Plumbing Level 3 Exam Practice: 60 Questions & Verified Answers (2024)

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PLUMBING LEVEL 3 EXAM ACTUAL EXAM 60

QUESTIONS AND CORRECT DETAILED ANSWERS

|ALREADY GRADED A

In liquid-volume measure using the english system, 1 gallon is

equal to 4 quarts or_ .....ANSWER.....128 fluid ounces

The International System of units is another name for the_

.....ANSWER.....metric system

Floor space is measured in_ .....ANSWER.....Area

A three-sided figure with two sides of equal length is called

a(n)_ .....ANSWER.....Isosceles Triangle

A typical cause of siphonage and back pressure is _

.....ANSWER.....Improper DWV Venting

The same basic internal parts are used on angle valves,

compression faucets, and _ .....ANSWER.....Globe valves

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At the end of each workday, all installed pipes should be _

.....ANSWER.....capped

The purpose of the quartz sleeve in an ultraviolet-light system is

to _ .....ANSWER.....Prevent the water in the disinfecting chamber

from cooling the lamp

Water that contains a high percentage of minerals is called _

.....ANSWER.....hard water

Water Hardness is measured in grains per _ .....ANSWER.....cubic

centimeter

The water line supplying a swimming pool requires the

installation of a(n) _ .....ANSWER.....Pressure-type vacuum

breaker

Dual-check valve backflow preventer assemblies are difficult for

plumbers to remove, test, or replace because they _

.....ANSWER.....are not normally fitted with shutoff valves or test

cocks