Safe Dispensing of Propane|| 60 QUESTIONS || CORRECT ANSWERS|| VERIFIED
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Course
LP Gas Master Qualifier: Gas Installation
Institution
LP Gas Master Qualifier: Gas Installation
Name 3 characteristics of propane - ANSWER colorless, odorless, tasteless
What is the initial boiling point of propane - ANSWER -44 degrees
What does one gallon of liquid propane weigh in pounds - ANSWER 4.2 pounds
How heavy is propane vapor compared to air? Propane liquid to water? - ANSW...
Safe Dispensing of Propane|| 60 QUESTIONS ||
CORRECT ANSWERS|| VERIFIED
Name 3 characteristics of propane - ANSWER colorless, odorless, tasteless
What is the initial boiling point of propane - ANSWER -44 degrees
What does one gallon of liquid propane weigh in pounds - ANSWER 4.2 pounds
How heavy is propane vapor compared to air? Propane liquid to water? - ANSWER 1.5 > 1. 1 and 1/2
more than air (SO4 < H20)
What is the limit of flammability in air, percent of vapor in air/gas mixture? - ANSWER 2.15%-9.6%
What is the most commonly used odorant in LP gases and why is it added? - ANSWER Ethynl Mercaptan
When liquid propane is released to the atmosphere, what is it's expansion ratio? - ANSWER 25%
Is propane non-toxic? - ANSWER Yes
Name several potential sources of ignition? - ANSWER Fans, switches, car ignitions, static, cigs.
When the outside temperature increases, what happens to propane inside a container? - ANSWER
Increase pressure
Name THREE types of specifications which propane containers are manufactured under. - ANSWER
Container info/ filling connections valves/ product storage area
, What does DOT stand for? ASME? FAA? - ANSWER Department of Transportation, American Society of
Mech. Engineering, Federal Aviation Admin.
How long after manufacture may a DOT Steel or Aluminum cylinder be used before re-certification is
required? How many re-certifications are allowed? - ANSWER 12 years, every 5, 7, 12 years (as many as
you want).
Can you rely on an OPD valve for accurate filling of a DOT cylinder - ANSWER NO
Is the float gauge alone a suitable method for filling - ANSWER NO
What must be done before a new DOT container may be filled - ANSWER Purge
Before filling a motor home, what steps should you take? - ANSWER Motor off, brakes set, passengers
out
What is the max amount of propane you may dispense into a container? - ANSWER 80% of its water
capacity
What must be done before any propane container may be refilled? - ANSWER Gates open, no ignition
source in 25ft of area, engines 15ft of shutoff, gloves, check valves, visual inspection
Personnel dispensing propane gas must have what? - ANSWER adequate training in proper LP gas
transfer procedure
Sources of ignition, including cigarettes, should be eliminated within how many feet of the filling
procedure? - ANSWER 25 feet
How do you determine the gas capacity of a DOT cylinder? Of an ASME container? - ANSWER DOT: shows
max in pounds.
ASME: shows max water gallons
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