RV TECHNICIAN: PROPANE
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS 100%
CORRECT ||UPDATED 2026
Question 1
The lockup pressure test verifies the pressure at which...
Answer: The regulator locks up when no propane is flowing.
Question 2
What action should be taken immediately after conducting the operating
pressure test?
Answer: Close the gas cock (test valve/appliance shutoff valve).
Question 3
Any regulator lockup pressure over how many inches Water Column (in.
WC) will require the regulator to be replaced?
Answer: 14 inches WC
Explanation: Standard low-pressure propane appliances operate at 11 in.
WC. Lockup pressure usually ranges from 12 to 13 in. WC, but exceeding
14 in. WC indicates a worn or damaged regulator diaphragm/seat that fails
to shut off flow properly.
Question 4
During a timed pressure drop test, no pressure drop should be detected. If
there is a pressure increase due to thermal expansion, ________; and if there
is a pressure drop, ________.
Answer: Repeat the test | Locate and repair the leak, and retest.
Question 5
What specific measurement unit should be documented when recording a
timed pressure drop test with a test apparatus?
Answer: Inches of water (or in. WC / Inches Water Column).
QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS 100%
CORRECT ||UPDATED 2026
Question 1
The lockup pressure test verifies the pressure at which...
Answer: The regulator locks up when no propane is flowing.
Question 2
What action should be taken immediately after conducting the operating
pressure test?
Answer: Close the gas cock (test valve/appliance shutoff valve).
Question 3
Any regulator lockup pressure over how many inches Water Column (in.
WC) will require the regulator to be replaced?
Answer: 14 inches WC
Explanation: Standard low-pressure propane appliances operate at 11 in.
WC. Lockup pressure usually ranges from 12 to 13 in. WC, but exceeding
14 in. WC indicates a worn or damaged regulator diaphragm/seat that fails
to shut off flow properly.
Question 4
During a timed pressure drop test, no pressure drop should be detected. If
there is a pressure increase due to thermal expansion, ________; and if there
is a pressure drop, ________.
Answer: Repeat the test | Locate and repair the leak, and retest.
Question 5
What specific measurement unit should be documented when recording a
timed pressure drop test with a test apparatus?
Answer: Inches of water (or in. WC / Inches Water Column).
