Other Skilled Trades Pipefitting and Plumbing

Question 1

What is the minimum slope required for a residential drain pipe to ensure proper drainage per the IPC/UPC?

Accepted Answer

1/4 inch per foot

Answer

1/16 inch per foot

Answer

1/8 inch per foot

Answer

1/2 inch per foot

Question 2

What does the acronym PEX stand for in plumbing?

Accepted Answer

Cross-Linked Polyethylene

Answer

Polyethylene Expanded

Answer

Pressure Exchange pipe

Answer

Polymer Extruded Cross-section

Question 3

What is the purpose of a P-trap in a plumbing drain system?

Accepted Answer

To hold a water seal that prevents sewer gases from entering the building

Answer

To increase water pressure at fixtures

Answer

To filter debris from the drain line

Answer

To allow for pipe expansion and contraction

Question 4

Which pipe material requires the use of solvent cement (glue) for joining?

Accepted Answer

PVC and CPVC pipe

Answer

Copper pipe

Answer

Galvanized steel pipe

Answer

PEX tubing

Question 5

What is the standard residential hot water temperature set point recommended by the US Department of Energy to balance scald prevention and Legionella control?

Accepted Answer

120°F

Answer

100°F

Answer

110°F

Answer

140°F

Question 6

What does 'water hammer' refer to in a plumbing system?

Accepted Answer

A pressure surge caused by the sudden stopping of flowing water

Answer

A type of pipe fitting tool

Answer

Low water pressure in the system

Answer

Banging pipes due to inadequate support