WATER TREATMENT CERTIFICATION
EVALUATION TEST PAPER QUESTIONS
AND SOLUTIONS VERIFIED COMPLETE
●● A calm area within a settling basin necessary for suspended materials
to settle is the _____ zone.
Answer: Settling.
●● A centrifugal pump when operating normally shows a discharge
pressure of 100 psi and the venturi meter shows a flow rate of 20,000
gpm. Suddenly the pressure gauge drops to 90 psi and the flow rate
increases to 23,000 gpm. You would suspect
Answer: A large leak in the pump discharge line.
●● A chemical commonly used to raise PH is.
Answer: Lime.
●● A chlorine cylinder valve is thought to be leaking. If ammonia vapor
is passed near the valve. The presence of a leak would be indicated by.
Answer: White smoke.
●● A chlorine residual in water can be determined by using the regent.
Answer: Diethyl-p-phenylenediamine (DPD)
,●● A cylindrical tank with a radius of 5 ft and a height of 10 ft is filled
with water. If 3 lb of chemical is dissolved in the water, what is the
dosage?
Answer: 61 mg/L.
●● A cylindrical tank with a radius of 5 ft is filled to a depth of 10 ft
with water. Approximately how many gallons of water does it contain?
Answer: 5870 gal.
●● A flow of 1.55ft^3/s is______ gpm.
Answer: 696 gpm.
●● A grab sample represents.
Answer: The quality of the water at the time the sample was taken.
●● A heavy growth of algae in a surface water reservoir will have which
one of the following effects on the water?
Answer: Raise the pH.
●● A hypochlorinator is used to feed _______ into a water supply.
Answer: Hypochlorite solution.
, ●● A major cause of pump and motor shaft coupling wear is a.
Answer: Misalignment between pumps and motor flanges.
●● A number of grab sample test results that are averaged together
constitute
Answer: An average concentration.
●● A pH reading of 6.0 in raw water indicted the sample is.
Answer: Acid.
●● A pH value of 7.0 is considered to be.
Answer: Neutral.
●● A pneumatic ejector lifts water from low points to higher levels. The
device used to achieve this is a(n).
Answer: Air compressor.
●● A pump may be damaged if it is started with the discharge valve
closed, if the pump is a(n).
Answer: Positive-displacement pump.
●● A pump needs new packing
Answer: When gland follower is pulled all the way down.
EVALUATION TEST PAPER QUESTIONS
AND SOLUTIONS VERIFIED COMPLETE
●● A calm area within a settling basin necessary for suspended materials
to settle is the _____ zone.
Answer: Settling.
●● A centrifugal pump when operating normally shows a discharge
pressure of 100 psi and the venturi meter shows a flow rate of 20,000
gpm. Suddenly the pressure gauge drops to 90 psi and the flow rate
increases to 23,000 gpm. You would suspect
Answer: A large leak in the pump discharge line.
●● A chemical commonly used to raise PH is.
Answer: Lime.
●● A chlorine cylinder valve is thought to be leaking. If ammonia vapor
is passed near the valve. The presence of a leak would be indicated by.
Answer: White smoke.
●● A chlorine residual in water can be determined by using the regent.
Answer: Diethyl-p-phenylenediamine (DPD)
,●● A cylindrical tank with a radius of 5 ft and a height of 10 ft is filled
with water. If 3 lb of chemical is dissolved in the water, what is the
dosage?
Answer: 61 mg/L.
●● A cylindrical tank with a radius of 5 ft is filled to a depth of 10 ft
with water. Approximately how many gallons of water does it contain?
Answer: 5870 gal.
●● A flow of 1.55ft^3/s is______ gpm.
Answer: 696 gpm.
●● A grab sample represents.
Answer: The quality of the water at the time the sample was taken.
●● A heavy growth of algae in a surface water reservoir will have which
one of the following effects on the water?
Answer: Raise the pH.
●● A hypochlorinator is used to feed _______ into a water supply.
Answer: Hypochlorite solution.
, ●● A major cause of pump and motor shaft coupling wear is a.
Answer: Misalignment between pumps and motor flanges.
●● A number of grab sample test results that are averaged together
constitute
Answer: An average concentration.
●● A pH reading of 6.0 in raw water indicted the sample is.
Answer: Acid.
●● A pH value of 7.0 is considered to be.
Answer: Neutral.
●● A pneumatic ejector lifts water from low points to higher levels. The
device used to achieve this is a(n).
Answer: Air compressor.
●● A pump may be damaged if it is started with the discharge valve
closed, if the pump is a(n).
Answer: Positive-displacement pump.
●● A pump needs new packing
Answer: When gland follower is pulled all the way down.
