1|Page
WATER DISTRIBUTION D2 CALIFORNIA
PRACTICE TEST QUESTIONS WITH
VERIFIED ANSWERS 2026
Disease causing bacteria are know as - correct-answer -pathogenic
Normally, surface water and groundwater have a PH range of - correct-answer -
6.8 to 8.5
Which is the best definition of turbidity in water? - correct-answer -anything in
water that scatters light
,2|Page
A competent person must inspect excavations and adjacent areas for hazards -
correct-answer -daily, prior to the start of work, and as needed throughout the
shift.
The component of a centrifugal pump sometimes installed on the end of a suction
pipe to hold the priming is known as a - correct-answer -foot valve
The principal purpose of an altitude valve on an elevated tank is to - correct-
answer -control maximum filling level in distribution storage.
The term primacy means the - correct-answer -authority by the states to
supersede the USEPA drinking water regulations.
Reciprocating positive displacement pumps are also known as - correct-answer -
Piston pumps
, 3|Page
Modertely hard water will have a hardness range of ----- mg/L as - correct-answer
-61 to 120
A common method for removing hydrogen sulfide from water is - correct-answer
-aeration
The treatment process designed to kill pathogenic organisms is - correct-answer -
disinfection
Lead in drinking water can result in - correct-answer -impaired mental functioning
in children.
WATER DISTRIBUTION D2 CALIFORNIA
PRACTICE TEST QUESTIONS WITH
VERIFIED ANSWERS 2026
Disease causing bacteria are know as - correct-answer -pathogenic
Normally, surface water and groundwater have a PH range of - correct-answer -
6.8 to 8.5
Which is the best definition of turbidity in water? - correct-answer -anything in
water that scatters light
,2|Page
A competent person must inspect excavations and adjacent areas for hazards -
correct-answer -daily, prior to the start of work, and as needed throughout the
shift.
The component of a centrifugal pump sometimes installed on the end of a suction
pipe to hold the priming is known as a - correct-answer -foot valve
The principal purpose of an altitude valve on an elevated tank is to - correct-
answer -control maximum filling level in distribution storage.
The term primacy means the - correct-answer -authority by the states to
supersede the USEPA drinking water regulations.
Reciprocating positive displacement pumps are also known as - correct-answer -
Piston pumps
, 3|Page
Modertely hard water will have a hardness range of ----- mg/L as - correct-answer
-61 to 120
A common method for removing hydrogen sulfide from water is - correct-answer
-aeration
The treatment process designed to kill pathogenic organisms is - correct-answer -
disinfection
Lead in drinking water can result in - correct-answer -impaired mental functioning
in children.
