NATIONAL FUEL GAS CODE EXAM
CERTIFICATION EVALUATION TEST 2026 FULL
QUESTIONS AND CORRECT ANSWERS
ALREADY PASSED GRADED A+
◉ What CPN covers metallic piping joints and fittings? Answer: 5.6.7
◉ What CPN covers plastic piping joints and fittings? Answer: 5.6.8
◉ Line gas pressure regulators shall be listed in accordance with?
Answer: 5.8..2.2
◉ Please explain the two ways we accomplish venting a line gas
pressure regulator. Answer: Piping a vent at or the installation a vent
limiter
◉ What will be required when the available supply pressure is
higher than what the appliance is designed for? Answer: A Line
Pressure Regulator
◉ Normal ASP for LP gas is? Answer: 11"w.c. to 14" w.c.
,◉ 1 cubic foot of LP gas approximately contains how many BTU's?
Answer: 2,500 BTU (2.5 mBTU)
◉ Metallic pipe threads shall be what? Answer: Cut to specific
lengths and sized using the charts
◉ Normal manifold pressure for LP gas is? Answer: 10"w.c.
◉ Normal manifold pressure for natural gas is? Answer: 3.5"w.c.
◉ The maximum design operating pressure for piping located inside
a building shall not exceed? Answer: 5 PSIg
◉ The maximum design operating pressure for any gas piping
system shall not exceed? Answer: 125 PSIg
◉ According to NFPA54 Gas piping systems shall be sized and
installed to satisfy maximum demand of the system while ensuring
what? Answer: Each appliance receives not less than the minimum
manifold pressure it requires
◉ Normal ASP for Natural gas is? Answer: 3.5"w.c. to 8"w.c.
, ◉ Please convert the following appliance input into the most
appropriate unit of measurement for the use with the charts
pertaining to natural gas. 150,000 BTU/Hr. Answer: 150,
= 60cuft
◉ 1 cubic foot of Natural gas approximately contains how many
BTU's? Answer: 2,500 BTU
◉ What shall be requirement to be included on a piping plan?
Answer: Location , Sections , Segments, Outlets, Legend, Available
Supply Pressure.
◉ Who determines where the point of delivery will be? Answer: The
Serving Gas Supplier
◉ What type of Plastic piping shall be used as gas pipe? Answer:
Polyethylene Pipe or Polyamide
◉ Can PVC be used as plastic piping? What is PVC commonly used
for? Answer: No however it is commonly used for vent piping on gas
regulators.
◉ What is the purpose of an excess flow valve? Answer: Stop the
flow of gas when flow exceeds the rating of the valve (such as a
major pipe rupture)
CERTIFICATION EVALUATION TEST 2026 FULL
QUESTIONS AND CORRECT ANSWERS
ALREADY PASSED GRADED A+
◉ What CPN covers metallic piping joints and fittings? Answer: 5.6.7
◉ What CPN covers plastic piping joints and fittings? Answer: 5.6.8
◉ Line gas pressure regulators shall be listed in accordance with?
Answer: 5.8..2.2
◉ Please explain the two ways we accomplish venting a line gas
pressure regulator. Answer: Piping a vent at or the installation a vent
limiter
◉ What will be required when the available supply pressure is
higher than what the appliance is designed for? Answer: A Line
Pressure Regulator
◉ Normal ASP for LP gas is? Answer: 11"w.c. to 14" w.c.
,◉ 1 cubic foot of LP gas approximately contains how many BTU's?
Answer: 2,500 BTU (2.5 mBTU)
◉ Metallic pipe threads shall be what? Answer: Cut to specific
lengths and sized using the charts
◉ Normal manifold pressure for LP gas is? Answer: 10"w.c.
◉ Normal manifold pressure for natural gas is? Answer: 3.5"w.c.
◉ The maximum design operating pressure for piping located inside
a building shall not exceed? Answer: 5 PSIg
◉ The maximum design operating pressure for any gas piping
system shall not exceed? Answer: 125 PSIg
◉ According to NFPA54 Gas piping systems shall be sized and
installed to satisfy maximum demand of the system while ensuring
what? Answer: Each appliance receives not less than the minimum
manifold pressure it requires
◉ Normal ASP for Natural gas is? Answer: 3.5"w.c. to 8"w.c.
, ◉ Please convert the following appliance input into the most
appropriate unit of measurement for the use with the charts
pertaining to natural gas. 150,000 BTU/Hr. Answer: 150,
= 60cuft
◉ 1 cubic foot of Natural gas approximately contains how many
BTU's? Answer: 2,500 BTU
◉ What shall be requirement to be included on a piping plan?
Answer: Location , Sections , Segments, Outlets, Legend, Available
Supply Pressure.
◉ Who determines where the point of delivery will be? Answer: The
Serving Gas Supplier
◉ What type of Plastic piping shall be used as gas pipe? Answer:
Polyethylene Pipe or Polyamide
◉ Can PVC be used as plastic piping? What is PVC commonly used
for? Answer: No however it is commonly used for vent piping on gas
regulators.
◉ What is the purpose of an excess flow valve? Answer: Stop the
flow of gas when flow exceeds the rating of the valve (such as a
major pipe rupture)
