102I Intro to Gasfitting Codes & Regulations: Part B

Question 1

All pipe used in a gas installation should be what colour?

Answer 1

Black

Question 2

Schedule 40 pipe may be used for pressure up to

Answer 2

125 psig

Question 3

Which pipe can be buried underground w/o any coating

Answer 3

Type K, buried min. 18”

Question 4

All gas hoses & hose fittings shall have a minimum pressure rating of

Answer 4

350 psig

Question 5

The maximum allowable pressure drop on a low-pressure gas line system is

Answer 5

1” WC

Question 6

The maximum allowable pressure drop on a high-pressure system is

Answer 6

50% of standing pressure

Question 7

Drill holes must be located a minimum of

Answer 7

2 inches from any edge of a member

Question 8

What must be applied to the male threads only, so that excess dope is forced out of the pipe instead of pushed into the pipe

Answer 8

Pipe dope

Question 9

What tape is used for plumbing and is not approved for gasfitting?

Answer 9

white Teflon

Question 10

Teflon tape must be applied how?

Answer 10

1. wrapping it clockwise
2. stretching it with a 50% overlap
3. leaving the first 2 starter threads bare

Question 11

Malleable iron bushings must reduce at least

Answer 11

2 or more pipe sizes

Question 12

What is located in the gas pipe at the bottom of the final drop to an appliance?

Answer 12

Dirt pocket

Question 13

Gaskets used in gas systems may not be natural rubber?

T or F

Answer 13

True as the gas tends to dissolve and break down the gasket

Question 14

The minimum depth of the pocket is

Answer 14

3 inches

Question 15

The fittings required to make up a dirt or drip pocket are:

Answer 15

a tee
a cap
a nipple

Question 16

Unions and swing joints loosen over time?

T or F

Answer 16

True

Question 17

The Electrical Code prohibits the use of gas pipe as a conductor?

T or F

Answer 17

True

Question 18

Close nipples are not allowed to use

T or F

Answer 18

True

Question 19

All underground piping or tubing must have sufficient cover to prevent damage to the gas line. In some cases, the depth will have to be increased,

Answer 19

but it shall never be less than 15”
Gas lines installed under a commercial driveway will require 24”

Question 20

Piping shall not pass under a foundation wall or footing

T or F

Answer 20

True

Question 21

All plastic gas lines must have a tracer wire?

T or F

Answer 21

True or equivalent attached to it prior to placing it in the trench

Question 22

The gas line shall be protected from the corrosive effects of the concrete

Answer 22

by sleeving or double wrapping

Question 23

All valves must be readily accessible and serviceable

T or F

Answer 23

True

Question 24

The hose must not be subjected to temperatures in excess of

Answer 24

125F

Question 25

The maximum range of the gauge shall exceed the test pressure by

Answer 25

at least 15%, but not more than 300%

Question 26

The finish piping will be tested under normal working pressure conditions with a soapy water solution and a 10-minute meter test dial test

T or F

Answer 26

True

Question 27

Minimum test for rough in piping is

Answer 27

15 psig for 15 minutes

Question 28

The minimum size test gauge is

Answer 28

3”