptan is the standard odorant used because it has a very distinctive,
unpleasant smell (like rotten eggs) that is easily detectable at low concentrations. This is
a critical safety requirement for consumer-grade propane.
QUESTION 3
An appliance installed in a residential garage must have its main burner and pilot
located at least how many inches above the floor?
A) 6 inches
B) 12 inches
C) 18 inches
D) 24 inches
CORRECT ANSWER: C
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EXPERT RATIONALE:
NFPA 54 requires an 18-inch clearance from the floor to the ignition source. This is to
prevent the ignition of heavier-than-air flammable vapors, like gasoline, that may
accumulate near the floor.
QUESTION 4
Which type of container is typically used for permanent, above-ground residential
propane storage?
A) DOT cylinder
B) ASME tank
C) ISO container
D) Carboy
CORRECT ANSWER: B
EXPERT RATIONALE:
ASME tanks are designed for permanent installation and are built to the American
Society of Mechanical Engineers code. DOT cylinders, on the other hand, are designed
for transportation and are often used for temporary applications like forklifts or grills.
QUESTION 5
What is the purpose of an excess flow valve (EFV)?
A) To regulate system pressure
B) To stop the flow of gas if a downstream line ruptures
C) To allow for easy filling of the container
D) To vent excess pressure from the container
CORRECT ANSWER: B
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EXPERT RATIONALE:
An excess flow valve is a safety device that automatically closes when the flow rate
exceeds a predetermined limit. This rapid flow indicates a major leak or line break, and
closing prevents a large, uncontrolled release of gas.
QUESTION 6
What is the state agency that regulates the LP-Gas industry in South Carolina?
A) The South Carolina Department of Transportation
B) The South Carolina Public Service Commission
C) The South Carolina Liquefied Petroleum Gas Board
D) The South Carolina Department of Health and Environmental Control
CORRECT ANSWER: C
EXPERT RATIONALE:
The South Carolina Liquefied Petroleum Gas Board is the specific state body tasked with
overseeing and regulating LP-Gas dealers, installers, and operations. Their authority
comes from state statutes and they are responsible for licensing and enforcement.
QUESTION 7
During a pressure test of a new propane piping system, what is the minimum acceptable
test pressure?
A) 1.5 times the operating pressure
B) 3 times the operating pressure, but not less than 3 psig
C) 10 psig
D) 25 psig
CORRECT ANSWER: B
South Carolina (SC) LP-Gas Dealer/Installer
Examination | Latest Verified Questions and
Detailed Answers
OVERVIEW DESCRIPTION:
This comprehensive set of multiple choice questions is designed for the South Carolina LP-
Gas Dealer/Installer Examination, a professional credentialing assessment that evaluates a
candidate's competency in the safe and code-compliant handling, installation, and
management of liquefied petroleum gas systems. The content is meticulously structured
around critical industry knowledge areas, including the physical and chemical properties of
propane, the application of NFPA 58 and NFPA 54 codes, and the specific operational
requirements for ASME tanks and DOT cylinders, such as filling densities, overfill
protection, and siting distances. Furthermore, the examination material delves into the
technical specifications for high- and low-pressure piping systems, regulator functions, leak
detection methodologies, and emergency response procedures. It also ensures a thorough
understanding of the administrative rules and statutes specific to South Carolina, reflecting
the legal and safety obligations of dealers and installers within the state. Administered
under the authority of the South Carolina Liquefied Petroleum Gas Board, this assessment
serves to verify that professionals possess the necessary expertise to protect public safety
through proper system design, installation, and maintenance.
QUESTION 1
According to NFPA 58, what is the maximum allowable filling density for propane in a
container?
A) 80% by volume
B) 90% by volume
C) 50% by weight
D) 42% by volume
CORRECT ANSWER: A
,2|Page
EXPERT RATIONALE:
Propane's high coefficient of expansion requires a vapor space for safety. Filling to 80%
of the container's water capacity leaves the necessary room for liquid expansion due to
temperature changes.
QUESTION 2
What is the primary odorant added to propane to make it detectable?
A) Methane
B) Ethyl Mercaptan
C) Hydrogen Sulfide
D) Carbon Monoxide
CORRECT ANSWER: B
EXPERT RATIONALE:
Ethyl mercaptan is the standard odorant used because it has a very distinctive,
unpleasant smell (like rotten eggs) that is easily detectable at low concentrations. This is
a critical safety requirement for consumer-grade propane.
QUESTION 3
An appliance installed in a residential garage must have its main burner and pilot
located at least how many inches above the floor?
A) 6 inches
B) 12 inches
C) 18 inches
D) 24 inches
CORRECT ANSWER: C
,3|Page
EXPERT RATIONALE:
NFPA 54 requires an 18-inch clearance from the floor to the ignition source. This is to
prevent the ignition of heavier-than-air flammable vapors, like gasoline, that may
accumulate near the floor.
QUESTION 4
Which type of container is typically used for permanent, above-ground residential
propane storage?
A) DOT cylinder
B) ASME tank
C) ISO container
D) Carboy
CORRECT ANSWER: B
EXPERT RATIONALE:
ASME tanks are designed for permanent installation and are built to the American
Society of Mechanical Engineers code. DOT cylinders, on the other hand, are designed
for transportation and are often used for temporary applications like forklifts or grills.
QUESTION 5
What is the purpose of an excess flow valve (EFV)?
A) To regulate system pressure
B) To stop the flow of gas if a downstream line ruptures
C) To allow for easy filling of the container
D) To vent excess pressure from the container
CORRECT ANSWER: B
, 4|Page
EXPERT RATIONALE:
An excess flow valve is a safety device that automatically closes when the flow rate
exceeds a predetermined limit. This rapid flow indicates a major leak or line break, and
closing prevents a large, uncontrolled release of gas.
QUESTION 6
What is the state agency that regulates the LP-Gas industry in South Carolina?
A) The South Carolina Department of Transportation
B) The South Carolina Public Service Commission
C) The South Carolina Liquefied Petroleum Gas Board
D) The South Carolina Department of Health and Environmental Control
CORRECT ANSWER: C
EXPERT RATIONALE:
The South Carolina Liquefied Petroleum Gas Board is the specific state body tasked with
overseeing and regulating LP-Gas dealers, installers, and operations. Their authority
comes from state statutes and they are responsible for licensing and enforcement.
QUESTION 7
During a pressure test of a new propane piping system, what is the minimum acceptable
test pressure?
A) 1.5 times the operating pressure
B) 3 times the operating pressure, but not less than 3 psig
C) 10 psig
D) 25 psig
CORRECT ANSWER: B
