Gas codes and Valves

Question 1

Valve operator

Answer 1

Stem, Bonnet, Stem guide and packing, Disc holder and skirt

Question 2

Disk/valve

Answer 2

Movable plate, needle, or ball that plugs

Question 3

Diaphragms are controlled by pressure and temperature?

Answer 3

False.

Question 4

Globe valves are very effective refrigeration controls

Answer 4

TRUE

Question 5

What’s an example of a automatic valve

Answer 5

TXV

Question 6

CPRs modulate based on what

Answer 6

FLA (Full Load Amps)

Question 7

If the FLA is not shown, how do you calculate it

Answer 7

FLA = LRA/6
(Lock Rotor Amps)

Question 8

PD valves

Answer 8

Pressure Differential valves
Pressure difference between 2 points

Question 9

Code of practice

Answer 9

National standard for the protection of the ozone

Question 10

Where is the ozone layer

Answer 10

In the stratosphere between 18-32km

Question 11

Relief valves are rated in

Answer 11

Pounds of air per minute

Question 12

Through who is 149.1 legislated through

Answer 12

Government of Alberta

Question 13

How far must components cable of igniting flammable substance be placed in residential areas and garages

Answer 13

18” in residential and 54” in garages

Question 14

For high altitude installations, what must you do to certified appliances

Answer 14

Derate it by 4% for every 1000 feet above 4500 feet

Question 15

What are the 2 sizes of black pipe and their max pressures

Answer 15

Sched 40 for up to 125psig and Sched 80 for all pressures

Question 16

Hoses and hose fittings must have a min pressure rating of how much

Answer 16

350psig

Question 17

Plastic pipe and fittings must be made from what

Answer 17

Polyethylene (PE)

Question 18

Plastic pipe can not be used for what and cannot be used for where

Answer 18

Cannot be used for liquid propane and cannot be used for the first 10 ft from the outlet of a vapourizer

Question 19

What copper tubing can be used underground if coated and not coated

Answer 19

G or L if coated and K no coating

Question 20

What is CSST and what’s it classified as

Answer 20

Corrugated stainless steel tubing, classified as pipe

Question 21

What materials can you use as tubing for gas

Answer 21

Steel, copper, or PVC

Question 22

When gas lines are being laid in concrete flooring, the lines must be:

Answer 22

encased in a duct having both ends open to atmosphere with at least 1/2” space
or
suspended in a trench with a removable top

Question 23

Fittings used in welded pipe installations must be

Answer 23

Manufactured not field fabricated

Question 24

In wooden framing, holes must be located how much from any edge

Answer 24

2” min

Question 25

Malleable iron bushings must reduce at least how many pipe sizes

Answer 25

at least 2 or more pipe sizes

Question 26

Can you repair defective piping

Answer 26

NO

Question 27

What type of fittings are prohibited for gas

Answer 27

Street fittings and close nipples

Question 28

What’s the min depth of underground piping

Answer 28

15” and 24” for commercial driveways

Question 29

What must be installed when running gas lines through concrete or brick walls

Answer 29

Sleeving or double wrapping

Question 30

The distance between piping identification must not exceed how much in commercial and residential?

Answer 30

20 ft in com and 6 ft in resi

Question 31

How far away can you install a gas cock from an appliance?

Answer 31

50 ft

Question 32

When a hose is used, it shall not exceed how long and how hot?

Answer 32

10 ft and 125 F

Question 33

Gas lines 4” NPS and larger must be purged with what

Answer 33

An inert gas

Question 34

Gas lines must be purged how far away from a building or air intake?

Answer 34

10 ft

Question 35

What’s considered high altitude for gas appliances?

Answer 35

2000+ ft above sea level