Free Master Plumber MCQ Questions And Answers

Question 1

How much grade is typically needed for each liner foot of a domestic drainage pipe?

Accepted Answer

1/4 inch

Answer

3/4 inch

Answer

1 inch

Answer

1/8 inch

Question 2

What happens if the size of a 4 inch pipe is decreased in the flow's direction?

Accepted Answer

This could cause blockage to build up at the reduction point.

Answer

This could cause slugging in the waste system.

Answer

This will have no affect on the drainage system.

Answer

The waste will travel faster which will allow for better cleaning of the pipe.

Question 3

Vacuum pump exhaust must be discharged into the following areas in Med Gas systems:

Accepted Answer

Outdoors

Answer

Indirect drain

Answer

Relief vent

Answer

Designated receptor

Question 4

In the course of brazing, flux can only be applied when

Accepted Answer

Brazing copper to brass

Answer

Not allowed

Answer

Brazing copper to copper

Answer

Both Brazing copper to brass and Brazing copper to copper

Question 5

Gray water must be _____ when it enters a collection reservoir.

Accepted Answer

Filtered

Answer

Flow controlled

Answer

Monitored

Answer

Measured

Question 6

How long can gray water be kept in storage before it can be used to flush a toilet or urinal?

Accepted Answer

72 hours

Answer

96 hours

Answer

24 hours

Answer

48 hours

Question 7

A laundry chute has gas piping installed.

Accepted Answer

Is a code violation

Answer

Is required to be installed with only vertical pipe sections

Answer

Must be secured at maximum intervals of 6 feet

Answer

Must be protected from damage in the normal course of use of the chute