Propane Fill Certification UPDATED
ACTUAL Exam Questions and CORRECT
Answers
Characteristics of Propane - CORRECT ANSWER - is a colorless and odorless gas. Since
propane is odorless, it is intentionally odorized so leaks can be detected. The odor is similar to
rotten eggs.
What affect ambient temperatures have on the expansion of propane - CORRECT
ANSWER - Propane volume rises as temperature rises and falls as temperature falls. Being
temperature dependent, propane becomes more dense as temperature falls and expands as
temperature increases.
The formula used to set the scale of proper filling - CORRECT ANSWER - W.C. (water
capacity) x .42 + T.W. (tare weight)
What affect anhydrous ammonia has on brass - CORRECT ANSWER - NH3 is corrosive
to brass, copper and galvanized components/fittings. When these components/fittings come in
contact with NH3 liquid or vapor, the metal will corrode and will fail.
The propane procedures for filling an rv - CORRECT ANSWER - Set the propane meter to
zero.
Connect the motor fuel hose to the tank fill valve.
Open the vent value on the fixed maximum liquid level gauge.
Start the pump and slowly open the hose and valve.
When a steady white mist is emitted, close the hose and valve.
Close the fixed maximum liquid level gauge.
Shut off the pump.
Slowly loosen the filler adapter to prevent any loose propane. Wait until propane stops venting.
Disconnect and stow the hose assembly once venting has stopped.
Replace the filler valve cap.
ACTUAL Exam Questions and CORRECT
Answers
Characteristics of Propane - CORRECT ANSWER - is a colorless and odorless gas. Since
propane is odorless, it is intentionally odorized so leaks can be detected. The odor is similar to
rotten eggs.
What affect ambient temperatures have on the expansion of propane - CORRECT
ANSWER - Propane volume rises as temperature rises and falls as temperature falls. Being
temperature dependent, propane becomes more dense as temperature falls and expands as
temperature increases.
The formula used to set the scale of proper filling - CORRECT ANSWER - W.C. (water
capacity) x .42 + T.W. (tare weight)
What affect anhydrous ammonia has on brass - CORRECT ANSWER - NH3 is corrosive
to brass, copper and galvanized components/fittings. When these components/fittings come in
contact with NH3 liquid or vapor, the metal will corrode and will fail.
The propane procedures for filling an rv - CORRECT ANSWER - Set the propane meter to
zero.
Connect the motor fuel hose to the tank fill valve.
Open the vent value on the fixed maximum liquid level gauge.
Start the pump and slowly open the hose and valve.
When a steady white mist is emitted, close the hose and valve.
Close the fixed maximum liquid level gauge.
Shut off the pump.
Slowly loosen the filler adapter to prevent any loose propane. Wait until propane stops venting.
Disconnect and stow the hose assembly once venting has stopped.
Replace the filler valve cap.
