LP GAS MASTER QUALIFER FINAL EXAM QUESTIONS
AND ANSWERS GRADED A+
✔✔Where is the identification information found on a DOT cylinder? - ✔✔The collar
✔✔Where is the identification information found on a ASME ? - ✔✔The data plate
✔✔Can a ASME container that does not have a data plate but appears to be in good
condition be filled? - ✔✔NO
✔✔Can a licensed dispensing unit operation re-qualify DOT cylinders? - ✔✔Yes
✔✔Name 3 types of requalification that can determine if a DOT is acceptable for safe
continued use? - ✔✔Visual Inspection
Hydrostatics
Water Jacket
✔✔Cylinder markings 4BW-240 tells you what? - ✔✔4BW = 12 years recert, how its
made
240 = working pressure in PSIG
✔✔How does a back flow check valve work? - ✔✔Remains closed until outside
pressure opens to fill
✔✔What is the purpose of a pressure relief valve? - ✔✔Opens when pressure
increases higher than allowed pressure
✔✔What information does a fixed liquid level gauge give you? - ✔✔80% filled
✔✔What does the excess flow in a liquid service valve do? - ✔✔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? - ✔✔A cap or plug
✔✔What is an OPD? - ✔✔Overfill prevention device
✔✔What is the purpose of an OPD? - ✔✔Designed to cut off when fill level is achieved
✔✔Can you rely on a OPD for accurate filling of a DOT cylinder? - ✔✔No, they are only
there to help
✔✔Is the float gauge alone a suitable method for filling? - ✔✔No
✔✔What must be done before a new DOT container be filled? - ✔✔Purged
, Check Dates
Check tare
✔✔Before filling a motorhome what steps should you take? - ✔✔Engine off
Brake on
Everyone out
✔✔What is the maximum amount of propane you may dispense into a container? -
✔✔80% of capacity
✔✔What must be done before any propane container can be refilled? - ✔✔Visual
inspection
✔✔Personnel dispensing propane gas must have what? - ✔✔The training to do so
✔✔Sources of ignition, including cigarettes, should be eliminated within how many feet
of the filling procedure? - ✔✔25ft
✔✔How do you determine the gas capacity of a DOT cylinder? - ✔✔WC in pounds
✔✔How do you determine the gas capacity of an ASME container? - ✔✔WC in gallons
✔✔How do you determine if a DOT cylinder is overfilled? - ✔✔The liquid level gauge -
when liquid comes out
✔✔How often is refresher training required? - ✔✔Every 3 years
✔✔How do you determine the set scale weight when filling a DOT cylinder? - ✔✔TW on
collar
Weight of nozzle
LP capacity
✔✔What is the largest amount of LP that can be transported in an enclosed vehicle? -
✔✔90 lbs
✔✔What is the largest size propane container that can be transported in an enclosed
vehicle? - ✔✔45lbs
✔✔In what position should a container be transported? - ✔✔Pressure relief in the
intended use position
✔✔How many feet around the dispensing unit must be kept free of debris and other
combustible materials? - ✔✔10 ft
AND ANSWERS GRADED A+
✔✔Where is the identification information found on a DOT cylinder? - ✔✔The collar
✔✔Where is the identification information found on a ASME ? - ✔✔The data plate
✔✔Can a ASME container that does not have a data plate but appears to be in good
condition be filled? - ✔✔NO
✔✔Can a licensed dispensing unit operation re-qualify DOT cylinders? - ✔✔Yes
✔✔Name 3 types of requalification that can determine if a DOT is acceptable for safe
continued use? - ✔✔Visual Inspection
Hydrostatics
Water Jacket
✔✔Cylinder markings 4BW-240 tells you what? - ✔✔4BW = 12 years recert, how its
made
240 = working pressure in PSIG
✔✔How does a back flow check valve work? - ✔✔Remains closed until outside
pressure opens to fill
✔✔What is the purpose of a pressure relief valve? - ✔✔Opens when pressure
increases higher than allowed pressure
✔✔What information does a fixed liquid level gauge give you? - ✔✔80% filled
✔✔What does the excess flow in a liquid service valve do? - ✔✔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? - ✔✔A cap or plug
✔✔What is an OPD? - ✔✔Overfill prevention device
✔✔What is the purpose of an OPD? - ✔✔Designed to cut off when fill level is achieved
✔✔Can you rely on a OPD for accurate filling of a DOT cylinder? - ✔✔No, they are only
there to help
✔✔Is the float gauge alone a suitable method for filling? - ✔✔No
✔✔What must be done before a new DOT container be filled? - ✔✔Purged
, Check Dates
Check tare
✔✔Before filling a motorhome what steps should you take? - ✔✔Engine off
Brake on
Everyone out
✔✔What is the maximum amount of propane you may dispense into a container? -
✔✔80% of capacity
✔✔What must be done before any propane container can be refilled? - ✔✔Visual
inspection
✔✔Personnel dispensing propane gas must have what? - ✔✔The training to do so
✔✔Sources of ignition, including cigarettes, should be eliminated within how many feet
of the filling procedure? - ✔✔25ft
✔✔How do you determine the gas capacity of a DOT cylinder? - ✔✔WC in pounds
✔✔How do you determine the gas capacity of an ASME container? - ✔✔WC in gallons
✔✔How do you determine if a DOT cylinder is overfilled? - ✔✔The liquid level gauge -
when liquid comes out
✔✔How often is refresher training required? - ✔✔Every 3 years
✔✔How do you determine the set scale weight when filling a DOT cylinder? - ✔✔TW on
collar
Weight of nozzle
LP capacity
✔✔What is the largest amount of LP that can be transported in an enclosed vehicle? -
✔✔90 lbs
✔✔What is the largest size propane container that can be transported in an enclosed
vehicle? - ✔✔45lbs
✔✔In what position should a container be transported? - ✔✔Pressure relief in the
intended use position
✔✔How many feet around the dispensing unit must be kept free of debris and other
combustible materials? - ✔✔10 ft
