Chapter 7 (7.1.1 - 7.3.5.2) Wrong Answers Study Flashcards
(7.1.3) Protection Against Corrosion. Gas piping in contact with earth or other material that could corrode the piping shall be protected against corrosion in an approved manner. When dissimilar metals are joined underground, what shall be used? and what shall the pipe not be laid in contact with?
An insulating fitting or coupling shall be used and the pipe shall not be laid in contact with cinders
(7.1.5) Piping Through Foundation Wall. (a) Underground piping, where installed through the outer foundation or basement wall of a building, shall be what? (b) The space between the gas piping and the sleeve and between the sleeve and the wall shall be what?
(a)Encased in a protective sleeve or protected by an approved device or method.
(B) Sealed to prevent the entry of gas or water.
(7.1.6) Piping Underground Beneath Buildings. Where gas piping is installed underground beneath buildings, the piping shall be what?
Encased in an approved conduit designed to withstand the imposed loads and installed in accordance with 7.1.6.1 or 7.1.6.2
(7.1.6.1) Conduit with one end terminating outdoors.
the conduit shall extend to an accessible portion of the building and, at the point where the conduit terminates in the building, the space between the conduit and the gas piping shall be sealed to prevent the possible entrance of any gas leakage. Where the end sealing is of a type that retains the full pressure of the pipe, the conduit shall be designed for the same pressure as the pipe. The conduit shall extend at least _____(A)______, be ____(B)____, and installed to prevent entrance of ___(C)___.
(A) 4 inches outside the building
(B) Vented outdoors above ground level
(C) water and insects
(7.1.7.1) Connection of Plastic Piping. Plastic piping shall be installed ___(A)___.
Exception 1: Plastic piping shall be permitted to terminate aboveground where ___(B)___.
Exception 2: Plastic piping shall be permitted to terminate with a ___(C)___ including basements, where plastic piping is inserted in a piping material permitted for use in buildings.
(A) outdoors, underground only
(B) an anodeless riser is used
(C) wall head adapter aboveground in buildings
(7.2.3) Gas Piping to be Sloped. Piping for other than dry gas conditions shall be ______.
sloped not less than 1/4 inch in 15 feet to prevent traps
(7.2.4) Prohibited Locations. Gas piping in any building shall not be installed in or through ________ other than combustion air ducts.
a clothes chute, chimney or gas vent, dumbwaiters, elevator shaft, or air ducts
(7.2.5.1) Piping shall be supported with ___________, or building structural components, suitable for the size of the piping, of adequate strength and quality, and located at intervals so as to prevent or damp out excessive vibration
metal pipe hooks, metal pipe straps, metal bands, metal brackets, metal hangers
(7.3.2) Concealed piping in buildings. What type of fittings can be used in concealed piping in buildings?
Threaded elbows, tees and couplings, brazed fittings, welded fittings, and fittings listed to ANSI LC 1/ CSA 6.26 or ANSI LC4.
(7.3.4) Tubing in partitions. (1) A steel striker barrier not less than ___(A)___ thick or equivalent, is installed between the tubing and the finished wall and extends at least ___(B)___ of plates, firestops, wall studs, and so on.
(2) The tubing is installed in single runs and in not ___(C)___
(A) 0.0508
(B) 4 inches beyond concealed penetrations
(C) rigidly secured
