Texas CNG Category 3 Exam Graded A+
125% of the Marked service pressure - ANSWER-DOT cylinders must not be subjected
to pressures and excess of
18 inch cover maybe reduced to 12 inches if - ANSWER-Piping is not in an area
subjected to traffic
18 inches in concrete - ANSWER-Vertical support for guard rails must be anchored
below ground a minimal
2 inches above the grade of any other fuel dispenser - ANSWER-automatic dispenser
must be secured to the concrete on a minimal of 6 inches above normal grade
250 psig - ANSWER-Vapor recovery receivers must have a minimum rating service
pressure of
30 inches above ground - ANSWER-Vertical support for guardrails must be
6 feet or directly beneath the electric transmission line - ANSWER-CNG equipment
must not be located
6,000 psi or greater - ANSWER-All pipe fittings must be forged steel stamped
A cylinder bracket must be capable of - ANSWER-the static force in any direction of
eight times the weight of the fully pressurized cylinder
A hydrostatic test of at least four times the rated working pressure without structural
failure - ANSWER-Piping, tubing, fittings, and other piping components between a
cylinder or pressure vessel and the first shutoff valve must be capable of withstanding
A means must be provided to prevent - ANSWER-Flow or accumulation of flammable or
combustible materials under cylinders
A minimum clearance of 2 feet must be maintained - ANSWER-In the fencing of the
compression equipment, cylinder Cascades, or containers, and the entire dispensing
system
A pressure relief device must be provided - ANSWER-In the transfer system to prevent
overpressure of a vehicle
A pull away device must be installed so that - ANSWER-It can separate by force no
greater than 45 pounds applied in the horizontal direction
, A residential fueling facility must be equipped with - ANSWER-Emergency manual
shutdown of gas and power
After installation connections must be checked with - ANSWER-A non-ammonia soap
solution or leak detection instrument
All fenced enclosures must have at least one gate - ANSWER-That is locked whenever
the area enclosed is unattended
All piping must be schedule 80 - ANSWER-pipe fittings must be forged steel stamped
6000 PSI or greater
All tubing connectors must be - ANSWER-A minimum of type 304 stainless steel
industrial type connectors having a minimum design pressure of 5000 psig
All tubing connectors must be - ANSWER-A minimum of type 304 stainless steel
industrial type connectors having a minimum design pressure of 5000 psig
Aluminum may be used - ANSWER-For approved meters
Automatic dispensers must use - ANSWER-A key, card, or code system
Automatic dispensing system must incorporate - ANSWER-A cut off valve with an
opening and closing device
Breakaway protection must - ANSWER-Cease to flow in the event of a pull-away
Cascade storage system - ANSWER-Storage in multiple cylinders
Clear space of 3 feet - ANSWER-Must be provided for access to all valves and fittings
on multiple groups of cylinders
CNG facilities must be - ANSWER-Constructed of noncombustible materials and at
least one side open and a roof design for ventilation
CNG form 1020 - ANSWER-turned in 14 calendar days of an incident accident
CNG form 1500 - ANSWER-30 days prior to construction
Initial submission $50
Resubmission $30
CNG form 1501 - ANSWER-Must be submitted within 10 calendar days after completion
of the CNG installation having an aggregate storage capacity of less than 240 standard
cubic feet of CNG
CNG service Hose must be - ANSWER-continuously and distinctively marked
125% of the Marked service pressure - ANSWER-DOT cylinders must not be subjected
to pressures and excess of
18 inch cover maybe reduced to 12 inches if - ANSWER-Piping is not in an area
subjected to traffic
18 inches in concrete - ANSWER-Vertical support for guard rails must be anchored
below ground a minimal
2 inches above the grade of any other fuel dispenser - ANSWER-automatic dispenser
must be secured to the concrete on a minimal of 6 inches above normal grade
250 psig - ANSWER-Vapor recovery receivers must have a minimum rating service
pressure of
30 inches above ground - ANSWER-Vertical support for guardrails must be
6 feet or directly beneath the electric transmission line - ANSWER-CNG equipment
must not be located
6,000 psi or greater - ANSWER-All pipe fittings must be forged steel stamped
A cylinder bracket must be capable of - ANSWER-the static force in any direction of
eight times the weight of the fully pressurized cylinder
A hydrostatic test of at least four times the rated working pressure without structural
failure - ANSWER-Piping, tubing, fittings, and other piping components between a
cylinder or pressure vessel and the first shutoff valve must be capable of withstanding
A means must be provided to prevent - ANSWER-Flow or accumulation of flammable or
combustible materials under cylinders
A minimum clearance of 2 feet must be maintained - ANSWER-In the fencing of the
compression equipment, cylinder Cascades, or containers, and the entire dispensing
system
A pressure relief device must be provided - ANSWER-In the transfer system to prevent
overpressure of a vehicle
A pull away device must be installed so that - ANSWER-It can separate by force no
greater than 45 pounds applied in the horizontal direction
, A residential fueling facility must be equipped with - ANSWER-Emergency manual
shutdown of gas and power
After installation connections must be checked with - ANSWER-A non-ammonia soap
solution or leak detection instrument
All fenced enclosures must have at least one gate - ANSWER-That is locked whenever
the area enclosed is unattended
All piping must be schedule 80 - ANSWER-pipe fittings must be forged steel stamped
6000 PSI or greater
All tubing connectors must be - ANSWER-A minimum of type 304 stainless steel
industrial type connectors having a minimum design pressure of 5000 psig
All tubing connectors must be - ANSWER-A minimum of type 304 stainless steel
industrial type connectors having a minimum design pressure of 5000 psig
Aluminum may be used - ANSWER-For approved meters
Automatic dispensers must use - ANSWER-A key, card, or code system
Automatic dispensing system must incorporate - ANSWER-A cut off valve with an
opening and closing device
Breakaway protection must - ANSWER-Cease to flow in the event of a pull-away
Cascade storage system - ANSWER-Storage in multiple cylinders
Clear space of 3 feet - ANSWER-Must be provided for access to all valves and fittings
on multiple groups of cylinders
CNG facilities must be - ANSWER-Constructed of noncombustible materials and at
least one side open and a roof design for ventilation
CNG form 1020 - ANSWER-turned in 14 calendar days of an incident accident
CNG form 1500 - ANSWER-30 days prior to construction
Initial submission $50
Resubmission $30
CNG form 1501 - ANSWER-Must be submitted within 10 calendar days after completion
of the CNG installation having an aggregate storage capacity of less than 240 standard
cubic feet of CNG
CNG service Hose must be - ANSWER-continuously and distinctively marked
