Free Master Plumber Plumbing Codes and Standards Questions and Answers

Question 1

According to most model plumbing codes, what is the maximum allowable horizontal distance for a cleanout on a 4-inch building drain?

Accepted Answer

100 feet

Answer

50 feet

Answer

75 feet

Answer

150 feet

Question 2

A master plumber is installing a backflow prevention device on a hose bibb to protect the potable water supply. Which of the following ASSE standards is most directly applicable to this specific device?

Accepted Answer

ASSE 1011

Answer

ASSE 1013

Answer

ASSE 1060

Answer

ASSE 1022

Question 3

When venting a plumbing fixture, what is the minimum vertical distance a vent pipe must rise above the fixture's flood-level rim before it can be offset horizontally?

Accepted Answer

6 inches

Answer

2 inches

Answer

4 inches

Answer

12 inches

Question 4

A commercial kitchen is being renovated. The new layout requires a floor drain to be located in an area where it will receive waste from multiple indirect sources, including a three-compartment sink and a dishwasher. Which of the following is a primary code consideration for this installation?

Accepted Answer

The drain must be equipped with a grease interceptor.

Answer

The floor drain must be individually vented.

Answer

The trap for the floor drain must have a deep seal.

Answer

The drain must be made of cast iron exclusively.

Question 5

Under the International Plumbing Code (IPC), what is the maximum developed length of a 2-inch trap arm from the trap weir to the vent fitting, assuming a slope of 1/4 inch per foot?

Accepted Answer

8 feet

Answer

5 feet

Answer

6 feet

Answer

10 feet

Question 6

Which of the following fittings is generally prohibited for use in a sanitary drainage system when changing from a horizontal to a vertical direction?

Accepted Answer

Sanitary tee

Answer

Wye and 1/8 bend combination

Answer

Long-sweep quarter bend

Answer

Short-sweep quarter bend