LP GAS MASTER QUALIFER TESTED EXAM QUESTIONS
AND ANSWERS GRADED A+
✔✔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
✔✔ When must a dispensing unit have a License to operate in the state of Florida? -
✔✔When selling to the public
✔✔What are the insurance requirements for dispensing units in Florida? - ✔✔1 Mil
AND ANSWERS GRADED A+
✔✔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
✔✔ When must a dispensing unit have a License to operate in the state of Florida? -
✔✔When selling to the public
✔✔What are the insurance requirements for dispensing units in Florida? - ✔✔1 Mil
