LP GAS MASTER QUALIFER STUDY EXAM GUIDE
QUESTIONS AND ANSWERS GRADED A+
✔✔When the outside temperature increases, what happens to propane inside a
container? - ✔✔Expands
✔✔Name three types of specification which propane containers are manufactures
under. - ✔✔DOT
ASME
FAA
✔✔What does ASME and DOT mean? - ✔✔American Society of Mechanical Engineers
Department of Transportation
✔✔How long after manufacture may a DOT steel or Aluminum cylinders be recertified?
- ✔✔10 years (12 years)
✔✔How long after manufacture may an AMME propane container be used before it
needs to be recertified? - ✔✔Never
✔✔How long after manufacture, may a DOT cylinder be used before recertification? -
✔✔Tested every 5 years
Only good for 15 years
No recert ever
✔✔Where is the identifications information found on a DOT cylinder and an ASME? -
✔✔DOT: Collar
Data plate
✔✔If an ASME container does not have a Data Plate, but appears in good condition,
can it be filled? - ✔✔No
✔✔Can a Licensed dispensing unit operator re-qualify DOT cylinders for continued
use? - ✔✔Yes, Visual (E)
✔✔Name three types of re-qualification that can determine if a DOT cyclinder is
acceptable for safe continued use - ✔✔Visual
Hydrostatics
Water Jacket
✔✔The cylinder marking 4BW-240 - ✔✔4BW= 12 years recert
240= PSIG (pounds per square inch)
, ✔✔How does a back flow check valve work? - ✔✔Remains closed until outside
pressure open to fil
✔✔What is the purpose of a relief valve? - ✔✔Opens when the pressure increases
higher than the allowed pressure.
✔✔What information does a fixed liquid level gauge give you? - ✔✔Communicate he
vapor space of the container
80% fill
✔✔What does the excess flow in a liquid service valve do? - ✔✔Permits the flow in
either direction but closes automatically when the outward gas flow exceeds a safe rate
✔✔What should a vapor service valve (POL) be equipped with when disconnected? -
✔✔A cap or plugged
✔✔What is an OPD and what is its purpose? - ✔✔Over - Representation - Devise
Designed to cut off when fill level is achieved
✔✔Can you rely on an OPD valve for accurate filling of a DOT cylinder? - ✔✔No, they
are there to help
✔✔Is the float gauge alone a suitable method for filling? - ✔✔No
✔✔What must be done before a new DOT container can be filled? - ✔✔Purged
Check dates
Check Tare
✔✔Before filling a motor home or RV, what steps should be taken? - ✔✔Turned off
Set breaks
No one or pets in RV
All appliances turned off
Electric - off
Vehicle must be choked.
✔✔What is the maximum amount of propane you may dispense into a container? -
✔✔80%
✔✔What must be done before any propane container can be refilled? - ✔✔Inspected
✔✔Personnel dispensing of propane gas must have? - ✔✔Ethel-mercaptan
QUESTIONS AND ANSWERS GRADED A+
✔✔When the outside temperature increases, what happens to propane inside a
container? - ✔✔Expands
✔✔Name three types of specification which propane containers are manufactures
under. - ✔✔DOT
ASME
FAA
✔✔What does ASME and DOT mean? - ✔✔American Society of Mechanical Engineers
Department of Transportation
✔✔How long after manufacture may a DOT steel or Aluminum cylinders be recertified?
- ✔✔10 years (12 years)
✔✔How long after manufacture may an AMME propane container be used before it
needs to be recertified? - ✔✔Never
✔✔How long after manufacture, may a DOT cylinder be used before recertification? -
✔✔Tested every 5 years
Only good for 15 years
No recert ever
✔✔Where is the identifications information found on a DOT cylinder and an ASME? -
✔✔DOT: Collar
Data plate
✔✔If an ASME container does not have a Data Plate, but appears in good condition,
can it be filled? - ✔✔No
✔✔Can a Licensed dispensing unit operator re-qualify DOT cylinders for continued
use? - ✔✔Yes, Visual (E)
✔✔Name three types of re-qualification that can determine if a DOT cyclinder is
acceptable for safe continued use - ✔✔Visual
Hydrostatics
Water Jacket
✔✔The cylinder marking 4BW-240 - ✔✔4BW= 12 years recert
240= PSIG (pounds per square inch)
, ✔✔How does a back flow check valve work? - ✔✔Remains closed until outside
pressure open to fil
✔✔What is the purpose of a relief valve? - ✔✔Opens when the pressure increases
higher than the allowed pressure.
✔✔What information does a fixed liquid level gauge give you? - ✔✔Communicate he
vapor space of the container
80% fill
✔✔What does the excess flow in a liquid service valve do? - ✔✔Permits the flow in
either direction but closes automatically when the outward gas flow exceeds a safe rate
✔✔What should a vapor service valve (POL) be equipped with when disconnected? -
✔✔A cap or plugged
✔✔What is an OPD and what is its purpose? - ✔✔Over - Representation - Devise
Designed to cut off when fill level is achieved
✔✔Can you rely on an OPD valve for accurate filling of a DOT cylinder? - ✔✔No, they
are there to help
✔✔Is the float gauge alone a suitable method for filling? - ✔✔No
✔✔What must be done before a new DOT container can be filled? - ✔✔Purged
Check dates
Check Tare
✔✔Before filling a motor home or RV, what steps should be taken? - ✔✔Turned off
Set breaks
No one or pets in RV
All appliances turned off
Electric - off
Vehicle must be choked.
✔✔What is the maximum amount of propane you may dispense into a container? -
✔✔80%
✔✔What must be done before any propane container can be refilled? - ✔✔Inspected
✔✔Personnel dispensing of propane gas must have? - ✔✔Ethel-mercaptan
