CTR 156CT PROPANE FINAL EXAM
QUESTIONS AND ANSWERS WELL
ELABORATED LATEST UPDATED
2026
Question 1
If you see an "S" next to the date on a cylinder, that means the cylinder must
be requalified within how many years from that date?
Answer: 10 years
(Note: "S" indicates the cylinder was proof-pressure tested, extending the
requalification period to 10 years).
Question 2
What component controls the flow of propane through the piping system of a
dispenser?
Answer: Valves
Question 3
At room temperature and normal atmospheric pressure, what state is propane
in?
Answer: Gas
Question 4
You must ensure there are no ignition sources within how many feet of the
autogas filling area?
Answer: 25 feet
Question 5
When filling a cylinder by volume and a white mist begins to escape from the
fixed maximum liquid level gauge (bleeder valve), what action must you take
immediately?
Answer: Close the hose end valve
, The permanent marking "4BA240" tells you that the cylinder is made of
___________. -ANSWER ✔✔Alloy steel
A person can be inside a motorhome while the tank is being filled. -ANSWER
✔✔False
___________________ is added to propane to increase the likelihood that a leak
will be detected. -ANSWER ✔✔Odorant
Propane autogas dispensing systems typically use a ________ to fuel the vehicle. -
ANSWER ✔✔gasoline-style, low-emission nozzle
When filling a cylinder by volume, the cylinder will be full when ________. -
ANSWER ✔✔white mist begins to escape from the fixed maximum liquid level
gauge.
A customer walks up to your propane filling station to buy Autogas for his vehicle.
Can you sell him a 20lb cylinder to take back to the car to fill it where it ran out of
fuel? -ANSWER ✔✔No
Only use fire extinguishers to create an escape route — NOT to fight a propane
fire. -ANSWER ✔✔True
Cylinders may not be filled if they are past their ___________________ date. -
ANSWER ✔✔Re-qualification
QUESTIONS AND ANSWERS WELL
ELABORATED LATEST UPDATED
2026
Question 1
If you see an "S" next to the date on a cylinder, that means the cylinder must
be requalified within how many years from that date?
Answer: 10 years
(Note: "S" indicates the cylinder was proof-pressure tested, extending the
requalification period to 10 years).
Question 2
What component controls the flow of propane through the piping system of a
dispenser?
Answer: Valves
Question 3
At room temperature and normal atmospheric pressure, what state is propane
in?
Answer: Gas
Question 4
You must ensure there are no ignition sources within how many feet of the
autogas filling area?
Answer: 25 feet
Question 5
When filling a cylinder by volume and a white mist begins to escape from the
fixed maximum liquid level gauge (bleeder valve), what action must you take
immediately?
Answer: Close the hose end valve
, The permanent marking "4BA240" tells you that the cylinder is made of
___________. -ANSWER ✔✔Alloy steel
A person can be inside a motorhome while the tank is being filled. -ANSWER
✔✔False
___________________ is added to propane to increase the likelihood that a leak
will be detected. -ANSWER ✔✔Odorant
Propane autogas dispensing systems typically use a ________ to fuel the vehicle. -
ANSWER ✔✔gasoline-style, low-emission nozzle
When filling a cylinder by volume, the cylinder will be full when ________. -
ANSWER ✔✔white mist begins to escape from the fixed maximum liquid level
gauge.
A customer walks up to your propane filling station to buy Autogas for his vehicle.
Can you sell him a 20lb cylinder to take back to the car to fill it where it ran out of
fuel? -ANSWER ✔✔No
Only use fire extinguishers to create an escape route — NOT to fight a propane
fire. -ANSWER ✔✔True
Cylinders may not be filled if they are past their ___________________ date. -
ANSWER ✔✔Re-qualification
