PLUMBING LEVEL 3 EXAM -

PLUMBING LEVEL 3 EXAM -

QUESTIONS AND CORRECT DETAILED ANSWERS

|ALREADY GRADED A

A cross-connection becomes dangerous when there is a _ - ANSWER- backflow

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 _ - ANSWER- hardness

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 _ - ANSWER- multiples of 12

To determine the proper measurements for a floor, always refer to the _ - ANSWER- scale on the construction drawings 1 / 2

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

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