Plumbing Pipe Systems & Materials 3

Question 1

Which pipe joint method uses heat to melt and fuse thermoplastic pipes together?

Accepted Answer

Butt fusion

Answer

Butt fusion uses a heating plate to melt the ends of thermoplastic pipes, which are then pressed together to form a permanent fused joint.

Question 2

What is the correct way to measure the length of pipe needed for a socket-type fitting connection?

Accepted Answer

Add the socket depth to each end of the face-to-face measurement

Answer

When calculating pipe length for socket fittings, you must add the socket depth for each fitting end to the face-to-face measurement to get the total cut length.

Question 3

ABS pipe is typically used in which application?

Accepted Answer

Drain, waste, and vent systems

Answer

ABS (acrylonitrile butadiene styrene) pipe is primarily used in drain, waste, and vent (DWV) systems due to its impact resistance and affordability.

Question 4

What is the purpose of pipe strapping or hangers?

Accepted Answer

To support and secure pipe runs to prevent sagging

Answer

Pipe straps and hangers support and secure pipe runs to structural members, preventing sagging, movement, and stress on joints.

Question 5

What material should NEVER be used to join copper pipe to a gas appliance connector?

Accepted Answer

Aluminum fittings

Answer

Aluminum fittings should never be used with copper pipe in gas connections because the two metals can corrode each other through galvanic action.

Plumbing Practice Test

Plumbing Practice Test

Plumbing Pipe Systems & Materials 3