NFPA 58 QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS
What is the definition of a portable container?
-ANSWER ✔✔ A container designed to be moved readily
Define universal cylinder
-ANSWER ✔✔ A cylinder that can be connected for service in either the vertical
or horizontal position, so that the fixed maximum liquid level gauge, pressure
relief device, and withdrawal appurtenances function properly in either position.
LP gas portable cylinders must be ___________ in accordance with US
Department of Transportation
-ANSWER ✔✔ designed, fabricated, tested, and marked
ASME LP gas motor/mobile fuel containers must be ___________ in accordance
with the "Rules for Construction of Unfired Pressure Vessels," Section VIII,
ASME Boiler and Pressure Vessel Code
-ANSWER ✔✔ designed, fabricated, tested, and marked
Is it permissible for an LP-gas portable container built prior to April 1, 1967, in
accordance with Interstate Commerce Commission (ICC) regulations to remain in
LP-gas service, provide all other requirements are met? -ANSWER ✔✔Yes
What type of cylinders which are involved in a fire must be permanently removed
from service? -ANSWER ✔✔Aluminum and composite cylinders
The minimum design or service pressure of cylinders must comply with what
regulations? -ANSWER ✔✔Title 49 CFR (DOT)
Appurtenances and connections of cylinders 1,000 lb water capacity or less must
be protected using what means? -ANSWER ✔✔A ventilated cap or ventilated
collar
What cylinder marking must be indicated in pounds? -ANSWER ✔✔water
capacity
Is the LP-gas capacity required to be marked on a DOT cylinder? -ANSWER
✔✔No
,What are the replacement requirements for a pressure relief valve installed on a
forklift cylinder? -ANSWER ✔✔12 years/10 years
What are the fabrication requirements for an LP gas hose, hose connections, and
flexible connectors? -ANSWER ✔✔resistant to LP gas
What are the minimum and maximum pressure settings for hydrostatic relief valves
in liquid piping? -ANSWER ✔✔400/500
What is the minimum distance requirement for a 1,000 water gallon container to a
building where no other container of more than 125 gallons is within 25 feet of the
1,000 gallon container? -ANSWER ✔✔10 feet
From what part of an underground container is the required distance to a building
or adjoining property measured? -ANSWER ✔✔container surface
How must a cylinder installed alongside a building be positioned for the relief
device to properly discharge? -ANSWER ✔✔3 feet horizontally from any building
and 5 feet from ignition source
What is the minimum distance from an above ground container to electrical power
lines? -ANSWER ✔✔600 volts and 6 feet
Where traffic is expected, how must a non-interchangeable underground container
be protected from vehicular damage? -ANSWER ✔✔18 inches
The discharge of the regulator vent for an underground container must be above
what? -ANSWER ✔✔highest portable water level
What are the minimum corrosion requirements for an underground container? -
ANSWER ✔✔protected or coated
What are the setting and back fill requirements for an underground container? -
ANSWER ✔✔surrounded by earth or sand free of rocks or abrasives
Regulators used outdoors must be installed or protected against what? -ANSWER
✔✔sleet, snow, or debris
, What is the vapor pressure limit for a corrugated stainless steel piping system? -
ANSWER ✔✔5 psig
If metallic piping is exposed above ground, may a bobtail driver fill the associated
container? -ANSWER ✔✔yes but it must be protected and supported from damage
Is it permissible to use polyethylene pipe installed above ground to provide fuel to
an LP-gas system? -ANSWER ✔✔No
When LP-gas liquid can be isolated between shutoff valves, what type of valve
must be installed in each closed section of piping? -ANSWER ✔✔hydrostatic
relief valve
What are the minimum design service pressure requirements for ASME LP-gas
mobile fuel containers? -ANSWER ✔✔250 or 312
What is the minimum service pressure for cylinders installed on recreational
vehicles? -ANSWER ✔✔240
LP-gas fuel containers installed on a passenger-carrying vehicle are limited to
________ gallons, aggregate water capacity. -ANSWER ✔✔200
A vehicle fuel dispenser installed under a weather shelter or canopy must be
ventilated and not enclosed more than ________ percent of of its perimeter. -
ANSWER ✔✔50
What are the location requirements for an identified and accessible switch or
circuit breaker at a fuel dispenser? -ANSWER ✔✔20/100
What is the maximum length of an LP-gas transfer hose on an LP-gas vehicle fuel
dispenser? -ANSWER ✔✔18 feet
What type of device is required to be installed on each LP-gas private, public or
forklift refueling installation that includes a liquid dispensing system? -ANSWER
✔✔emergency breakaway
WITH COMPLETE SOLUTIONS
What is the definition of a portable container?
-ANSWER ✔✔ A container designed to be moved readily
Define universal cylinder
-ANSWER ✔✔ A cylinder that can be connected for service in either the vertical
or horizontal position, so that the fixed maximum liquid level gauge, pressure
relief device, and withdrawal appurtenances function properly in either position.
LP gas portable cylinders must be ___________ in accordance with US
Department of Transportation
-ANSWER ✔✔ designed, fabricated, tested, and marked
ASME LP gas motor/mobile fuel containers must be ___________ in accordance
with the "Rules for Construction of Unfired Pressure Vessels," Section VIII,
ASME Boiler and Pressure Vessel Code
-ANSWER ✔✔ designed, fabricated, tested, and marked
Is it permissible for an LP-gas portable container built prior to April 1, 1967, in
accordance with Interstate Commerce Commission (ICC) regulations to remain in
LP-gas service, provide all other requirements are met? -ANSWER ✔✔Yes
What type of cylinders which are involved in a fire must be permanently removed
from service? -ANSWER ✔✔Aluminum and composite cylinders
The minimum design or service pressure of cylinders must comply with what
regulations? -ANSWER ✔✔Title 49 CFR (DOT)
Appurtenances and connections of cylinders 1,000 lb water capacity or less must
be protected using what means? -ANSWER ✔✔A ventilated cap or ventilated
collar
What cylinder marking must be indicated in pounds? -ANSWER ✔✔water
capacity
Is the LP-gas capacity required to be marked on a DOT cylinder? -ANSWER
✔✔No
,What are the replacement requirements for a pressure relief valve installed on a
forklift cylinder? -ANSWER ✔✔12 years/10 years
What are the fabrication requirements for an LP gas hose, hose connections, and
flexible connectors? -ANSWER ✔✔resistant to LP gas
What are the minimum and maximum pressure settings for hydrostatic relief valves
in liquid piping? -ANSWER ✔✔400/500
What is the minimum distance requirement for a 1,000 water gallon container to a
building where no other container of more than 125 gallons is within 25 feet of the
1,000 gallon container? -ANSWER ✔✔10 feet
From what part of an underground container is the required distance to a building
or adjoining property measured? -ANSWER ✔✔container surface
How must a cylinder installed alongside a building be positioned for the relief
device to properly discharge? -ANSWER ✔✔3 feet horizontally from any building
and 5 feet from ignition source
What is the minimum distance from an above ground container to electrical power
lines? -ANSWER ✔✔600 volts and 6 feet
Where traffic is expected, how must a non-interchangeable underground container
be protected from vehicular damage? -ANSWER ✔✔18 inches
The discharge of the regulator vent for an underground container must be above
what? -ANSWER ✔✔highest portable water level
What are the minimum corrosion requirements for an underground container? -
ANSWER ✔✔protected or coated
What are the setting and back fill requirements for an underground container? -
ANSWER ✔✔surrounded by earth or sand free of rocks or abrasives
Regulators used outdoors must be installed or protected against what? -ANSWER
✔✔sleet, snow, or debris
, What is the vapor pressure limit for a corrugated stainless steel piping system? -
ANSWER ✔✔5 psig
If metallic piping is exposed above ground, may a bobtail driver fill the associated
container? -ANSWER ✔✔yes but it must be protected and supported from damage
Is it permissible to use polyethylene pipe installed above ground to provide fuel to
an LP-gas system? -ANSWER ✔✔No
When LP-gas liquid can be isolated between shutoff valves, what type of valve
must be installed in each closed section of piping? -ANSWER ✔✔hydrostatic
relief valve
What are the minimum design service pressure requirements for ASME LP-gas
mobile fuel containers? -ANSWER ✔✔250 or 312
What is the minimum service pressure for cylinders installed on recreational
vehicles? -ANSWER ✔✔240
LP-gas fuel containers installed on a passenger-carrying vehicle are limited to
________ gallons, aggregate water capacity. -ANSWER ✔✔200
A vehicle fuel dispenser installed under a weather shelter or canopy must be
ventilated and not enclosed more than ________ percent of of its perimeter. -
ANSWER ✔✔50
What are the location requirements for an identified and accessible switch or
circuit breaker at a fuel dispenser? -ANSWER ✔✔20/100
What is the maximum length of an LP-gas transfer hose on an LP-gas vehicle fuel
dispenser? -ANSWER ✔✔18 feet
What type of device is required to be installed on each LP-gas private, public or
forklift refueling installation that includes a liquid dispensing system? -ANSWER
✔✔emergency breakaway
