Plumbing Pipe Systems & Materials

Question 1

Which pipe material is most commonly used for residential water supply lines in the US?

Accepted Answer

PEX

Answer

CPVC

Answer

Cast iron

Answer

Galvanized steel

Question 2

What is the minimum slope required for horizontal drain pipes 3 inches or less in diameter per the IPC?

Accepted Answer

1/4 inch per foot

Answer

1/8 inch per foot

Answer

1/2 inch per foot

Answer

1 inch per foot

Question 3

Which pipe is rated for both hot and cold water supply lines?

Accepted Answer

CPVC

Answer

PVC

Answer

ABS

Answer

Cast iron

Question 4

What is the standard color code for cold water supply lines using PEX tubing?

Accepted Answer

Blue

Answer

Green

Answer

Yellow

Answer

White

Question 5

Which pipe material requires primer before solvent cement is applied?

Accepted Answer

PVC

Answer

PEX

Answer

ABS

Answer

Copper

Question 6

What type of fitting connects two pipes of different materials, such as copper to CPVC?

Accepted Answer

Transition fitting

Answer

Union fitting

Answer

Dielectric union

Answer

Reducing coupling