PC Plumber Pipe Installation & Repair 2

Question 1

When installing copper pipe with soldered joints, what is the minimum distance a solder joint must be from a previously made joint to prevent overheating?

Accepted Answer

4 inches

Answer

A minimum of 4 inches between solder joints prevents heat transfer from remelting previously made joints.

Question 2

Which type of pipe is best suited for underground water service lines due to its flexibility and corrosion resistance?

Accepted Answer

Type K copper

Answer

Type K copper has the thickest wall of all copper types and is rated for underground and exterior water service applications.

Question 3

A homeowner reports banging noises when shutting off faucets quickly. What is the most likely cause?

Accepted Answer

Water hammer

Answer

Water hammer occurs when fast-closing valves abruptly stop water flow, creating a pressure shockwave that causes pipes to bang.

Question 4

What is the correct slope for horizontal drainage pipe to ensure proper flow without solids settling?

Accepted Answer

1/4 inch per foot

Answer

A slope of 1/4 inch per foot provides adequate velocity to carry solids through horizontal drainage pipes.

Question 5

When making a repair to a leaking galvanized steel pipe, which fitting allows you to remove a section of pipe without turning the entire run?

Accepted Answer

Union

Answer

A union consists of three pieces that allow pipe sections to be disconnected and reconnected without rotating the entire pipe run.

(PC) Plumber Certification Practice Test

(PC) Plumber Certification Practice Test

PC Plumber Pipe Installation & Repair 2