LP GAS MASTER QUALIFIER EXAM
QUESTIONS AND ANSWERS
Name the 3 Specifications which propane containers are manufactured? - Answer-DOT,
ASME, FAA
What does DOT mean? - Answer-Department of Transportation
What does ASME mean? - Answer-American Society of Mechanical Engineers
How long after the manufacture may a DOT Aluminum or Steel cylinder be recertified? -
Answer-12 years, then every 5
How long after manufacture may an ASME container be used before recertification is
required? - Answer-Never
How long after manufacture may a DOT composite cylinder be used before
recertification? - Answer-Tested every 5 years, only good for 15 years, never recert.
Where is the identification information found on a DOT cylinder? - Answer-The collar
Where is the identification information found on a ASME ? - Answer-The data plate
Can a ASME container that does not have a data plate but appears to be in good
condition be filled? - Answer-NO
Can a licensed dispensing unit operation re-qualify DOT cylinders? - Answer-Yes
Name 3 types of requalification that can determine if a DOT is acceptable for safe
continued use? - Answer-Visual Inspection
Hydrostatics
Water Jacket
Cylinder markings 4BW-240 tells you what? - Answer-4BW = 12 years recert, how its
made
240 = working pressure in PSIG
How does a back flow check valve work? - Answer-Remains closed until outside
pressure opens to fill
What is the purpose of a pressure relief valve? - Answer-Opens when pressure
increases higher than allowed pressure
What information does a fixed liquid level gauge give you? - Answer-80% filled
, What does the excess flow in a liquid service valve do? - Answer-Permits the flow in
either direction but closes automatically when outward gas flow exceeds a safe rate
What should a vapor service valve be equipped with? - Answer-A cap or plug
What is an OPD? - Answer-Overfill prevention device
What is the purpose of an OPD? - Answer-Designed to cut off when fill level is achieved
Can you rely on a OPD for accurate filling of a DOT cylinder? - Answer-No, they are
only there to help
Is the float gauge alone a suitable method for filling? - Answer-No
What must be done before a new DOT container be filled? - Answer-Purged
Check Dates
Check tare
Before filling a motorhome what steps should you take? - Answer-Engine off
Brake on
Everyone out
What is the maximum amount of propane you may dispense into a container? - Answer-
80% of capacity
What must be done before any propane container can be refilled? - Answer-Visual
inspection
Personnel dispensing propane gas must have what? - Answer-The training to do so
Sources of ignition, including cigarettes, should be eliminated within how many feet of
the filling procedure? - Answer-25ft
How do you determine the gas capacity of a DOT cylinder? - Answer-WC in pounds
How do you determine the gas capacity of an ASME container? - Answer-WC in gallons
How do you determine if a DOT cylinder is overfilled? - Answer-The liquid level gauge -
when liquid comes out
How often is refresher training required? - Answer-Every 3 years
How do you determine the set scale weight when filling a DOT cylinder? - Answer-TW
on collar
Weight of nozzle
QUESTIONS AND ANSWERS
Name the 3 Specifications which propane containers are manufactured? - Answer-DOT,
ASME, FAA
What does DOT mean? - Answer-Department of Transportation
What does ASME mean? - Answer-American Society of Mechanical Engineers
How long after the manufacture may a DOT Aluminum or Steel cylinder be recertified? -
Answer-12 years, then every 5
How long after manufacture may an ASME container be used before recertification is
required? - Answer-Never
How long after manufacture may a DOT composite cylinder be used before
recertification? - Answer-Tested every 5 years, only good for 15 years, never recert.
Where is the identification information found on a DOT cylinder? - Answer-The collar
Where is the identification information found on a ASME ? - Answer-The data plate
Can a ASME container that does not have a data plate but appears to be in good
condition be filled? - Answer-NO
Can a licensed dispensing unit operation re-qualify DOT cylinders? - Answer-Yes
Name 3 types of requalification that can determine if a DOT is acceptable for safe
continued use? - Answer-Visual Inspection
Hydrostatics
Water Jacket
Cylinder markings 4BW-240 tells you what? - Answer-4BW = 12 years recert, how its
made
240 = working pressure in PSIG
How does a back flow check valve work? - Answer-Remains closed until outside
pressure opens to fill
What is the purpose of a pressure relief valve? - Answer-Opens when pressure
increases higher than allowed pressure
What information does a fixed liquid level gauge give you? - Answer-80% filled
, What does the excess flow in a liquid service valve do? - Answer-Permits the flow in
either direction but closes automatically when outward gas flow exceeds a safe rate
What should a vapor service valve be equipped with? - Answer-A cap or plug
What is an OPD? - Answer-Overfill prevention device
What is the purpose of an OPD? - Answer-Designed to cut off when fill level is achieved
Can you rely on a OPD for accurate filling of a DOT cylinder? - Answer-No, they are
only there to help
Is the float gauge alone a suitable method for filling? - Answer-No
What must be done before a new DOT container be filled? - Answer-Purged
Check Dates
Check tare
Before filling a motorhome what steps should you take? - Answer-Engine off
Brake on
Everyone out
What is the maximum amount of propane you may dispense into a container? - Answer-
80% of capacity
What must be done before any propane container can be refilled? - Answer-Visual
inspection
Personnel dispensing propane gas must have what? - Answer-The training to do so
Sources of ignition, including cigarettes, should be eliminated within how many feet of
the filling procedure? - Answer-25ft
How do you determine the gas capacity of a DOT cylinder? - Answer-WC in pounds
How do you determine the gas capacity of an ASME container? - Answer-WC in gallons
How do you determine if a DOT cylinder is overfilled? - Answer-The liquid level gauge -
when liquid comes out
How often is refresher training required? - Answer-Every 3 years
How do you determine the set scale weight when filling a DOT cylinder? - Answer-TW
on collar
Weight of nozzle
