Water distribution (D3 test) Exam Newest 2026
Questions and Correct Detailed Answers Already
Graded A+
What is used to stop air leakage into the casing around a pump shaft when the
pump is operating under suction lift conditions - CORRECT ANSWER-Lantern
Ring
What type of valve usually serves as the pump suction isolation valve ? -
CORRECT ANSWER-Gate valve
Which agency sets legal limits on the concentration levels of harmful
contaminants in public water systems ? - CORRECT ANSWER-United States
Environmental Protection Agency
What type of pipe is durable , strong , has high flexural strength, is corrosion
resistant, and is easily tapped ? - CORRECT ANSWER-Ductile Iron
What is one advantage chlorine has over the other disinfectants? - CORRECT
ANSWER-Chlorine has a persistent residual
, The correct protective methods for back-flow-prevention devices in order of most
effective to least effective ? - CORRECT ANSWER-Air gap, RPZ, DCVS, and VB
New polyvinyl chloride pipe has a C value of about - CORRECT ANSWER-150+
A plat is a - CORRECT ANSWER-Map
The inlet thread on a standard AWWA corporation stop is called a _____ thread -
CORRECT ANSWER-Mueller thread
_______ head is the amount of energy in feet that a pump supplies to a fluid -
CORRECT ANSWER-Pump
Which type of temperature measuring devices uses two wires of different
materials - CORRECT ANSWER-Thermocouple
A _____ valve is a special kind of check valve - CORRECT ANSWER-Foot
A ______ joint is not flexible and therefore should not be buried - CORRECT
ANSWER-Flanged
Questions and Correct Detailed Answers Already
Graded A+
What is used to stop air leakage into the casing around a pump shaft when the
pump is operating under suction lift conditions - CORRECT ANSWER-Lantern
Ring
What type of valve usually serves as the pump suction isolation valve ? -
CORRECT ANSWER-Gate valve
Which agency sets legal limits on the concentration levels of harmful
contaminants in public water systems ? - CORRECT ANSWER-United States
Environmental Protection Agency
What type of pipe is durable , strong , has high flexural strength, is corrosion
resistant, and is easily tapped ? - CORRECT ANSWER-Ductile Iron
What is one advantage chlorine has over the other disinfectants? - CORRECT
ANSWER-Chlorine has a persistent residual
, The correct protective methods for back-flow-prevention devices in order of most
effective to least effective ? - CORRECT ANSWER-Air gap, RPZ, DCVS, and VB
New polyvinyl chloride pipe has a C value of about - CORRECT ANSWER-150+
A plat is a - CORRECT ANSWER-Map
The inlet thread on a standard AWWA corporation stop is called a _____ thread -
CORRECT ANSWER-Mueller thread
_______ head is the amount of energy in feet that a pump supplies to a fluid -
CORRECT ANSWER-Pump
Which type of temperature measuring devices uses two wires of different
materials - CORRECT ANSWER-Thermocouple
A _____ valve is a special kind of check valve - CORRECT ANSWER-Foot
A ______ joint is not flexible and therefore should not be buried - CORRECT
ANSWER-Flanged
