PROPANE PRACTICE TESTS EXAM
WITH 100% CORRECT ANSWERS 2024
SECTION 1: GENERAL SAFETY & PROPERTY (Questions 1–10)
cx cx cx cx cx cx cx
1. Which odorant is added to propane to give it a distinct smell?
cx cx cx cx cx cx cx cx cx cx cx cx
A) Methanethiol (mercaptan)
cx cx
B) Chlorine
cx
C) Ammonia
cx
D) Sulfur dioxide
cx cx
Correct Answer: A cx cx
2. The Lower Flammable Limit (LFL) of propane in air is approximately:
cx cx cx cx cx cx cx cx cx cx cx
A) 1.5%
cx
B) 2.1%
cx
C) 5.3%
cx
D) 9.5%
cx
Correct Answer: B cx cx
3. In the event of a propane leak inside a building, the first action should be:
cx cx cx cx cx cx cx cx cx cx cx cx cx cx cx
A) Open all windows and doors
cx cx cx cx cx
B) Evacuate everyone and call 911/fire department from a safe distance
cx cx cx cx cx cx cx cx cx cx
C) Turn off the main gas supply at the tank
cx cx cx cx cx cx cx cx cx
D) Use a match to find the leak
cx cx cx cx cx cx cx
Correct Answer: B cx cx
4. Propane vapor is heavier than air. Where will it accumulate?
cx cx cx cx cx cx cx cx cx cx
A) Near the ceiling
cx cx cx
B) At the highest point of the room
cx cx cx cx cx cx cx
C) At floor level or in low areas
cx cx cx cx cx cx cx
D) Evenly throughout the space
cx cx cx cx
Correct Answer: C cx cx
5. Which NFPA standard is the primary reference for the storage and handling of liquefied petroleum
cx cx cx cx cx cx cx cx cx cx cx cx cx cx cx cx
gases?
,A) NFPA 54
cx cx
B) NFPA 58
cx cx
C) NFPA 70 (NEC)
cx cx cx
D) NFPA 72
cx cx
Correct Answer: B cx cx
6. When working on a propane system, personal protective equipment (PPE) should include at minim
cx cx cx cx cx cx cx cx cx cx cx cx cx cx
um:
A) Safety glasses and steel-toe boots
cx cx cx cx cx
B) Flame-resistant clothing and gloves
cx cx cx cx
C) Hearing protection
cx cx
D) All of the above
cx cx cx cx
Correct Answer: D cx cx
7. A Class B fire (flammable liquids/gases) on a propane system should be extinguished with:
cx cx cx cx cx cx cx cx cx cx cx cx cx cx
A) Water spray
cx cx
B) Dry chemical (e.g., Purple K) or CO₂
cx cx cx cx cx cx cx
C) Foam only
cx cx
D) Sand only
cx cx
Correct Answer: B cx cx
8. The maximum allowable filling capacity of a propane cylinder (by liquid volume) is:
cx cx cx cx cx cx cx cx cx cx cx cx cx
A) 80%
cx
B) 85%
cx
C) 90%
cx
D) 95%
cx
Correct Answer: A (80% is the legal limit to allow expansion)
cx cx cx cx cx cx cx cx cx cx
9. What color is a properly painted residential propane tank (above-ground)?
cx cx cx cx cx cx cx cx cx cx
A) Red
cx
B) Yellow
cx
C) White or light-reflective colors (silver/beige)
cx cx cx cx cx
D) Black
cx
Correct Answer: C cx cx
,10. If you smell propane while entering a building, you should:
cx cx cx cx cx cx cx cx cx cx
A) Turn on a light switch to see
cx cx cx cx cx cx cx
B) Use your cell phone inside the building
cx cx cx cx cx cx cx
C) Leave immediately and do not operate any electrical devices
cx cx cx cx cx cx cx cx cx
D) Open the furnace to ventilate
cx cx cx cx cx
Correct Answer: C cx cx
SECTION 2: REGULATORS & PRESSURE CONTROL (Questions 11–18)
cx cx cx cx cx cx cx
11. A typical residential propane first-
cx cx cx cx cx
stage regulator reduces tank pressure from approximately 200 psi to:
cx cx cx cx cx cx cx cx cx
A) 0.5 psi
cx cx
B) 5–10 psi
cx cx
C) 50–60 psi
cx cx
D) 100 psi
cx cx
Correct Answer: B (Typical first-stage outlet: 10 psi)
cx cx cx cx cx cx cx
12. The purpose of a second-stage regulator is to:
cx cx cx cx cx cx cx cx
A) Increase gas pressure for appliances
cx cx cx cx cx
B) Reduce pressure to 11 inches of water column (WC)
cx cx cx cx cx cx cx cx cx
C) Measure gas flow
cx cx cx
D) Shut off gas in an emergency
cx cx cx cx cx cx
Correct Answer: B cx cx
13. A "vent limiter" on a regulator is designed to:
cx cx cx cx cx cx cx cx cx
A) Increase flow during high demand
cx cx cx cx cx
B) Automatically close if the vent is blocked
cx cx cx cx cx cx cx
C) Limit the amount of gas released if the diaphragm fails
cx cx cx cx cx cx cx cx cx cx
D) Reduce noise
cx cx
Correct Answer: C cx cx
14. What is the standard manifold pressure for most natural gas appliances converted to propane?
cx cx cx cx cx cx cx cx cx cx cx cx cx cx
A) 3.5" WC
cx cx
B) 7" WC
cx cx
C) 11" WC
cx cx
D) 14" WC
cx cx
Correct Answer: C (11" WC is standard for propane)
cx cx cx cx cx cx cx cx
, 15. Regulator freeze-up is usually caused by:
cx cx cx cx cx cx
A) Water in the gas stream
cx cx cx cx cx
B) Over-pressurization
cx
C) Excessive ambient heat
cx cx cx
D) Improper mounting angle
cx cx cx
Correct Answer: A cx cx
16. An integral two-stage regulator is typically used on:
cx cx cx cx cx cx cx cx
A) Large industrial tanks
cx cx cx
B) Cylinders (e.g., BBQ tanks)
cx cx cx cx
C) Underground storage
cx cx
D) Main distribution lines
cx cx cx
Correct Answer: B cx cx
17. The maximum allowable pressure drop across a regulator during full load is generally:
cx cx cx cx cx cx cx cx cx cx cx cx cx
A) 1" WC
cx cx
B) 2" WC
cx cx
C) 5" WC
cx cx
D) No drop is allowed
cx cx cx cx
Correct Answer: A (NFPA 58 allows 1" WC max drop)
cx cx cx cx cx cx cx cx cx
18. Which test is used to check regulator lock-up pressure?
cx cx cx cx cx cx cx cx cx
A) Leak test
cx cx
B) Pressure decay test
cx cx cx
C) Static pressure test with no flow
cx cx cx cx cx cx
D) Flow capacity test
cx cx cx
Correct Answer: C cx cx
SECTION 3: PIPE SIZING & INSTALLATION (Questions 19–28)
cx cx cx cx cx cx cx
19. In a propane piping system, the total equivalent length (TEL) includes:
cx cx cx cx cx cx cx cx cx cx cx
A) Only straight pipe
cx cx cx
B) Straight pipe plus fittings and valves
cx cx cx cx cx cx
C) Only the longest run
cx cx cx cx
D) Vertical runs only
cx cx cx
Correct Answer: B cx cx
WITH 100% CORRECT ANSWERS 2024
SECTION 1: GENERAL SAFETY & PROPERTY (Questions 1–10)
cx cx cx cx cx cx cx
1. Which odorant is added to propane to give it a distinct smell?
cx cx cx cx cx cx cx cx cx cx cx cx
A) Methanethiol (mercaptan)
cx cx
B) Chlorine
cx
C) Ammonia
cx
D) Sulfur dioxide
cx cx
Correct Answer: A cx cx
2. The Lower Flammable Limit (LFL) of propane in air is approximately:
cx cx cx cx cx cx cx cx cx cx cx
A) 1.5%
cx
B) 2.1%
cx
C) 5.3%
cx
D) 9.5%
cx
Correct Answer: B cx cx
3. In the event of a propane leak inside a building, the first action should be:
cx cx cx cx cx cx cx cx cx cx cx cx cx cx cx
A) Open all windows and doors
cx cx cx cx cx
B) Evacuate everyone and call 911/fire department from a safe distance
cx cx cx cx cx cx cx cx cx cx
C) Turn off the main gas supply at the tank
cx cx cx cx cx cx cx cx cx
D) Use a match to find the leak
cx cx cx cx cx cx cx
Correct Answer: B cx cx
4. Propane vapor is heavier than air. Where will it accumulate?
cx cx cx cx cx cx cx cx cx cx
A) Near the ceiling
cx cx cx
B) At the highest point of the room
cx cx cx cx cx cx cx
C) At floor level or in low areas
cx cx cx cx cx cx cx
D) Evenly throughout the space
cx cx cx cx
Correct Answer: C cx cx
5. Which NFPA standard is the primary reference for the storage and handling of liquefied petroleum
cx cx cx cx cx cx cx cx cx cx cx cx cx cx cx cx
gases?
,A) NFPA 54
cx cx
B) NFPA 58
cx cx
C) NFPA 70 (NEC)
cx cx cx
D) NFPA 72
cx cx
Correct Answer: B cx cx
6. When working on a propane system, personal protective equipment (PPE) should include at minim
cx cx cx cx cx cx cx cx cx cx cx cx cx cx
um:
A) Safety glasses and steel-toe boots
cx cx cx cx cx
B) Flame-resistant clothing and gloves
cx cx cx cx
C) Hearing protection
cx cx
D) All of the above
cx cx cx cx
Correct Answer: D cx cx
7. A Class B fire (flammable liquids/gases) on a propane system should be extinguished with:
cx cx cx cx cx cx cx cx cx cx cx cx cx cx
A) Water spray
cx cx
B) Dry chemical (e.g., Purple K) or CO₂
cx cx cx cx cx cx cx
C) Foam only
cx cx
D) Sand only
cx cx
Correct Answer: B cx cx
8. The maximum allowable filling capacity of a propane cylinder (by liquid volume) is:
cx cx cx cx cx cx cx cx cx cx cx cx cx
A) 80%
cx
B) 85%
cx
C) 90%
cx
D) 95%
cx
Correct Answer: A (80% is the legal limit to allow expansion)
cx cx cx cx cx cx cx cx cx cx
9. What color is a properly painted residential propane tank (above-ground)?
cx cx cx cx cx cx cx cx cx cx
A) Red
cx
B) Yellow
cx
C) White or light-reflective colors (silver/beige)
cx cx cx cx cx
D) Black
cx
Correct Answer: C cx cx
,10. If you smell propane while entering a building, you should:
cx cx cx cx cx cx cx cx cx cx
A) Turn on a light switch to see
cx cx cx cx cx cx cx
B) Use your cell phone inside the building
cx cx cx cx cx cx cx
C) Leave immediately and do not operate any electrical devices
cx cx cx cx cx cx cx cx cx
D) Open the furnace to ventilate
cx cx cx cx cx
Correct Answer: C cx cx
SECTION 2: REGULATORS & PRESSURE CONTROL (Questions 11–18)
cx cx cx cx cx cx cx
11. A typical residential propane first-
cx cx cx cx cx
stage regulator reduces tank pressure from approximately 200 psi to:
cx cx cx cx cx cx cx cx cx
A) 0.5 psi
cx cx
B) 5–10 psi
cx cx
C) 50–60 psi
cx cx
D) 100 psi
cx cx
Correct Answer: B (Typical first-stage outlet: 10 psi)
cx cx cx cx cx cx cx
12. The purpose of a second-stage regulator is to:
cx cx cx cx cx cx cx cx
A) Increase gas pressure for appliances
cx cx cx cx cx
B) Reduce pressure to 11 inches of water column (WC)
cx cx cx cx cx cx cx cx cx
C) Measure gas flow
cx cx cx
D) Shut off gas in an emergency
cx cx cx cx cx cx
Correct Answer: B cx cx
13. A "vent limiter" on a regulator is designed to:
cx cx cx cx cx cx cx cx cx
A) Increase flow during high demand
cx cx cx cx cx
B) Automatically close if the vent is blocked
cx cx cx cx cx cx cx
C) Limit the amount of gas released if the diaphragm fails
cx cx cx cx cx cx cx cx cx cx
D) Reduce noise
cx cx
Correct Answer: C cx cx
14. What is the standard manifold pressure for most natural gas appliances converted to propane?
cx cx cx cx cx cx cx cx cx cx cx cx cx cx
A) 3.5" WC
cx cx
B) 7" WC
cx cx
C) 11" WC
cx cx
D) 14" WC
cx cx
Correct Answer: C (11" WC is standard for propane)
cx cx cx cx cx cx cx cx
, 15. Regulator freeze-up is usually caused by:
cx cx cx cx cx cx
A) Water in the gas stream
cx cx cx cx cx
B) Over-pressurization
cx
C) Excessive ambient heat
cx cx cx
D) Improper mounting angle
cx cx cx
Correct Answer: A cx cx
16. An integral two-stage regulator is typically used on:
cx cx cx cx cx cx cx cx
A) Large industrial tanks
cx cx cx
B) Cylinders (e.g., BBQ tanks)
cx cx cx cx
C) Underground storage
cx cx
D) Main distribution lines
cx cx cx
Correct Answer: B cx cx
17. The maximum allowable pressure drop across a regulator during full load is generally:
cx cx cx cx cx cx cx cx cx cx cx cx cx
A) 1" WC
cx cx
B) 2" WC
cx cx
C) 5" WC
cx cx
D) No drop is allowed
cx cx cx cx
Correct Answer: A (NFPA 58 allows 1" WC max drop)
cx cx cx cx cx cx cx cx cx
18. Which test is used to check regulator lock-up pressure?
cx cx cx cx cx cx cx cx cx
A) Leak test
cx cx
B) Pressure decay test
cx cx cx
C) Static pressure test with no flow
cx cx cx cx cx cx
D) Flow capacity test
cx cx cx
Correct Answer: C cx cx
SECTION 3: PIPE SIZING & INSTALLATION (Questions 19–28)
cx cx cx cx cx cx cx
19. In a propane piping system, the total equivalent length (TEL) includes:
cx cx cx cx cx cx cx cx cx cx cx
A) Only straight pipe
cx cx cx
B) Straight pipe plus fittings and valves
cx cx cx cx cx cx
C) Only the longest run
cx cx cx cx
D) Vertical runs only
cx cx cx
Correct Answer: B cx cx
