[D2L] 102IA&B Flashcards
Who is responsible for the approval of the installation of gas fired appliances?
The authority having jurisdiction
The responsibilities of a gasfitter include the venting of gas appliances
True
Who is qualified to run a gas line underground from a house to a garage?
A&B Gasfitter
Natural Rubber is the only approved gasket material for gas appliances
False, because the oil dissolves
PE piping is only to be used underground
True
What is the proper number for the CSA/CSA-Natural Gas and Propane Installation code?
B149.1
What pressure is propane after the 2nd stage regulator delivered?
11” wc
Who installs services and adjusts the service regulator which is usually set at 7-14” wc on a residential natural gas installation?
The utility company
What underground piping needs a tracer wire?
PE plastic
All underground piping or tubing must have sufficient cover to prevent damage to the gas line. What is the minimum depth for a trench?
12”
A defective section of gas piping or tubing may be repaired by a qualified gas fitter
False
What location can a swing joint not be installed?
Concealed location
What is the minimum inches underground gas piping running under a commercial drive be?
24”
What is the minimum psi rating piping used in gas installations be rated for?
125 psi
Close nipples shall only be used in applications where there is insufficient space to allow the installation of a standard nipple
False, You can’t use close nipples
What standards of pressure testing shall a residential piping system with less than 200 feet of piping adhere to during the rough in stage?
15 psi for 15 minutes
What minimum face diameter must a gas pressure gauge have when testing gas lines?
3”
What type of Copper tubing can be laid underground without needing to be coated with an extruded PVC or PE Resin at time of manufacture?
K
Hose and Hose fittings must be rated for
350 psi
Maximum allowable pressure drop on a low-pressure gas system is
1” WC
Threaded bushings are not allowed on gas lines
False, they are allowed
A dirt pocket must be at least
3” in depth(length)
Gas fittings which are not allowed to be concealed are:
Unions, also swing joints
Which fitting is prohibited?
Close Nipple
Any point where gas lines go through a concrete wall they must be
sleeved or wrapped
The finish piping is installed after the rough in piping and pressure tested at working pressure
True
Dirt pockets are required on all RTU’s
False
When drilling a hole in a joist it must be how far away from the top and bottom of the joist?
2”
To add a gas line to a system, you can avoid having to increase pipe sizes as long as your tee is within how close to the meter?
24”
