G3 Piping and Tubing Systems 2

Question 1

What is the standard test pressure for new residential gas piping?

Accepted Answer

15 psi

Answer

3 psi

Answer

7 psi

Answer

50 psi

Question 2

What type of pipe thread sealant is approved for gas connections?

Accepted Answer

Yellow Teflon tape or approved gas-rated pipe dope

Answer

Standard white Teflon tape

Answer

Any silicone sealant

Answer

No sealant needed

Question 3

What is a drip leg (sediment trap) on a gas line?

Accepted Answer

Collects moisture, dirt, and debris before they reach appliance controls

Answer

Drains condensation from gas supply

Answer

Reduces gas pressure

Answer

Provides a gauge connection point

Question 4

What is CSST and its special installation requirement?

Accepted Answer

Corrugated Stainless Steel Tubing; proper bonding/grounding

Answer

Copper Semi-Soft Tubing; silver brazing

Answer

Carbon Steel Standard Tubing; threading

Answer

Certified Safety Standard Tubing; double-wall

Question 5

What is the minimum burial depth for underground gas piping in Ontario?

Accepted Answer

18 inches (450 mm)

Answer

6 inches

Answer

12 inches

Answer

36 inches

Question 6

Why must gas piping be properly supported at specified intervals?

Accepted Answer

To prevent sagging, joint stress, and potential leaks from movement

Answer

For aesthetics only

Answer

To make piping easier to paint

Answer

Only required in commercial buildings