Gas code test section 6 Flashcards
Minimum fittings for a dirt pocket
Three fittings nipples count fittings cap, T, nipple
Maximum gas pressure coming into a building
66 psi
Maximum working pressure of a hose
350 psi
Question will relate to 100 psi coated pipe
100 psi coated pipe
Question relates to type L coated
Type L coated
All fittings used on copper gas installations must be pressurized for what
125 psi
Gas pressures above 125 psi require fittings designed for 250 psi
Threaded schedule 40 pipe is rated for a maximum of what psi
125 psi
Copper and steel tubing can be joined by these methods
Flared, brazed, and compression fittings
What type of copper is approved for below ground
Type K
Type L and G only approved if coded with the PVC resin or extruded polyethylene
What type of copper is approved for above ground?
Types L,k and G
Maximum length of a hose on a permanent installation
10 ft
Maximum length of hose on a portable appliance
30 feet
Maximum support spacing for half inch or less npS
Every 6 feet
Maximum spacing of supports for three-quarter to 1 inch
8 feet
Maximum spacing supports for inch and a quarter to 2 1/2 inch
10 feet
Maximum space for supports of tubing all sizes vertical and horizontal
6 feet
What’s the maximum length of a flex connecter on a vented appliance?
2 feet
Maximum length of flex connecter on an unvented appliance
6 feet
When pipe protrudes through a ceiling or wall what is the minimum amount of un threaded pipe exposed?
1 inch for walls and ceilings
2 inches for floors
Underground gas line depth
15 inches
24 inches for commercial where it traverses driveway or parking lot
Minimum threaded pipe size for natural gas
1/2”. Unless it’s schedule 80.
