GAS )MASTER QUALIFIER EXAM WITH
CORRECT ACTUAL QUESTIONS AND
CORRECTLY WELL DEFINED ANSWERS
LATEST ALREADY GRADED A+
FLORIDA LP GAS MASTER QUALIFIER EXAM (PRACTICE)
QUESTIONS 1–25 (WITH ANSWERS + EXPLANATIONS)
1. What is the primary composition of Liquefied Petroleum
Gas (LPG)?
A. Oxygen and nitrogen
B. Propane and butane
C. Methane and ethane
D. Carbon monoxide and hydrogen
✔ Answer: B. Propane and butane
Explanation:
,LPG is primarily made up of propane (C₃H₈) and butane
(C₄H₁₀). These hydrocarbons are stored under pressure in
liquid form and vaporize when released for use.
2. LPG is considered what type of fuel?
A. Solid fuel
B. Renewable fuel
C. Fossil fuel
D. Nuclear fuel
✔ Answer: C. Fossil fuel
Explanation:
LPG is derived from natural gas processing and petroleum
refining, making it a fossil fuel.
3. What is the odorant added to LPG for leak detection?
A. Chlorine
B. Mercaptan
,C. Ammonia
D. Oxygen
✔ Answer: B. Mercaptan
Explanation:
LPG is naturally odorless. Ethyl mercaptan is added to give it
a strong “rotten egg” smell to help detect leaks.
4. What is the boiling point of propane at atmospheric
pressure?
A. -42°C
B. 0°C
C. 100°C
D. -10°C
✔ Answer: A. -42°C
Explanation:
, Propane boils at -42°C, meaning it easily vaporizes at normal
temperatures.
5. LPG vapor is what compared to air?
A. Lighter than air
B. Same weight as air
C. Heavier than air
D. Invisible and weightless
✔ Answer: C. Heavier than air
Explanation:
LPG vapor is heavier than air, so it settles in low areas like
basements or trenches, increasing fire risk.
6. What is the primary hazard of LPG leaks?
A. Radiation
B. Explosion and fire
C. Freezing injury only