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NATIONAL FUEL GAS CODE EXAM
NEWEST 2025 ACTUAL EXAM COMPLETE
200 QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
Where a minimum of 12 inches of cover cannot be provided, the pipe shall be installed in ____ or bridged (shielded). - ANSWER-conduit
The trench for gas piping shall be ___ so that the pipe has a firm, substantially continuous bearing on the bottom of the trench. - ANSWER-graded
Underground gas piping, where installed through the outer foundation or basement wall of a building, shall be encased in a ___ ___ or protected by and approved device or method. - ANSWER-protective sleeve
The space between the gas piping and the sleeve and between the sleeve and the wall shall be ___ to prevent entry of gas and water - ANSWER-sealed 1 / 4
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Plastic pipping shall be installed ___, ___ only - ANSWER- outdoors, underground
Connections made between metallic and plastic piping ___ ___
made with fittings conforming to one of the following:
ASTM D 2513
ASTM F 1973
ASTM F 2509 - ANSWER-shall be
An electrically continuous corrosion resistant ___ ___ or tape shall be buried with the plastic pipe to facilitate locating, & __ end shall be brought above ground at a building wall or riser. - ANSWER-tracer wire, one
Piping installed aboveground shall be ___ ___ and located where it will be protected from physical damage. - ANSWER- securely supported
Where passing through an exterior wall, the piping shall also be protected from ___ by coating or wrapping with an inert material approved for such applications. - ANSWER-corrosion 2 / 4
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The piping shall be ___ around its circumference at the point of the exterior penetration to prevent the entry of water, insects, and rodents. - ANSWER-sealed
Piping for other than dry gas conditions shall be sloped no less than ___ in 15 ft to prevent traps. - ANSWER-1/4 inch
Gas piping inside any building ___ ___ be installed in or through a clothes chute, chimney, or gas vent, dumb waiter, elevator shaft, or air duct, other than combustion air ducts - ANSWER-shall not
Piping ___ ___ supported with metal pipe hooks, metal pipe straps, metal band, metal brackets, metal hangers, or building structural components, suitable for the size of piping of adequate strength and quality, and located at intervals so as to prevent or damp out excessive vibration. - ANSWER-shall be
Gas piping installed on the roof surfaces shall be ___ above the roof surface and shall be supported in accordance with table 7.2.5.2 - ANSWER-elevated
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Gas fittings installed in concealed locations shall be limited to
the following:
1)______
2)_____
3)_____ - ANSWER-1) Threaded elbows, tees, and couplings 2)Brazed fittings 3) Welded fittings
For other than dry gas conditions, a drip ___ ___ provided at any point in the line of pipe where condensate could collect. - ANSWER-shall be
All drips shall be installed only in such locations that they are ___ ___ to permit cleaning or emptying - ANSWER-readily accessible
A drip shall not be located where the condensate is likely to ___.
- ANSWER-freeze
Each gas outlet, including a valve, shall be ___ gastight with a threaded plug or cap immediately after installation and shall be
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