LP Gas Master Qualifier – Gas Installation Exam Prep
2025–2026 | 200+ Verified Application Questions
with Correct Answers & Detailed Rationales |
Complete Certification Study Guide & Test Bank
1. What is the primary purpose of LP gas in residential applications?
o A) Cooling
o B) Electrical generation
o C) Heating and cooking.
o D) Water purification
Correct Answer: C
Rationale: LP gas is primarily used for heating and cooking in residential
settings.
2. Which of the following is a safety concern when installing LP gas systems?
o A) Noise pollution
o B) Gas leaks.
o C) Environmental impact
o D) Water quality
Correct Answer: B
Rationale: Gas leaks are a significant safety concern that can lead to
explosions or health hazards.
3. What is the minimum distance required between an LP gas tank and a
building, according to NFPA standards?
o A) 5 feet
o B) 10 feet.
o C) 20 feet
o D) 50 feet
Correct Answer: B
Rationale: NFPA standards specify a minimum distance to prevent fire
hazards.
4. What is the correct method for testing an LP gas line for leaks?
o A) Visual inspection only
, o B) Soap solution or electronic leak detector.
o C) Water submersion
o D) Pressure gauge only
Correct Answer: B
Rationale: A soap solution or electronic leak detector is used to identify
leaks effectively.
5. Which type of valve is typically used for LP gas shutoff?
o A) Ball valve
o B) Gate valve.
o C) Check valve
o D) Pressure relief valve
Correct Answer: B
Rationale: Gate valves are commonly used for shutoff in gas
installations.
6. What should be done if an LP gas tank is overfilled?
o A) Leave it as is
o B) Use the gas immediately
o C) Vent the excess gas safely.
o D) Move the tank indoors
Correct Answer: C
Rationale: Venting excess gas safely is crucial to prevent potential
hazards.
7. What is the primary component of LP gas?
o A) Methane
o B) Propane.
o C) Butane
o D) Ethanol
Correct Answer: B
Rationale: Propane is the primary component of LP gas, commonly used
for heating and cooking.
,8. What is the function of a pressure regulator in an LP gas system?
o A) To increase pressure
o B) To shut off gas flow
o C) To reduce pressure to a usable level.
o D) To measure gas flow
Correct Answer: C
Rationale: Pressure regulators are designed to ensure that gas is
delivered at a safe and usable pressure.
9. What is the correct installation procedure for LP gas appliances?
o A) Connect and turn on immediately
o B) Install without a manual
o C) Follow manufacturer’s instructions and local codes.
o D) Modify parts as necessary
Correct Answer: C
Rationale: Following the manufacturer's instructions and local codes
ensures safe and compliant installation.
10. What is required before an LP gas system can be put into service?
o A) A visual inspection only
o B) A pressure test for leaks.
o C) A financial assessment
o D) Environmental approval
Correct Answer: B
Rationale: A pressure test is essential to verify that the system is leak-
free before use.
11. What personal protective equipment (PPE) should be worn when handling LP
gas?
o A) No PPE is required
o B) Gloves and goggles.
o C) Only gloves
, o D) Only goggles
Correct Answer: B
Rationale: PPE is essential for safety when handling hazardous materials
like LP gas.
12. What is the proper way to store LP gas cylinders?
o A) Indoors, near heating sources
o B) Outdoors, in a shaded and well-ventilated area.
o C) In a closed garage
o D) On a wooden pallet
Correct Answer: B
Rationale: Proper outdoor storage prevents heat accumulation and
ensures ventilation.
13. Which code regulates the installation of LP gas systems?
o A) NEC
o B) NFPA 58.
o C) OSHA
o D) EPA
Correct Answer: B
Rationale: NFPA 58 outlines the safety standards for LP gas installations.
14. What is the main hazard associated with LP gas?
o A) Toxicity
o B) Flammability.
o C) Environmental impact
o D) Corrosiveness
Correct Answer: B
Rationale: LP gas is highly flammable, posing a significant fire hazard.
15. Which type of fittings is typically used for LP gas connections?
o A) PVC fittings
o B) Copper fittings only
2025–2026 | 200+ Verified Application Questions
with Correct Answers & Detailed Rationales |
Complete Certification Study Guide & Test Bank
1. What is the primary purpose of LP gas in residential applications?
o A) Cooling
o B) Electrical generation
o C) Heating and cooking.
o D) Water purification
Correct Answer: C
Rationale: LP gas is primarily used for heating and cooking in residential
settings.
2. Which of the following is a safety concern when installing LP gas systems?
o A) Noise pollution
o B) Gas leaks.
o C) Environmental impact
o D) Water quality
Correct Answer: B
Rationale: Gas leaks are a significant safety concern that can lead to
explosions or health hazards.
3. What is the minimum distance required between an LP gas tank and a
building, according to NFPA standards?
o A) 5 feet
o B) 10 feet.
o C) 20 feet
o D) 50 feet
Correct Answer: B
Rationale: NFPA standards specify a minimum distance to prevent fire
hazards.
4. What is the correct method for testing an LP gas line for leaks?
o A) Visual inspection only
, o B) Soap solution or electronic leak detector.
o C) Water submersion
o D) Pressure gauge only
Correct Answer: B
Rationale: A soap solution or electronic leak detector is used to identify
leaks effectively.
5. Which type of valve is typically used for LP gas shutoff?
o A) Ball valve
o B) Gate valve.
o C) Check valve
o D) Pressure relief valve
Correct Answer: B
Rationale: Gate valves are commonly used for shutoff in gas
installations.
6. What should be done if an LP gas tank is overfilled?
o A) Leave it as is
o B) Use the gas immediately
o C) Vent the excess gas safely.
o D) Move the tank indoors
Correct Answer: C
Rationale: Venting excess gas safely is crucial to prevent potential
hazards.
7. What is the primary component of LP gas?
o A) Methane
o B) Propane.
o C) Butane
o D) Ethanol
Correct Answer: B
Rationale: Propane is the primary component of LP gas, commonly used
for heating and cooking.
,8. What is the function of a pressure regulator in an LP gas system?
o A) To increase pressure
o B) To shut off gas flow
o C) To reduce pressure to a usable level.
o D) To measure gas flow
Correct Answer: C
Rationale: Pressure regulators are designed to ensure that gas is
delivered at a safe and usable pressure.
9. What is the correct installation procedure for LP gas appliances?
o A) Connect and turn on immediately
o B) Install without a manual
o C) Follow manufacturer’s instructions and local codes.
o D) Modify parts as necessary
Correct Answer: C
Rationale: Following the manufacturer's instructions and local codes
ensures safe and compliant installation.
10. What is required before an LP gas system can be put into service?
o A) A visual inspection only
o B) A pressure test for leaks.
o C) A financial assessment
o D) Environmental approval
Correct Answer: B
Rationale: A pressure test is essential to verify that the system is leak-
free before use.
11. What personal protective equipment (PPE) should be worn when handling LP
gas?
o A) No PPE is required
o B) Gloves and goggles.
o C) Only gloves
, o D) Only goggles
Correct Answer: B
Rationale: PPE is essential for safety when handling hazardous materials
like LP gas.
12. What is the proper way to store LP gas cylinders?
o A) Indoors, near heating sources
o B) Outdoors, in a shaded and well-ventilated area.
o C) In a closed garage
o D) On a wooden pallet
Correct Answer: B
Rationale: Proper outdoor storage prevents heat accumulation and
ensures ventilation.
13. Which code regulates the installation of LP gas systems?
o A) NEC
o B) NFPA 58.
o C) OSHA
o D) EPA
Correct Answer: B
Rationale: NFPA 58 outlines the safety standards for LP gas installations.
14. What is the main hazard associated with LP gas?
o A) Toxicity
o B) Flammability.
o C) Environmental impact
o D) Corrosiveness
Correct Answer: B
Rationale: LP gas is highly flammable, posing a significant fire hazard.
15. Which type of fittings is typically used for LP gas connections?
o A) PVC fittings
o B) Copper fittings only
