PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A

PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60 QUESTIONS AND CORRECT DETAILED ANSWERS |ALREADY GRADED A

PLUMBING LEVEL 3 EXAM 2026-2027 ACTUAL EXAM 60

QUESTIONS AND CORRECT DETAILED ANSWERS

|ALREADY GRADED A

A cross-connection becomes dangerous when there is a _ - ANSWERbackflow

If a leak is too small for escaping smoke to be visible, the leak may be

detected by _ - ANSWER- the odor of the smoke

The central vent in a building is the _ - ANSWER- vent stack

Calcium and magnesium salts in water are the cause of _ - ANSWERhardness

Acid in the water can react with copper pipes to leave stains that are _ -

ANSWER- green

The number of types of simple machines is _ - ANSWER- six

For calculating area, lengths and widths are expressed in _ - ANSWERmultiples of 12

To determine the proper measurements for a floor, always refer to the _ -

ANSWER- scale on the construction drawings

One cubic foot of water has a weight of _ - ANSWER- 62.31 pounds

Increasing the temperature of water will _ - ANSWER- decrease its

density but increase its volume

An efficient water supply system should provide, under peak demand

conditions, adequate pressure to the _ - ANSWER- farthest point of use

To decrease the amount of force needed to lift a load, you can _ -

ANSWER- combine several pulleys

The wheel and axle is a modification of the _ - ANSWER- basic pulley

concept

On the job, wear rubber-soled shoes or boots to _ - ANSWER- protect

against slipping and electrical shock

In a commercial building, customers who enter the area where you are

working should be _ - ANSWER- provided with appropriate personal

protective equipment

Condensation on pipes occurs when a cold surface is exposed to _ -

ANSWER- warm, moist air