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IFGC 2021 > Chapter 4 – gas piping installations > Flashcards

Chapter 4 – gas piping installations Flashcards

1
Q

For other than steel pipe, exposed piping, Shall be identified by a yellow label marked “gas” and shall be spaced at intervals, not less than:

A

5 feet

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2
Q

Gas labels shall have a ____ background, and have___ lettering

A

Yellow, black

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3
Q

Piping from multiple meter installations shall be marked with an approved permanent identification by the installer so that the piping system supplied by each meter is

A

Readily identifiable

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4
Q

The volumetric flow rate of gas to be provided should be adjusted for altitude where the installation is

A

2000 feet in elevation

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5
Q

The maximum operating pressure for piping systems located inside of buildings shall not exceeded ____.

A

5PSIG

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6
Q

True or false piping inside of buildings is allowed to exceed 5 PSIG If the piping joints are welded or braised, or the piping joints are flanged, and the connections are made by welding or brazing

A

True

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7
Q

Pipe, fittings, valves and other material shall not be used again, except where they are free of foreign materials And have been ascertained to be

A

Adequate for the service intended

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8
Q

Cast-iron pipe ____ be used

A

Shall not

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9
Q

Stainless steel, steel, and wrought iron pipe shall not be lighter than

A

Schedule 10

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10
Q

Aluminum alloy pipe shall not be used in:

A

Exterior locations or underground

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11
Q

PVC and CPVC pipe, tubing, and fittings

A

Shall not be used to supply fuel gas

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12
Q

What table shows the specifications for threading metallic pipe?

A

Table 403.9.2

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13
Q

Threaded joint compound shall be resistant to the action of

A

Liquefied petroleum gas

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14
Q

_______ and heavier pipe joints shall be threaded, flanged, braised, welded, or assembled with press, connect fittings

A

Schedule 40

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15
Q

Pipe lighter than schedule 40 Shelby connected, using press, connect fittings, flanges, ______ or ______

A

Welding or brazing

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16
Q

Threaded fittings in sizes larger than _____ shall not be used

A

4 inches

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17
Q

true, or false: cast-iron flanges shall be permitted

A

True

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18
Q

True or false cast-iron bushings shall not be used

A

True

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19
Q

Piping shall not be installed in or through a ______ supply, return, or exhaust

A

Ducted

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20
Q

Piping shall not be installed in a clothes

A

Chute

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21
Q

Piping shall not be installed in a chimney or

A

Gas vent

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22
Q

True or false piping is permitted to be installed inside of elevator shafts, and dumbwaiters

A

False

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23
Q

Piping installed downstream of the point of delivery shall not extend through any townhome unit other than:

A

The unit being served by piping

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24
Q

Gas piping shall not penetrate building foundation walls at any point ____

A

Below grade

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25
Q

Gas piping shall enter and exit a building at a point ______ and the annular space between the pipe and the wall shall be sealed

A

Above grade

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26
Q

We’re piping is installed through holes or notches and framing members, and the piping is located less than ______ from the framing member face to which wall, ceiling, or floor membranes will be attached. The pipe shall be protected by shield plates.

A

1 1/2 inches

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27
Q

Piping protected by shield plates shall have shield plates, providing protection a minimum ______ on either side of the framing member

A

4 inches

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28
Q

Where the framing member that the piping passes through is a bottom plate, bottom, track, top plate, or top track, the shield plates that cover the framing member and extend not less than

A

4 inches

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29
Q

We’re piping is located within framing members and is less than ______ From the face of the framing member to which wall, ceiling or floor membranes will be attached. The piping shall be protected by shield plates that cover the entire length of the piping

A

1 1/2 inches

30
Q

Shield plates, shall be of steel material, having a thickness of not less than

A

0.0575 inches (16 gauge)

31
Q

Piping in solid floors shall be laid in

A

Channels in the floor

32
Q

When piping is laid inside of channels in flooring, the piping shall be covered in a matter that will allow

A

Access to the piping

33
Q

Piping installed in floors, Shelby protected against

A

Excessive moisture

34
Q

An alternative to installation of channels, is the use of installing the pipe and a conduit of

A

Schedule, steel, wrought iron, PVC or ABS

35
Q

Conduit with one end terminating outdoors, the conduit shall extend into an occupied portion of the building and, at the point where the conduit terminates in the building the space between the conduit and the piping shall be sealed to prevent the possible entrance of gas leakage the conduit shall extend not less than

A

2 inches above the floor

36
Q

When located outside of the building, the conduit shall extend not less than _____ outside of the building

A

4 inches

37
Q

When located inside of a building, conduit with both ends terminating indoors shall extend not less than

A

2 inches above the floor

38
Q

In general underground piping systems, shall be installed at a minimum depth of:

A

12 inches

39
Q

Individual gas lines to outdoor lights, grills, and other appliances shall be installed, not less than:

A

8 inches below finish grade

40
Q

The unthreaded portion of piping outlets shall extend not less than _____ through finished ceilings and walls and where extending through Floors or outdoor patios and slabs, shall not be less than

A

1 inch, 2 inches

41
Q

Plastic pipe shall be installed:

A

Outdoors underground only

42
Q

Plastic pipe shall not exceed pressures greater than

A

100 PSI for natural gas or 30 PSIG for LP gas

43
Q

What color shall the tracer wire be installed in underground gas piping?

A

Yellow

44
Q

The tracer wire shall not be less than

A

18 AWG, direct burial, rated

45
Q

Pipe shall not be bent through an arc of more than

A

90°

46
Q

The inside radius of a bend shall not be less than _____ the outside diameter of the pipe

A

Six times

47
Q

For plastic piping bends, the radius of the inner curve of such bends shall not be less than

A

25 times the inside diameter of the pipe

48
Q

The test medium shall be:

A

Air, nitrogen, carbon dioxide, or an inert gas

49
Q

When testing gas lines oxygen shall:

A

Not be used as a test, medium

50
Q

The test pressure used shall be not less than

A

1 1/2 times the proposed maximum working pressure but not less than 3PSIG

51
Q

The test duration shall not be less than______ for each ______ of pipe volume

A

1/2 hour… 500 ft.³

52
Q

The leakage shall be located by means of an approved gas detector or a______ leak detection fluid

A

Non-corrosive

53
Q

Piping for other than dry, gas conditions, shall be sloped not less than

A

1/4 inch and 15 feet

54
Q

Sediment traps shall be made of a tee fitting and of a nipple of

A

Any length

55
Q

Illuminating appliances, ranges, clothes, dryers, decorative vented appliances for installation and fireplaces, gas fireplaces, and outdoor grills

A

Do not require settlement traps

56
Q

In a common system, serving more than one building, a shut off valve shall be installed:

A

Outdoors at each building

57
Q

shut off valves are located within the same room as the appliance the shut off valve shall be within

A

6 feet of the appliance

58
Q

Shut off valves shall be installed upstream of:

A

Unions or disconnects for the device it serves

59
Q

Pressure regulators that require venting shall be directly vented to:

A

The outdoors

60
Q

Appliance connectors shall have an overall length not to exceed:

A

6 feet

61
Q

MP regulators shall be required to have a union installed within ______ upstream or downstream of the regulator on rigid piping

A

12 inches

62
Q

A tee fitting with one opening capped or plugged shall be installed between the MP regulator and it’s upstream

A

Shut off valve

63
Q

Steel pipe that is 1/2 inch diameter shall be supported every

A

6 feet

64
Q

Steel pipe three-quarter or 1 inches in diameter shall be supported every

A

8 feet

65
Q

Inch and a quarter or larger steel pipe shall be supported horizontally every

A

10 feet

66
Q

Inch and a quarter or larger piping that passes vertically between floors shall be supported at

A

Every floor level

67
Q

For pipe other than steel that is half inch in diameter, the piping shall be supported every

A

4 feet

68
Q

For pipe or tubing other than steel that is 5/8 or 3/4 the piping shall be supported every

A

6 feet

69
Q

For piping that is other than steel that is 7/8 or 1 inch

A

Shall be supported every 8 feet

70
Q

In gas piping installations, CNG storage in dispensing equipment must not be installed within ________, unless installed in a vault.

A

10 feet of an ignition source

71
Q

In gas piping installations, CNG storage in dispensing equipment must not be installed within ________, unless installed in a vault.

A

10 feet of an ignition source

72
Q

Plastic fittings, pipe and tubing must comply with ________ to be used for fuel gas applications.

A

ASTM D2513

IFGC 2021 (7 decks)

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