WFSM - Set B Exam UPDATED
QUESTIONS AND CORRECT ANSWERS
Which color band designates reverse osmosis water purification unit (ROWPU) piping that
carries raw water?
a. Yellow
b. Black
c. Green
d. Blue - CORRECT ANSWER b. Black
Which color band designates reverse osmosis water purification unit (ROWPU) piping that
carries filtered water?
a. Yellow.
b. Black.
c. Green.
d. Blue. - CORRECT ANSWER a. Yellow
Which color band designates reverse osmosis water purification unit (ROWPU) piping that
carries product water?
a. Yellow.
b. Black.
c. Green.
d. Blue. - CORRECT ANSWER d. Blue
How many gallons per hour (gph) does the 1500 reverse osmosis water purification unit
produce (on the average)?
a. 600.
b. 1,000.
c. 1,250.
d. 1,500. - CORRECT ANSWER d. 1,500
,How many hours per day is the reverse osmosis water purification unit (ROWPU) designed
to operate?
a. 24
b. 20
c. 12
d. 8 - CORRECT ANSWER b. 20
What is attached to the suction hose connected to the raw water pump that prevents the intake
of damaging objects?
a. Float.
b. Strainer.
c. Gate valve
d. Distribution pump. - CORRECT ANSWER b. Strainer.
What is an electrically driven centrifugal pump used to pump water from the product water
tanks to the end user?
a. Reverse osmosis (RO) pump
b. Chemical feed pump.
c. Distribution pump.
d. Raw water pump. - CORRECT ANSWER c. Distribution pump.
What is another term used to refer to the backwash water tank?
a. Raw water tank.
b. Product tank.
c. Filtered tank.
d. Brine tank. - CORRECT ANSWER d. Brine tank.
How many gallons of water does the backwash water tank hold?
a. 20,000.
,b. 15,000.
c. 10,000.
d. 5,000 - CORRECT ANSWER b. 20,000.
How many reverse osmosis (RO) elements are in each reverse osmosis water purification unit
(ROWPU) RO vessel?
a.1
b.2
с.3
d.4 - CORRECT ANSWER b.2
What is the first stage of purification in the reverse osmosis water purification unit (ROWPU)
process?
a. Bag filter.
b. Backwash filter.
c. Multimedia filtration.
d. Chemical disinfection - CORRECT ANSWER c. Multimedia filtration.
What is the fourth and final stage of treatment that completes the reverse osmosis water
purification unit (ROWPU) water treatment process?
a. Multimedia filtration.
b. Chemical disinfection
c. Bag filtration.
d. Desalination. - CORRECT ANSWER b. Chemical disinfection
Sodium hex is fed by the reverse osmosis water purification unit (ROWPU) chemical feed
pump at the
a. multimedia filter pump
b. multimedia filter influent.
c. reverse osmosis element pump
, d. reverse osmosis element influent. - CORRECT ANSWER b. multimedia filter
influent.
What chemical is fed to reduce scale and corrosion inside the pipe network of the reverse
osmosis water purification unit (ROWPU)?
a. Polymer.
b. Chlorine.
c. Citric acid.
d. Sodium hex. - CORRECT ANSWER d. Sodium hex.
How many drain valves are installed on the reverse osmosis water purification unit
(ROWPU)?
a.5
b.6
c.7
d.8 - CORRECT ANSWER c. 7
What is the maximum allowable total dissolved solids (TDS) level on the reverse osmosis
water purification unit (ROWPU)?
a. 850 parts per million (ppm)
b. 1,000 ppm.
c. 1,250 ppm.
d. 1,500 ppm. - CORRECT ANSWER b. 1,000 ppm.
What process lasts for 4 minutes and completes the backwash cycle?
a. Backwash.
b. Cleaning.
c. Rinsing.
d. Draining. - CORRECT ANSWER c. Rinsing.
QUESTIONS AND CORRECT ANSWERS
Which color band designates reverse osmosis water purification unit (ROWPU) piping that
carries raw water?
a. Yellow
b. Black
c. Green
d. Blue - CORRECT ANSWER b. Black
Which color band designates reverse osmosis water purification unit (ROWPU) piping that
carries filtered water?
a. Yellow.
b. Black.
c. Green.
d. Blue. - CORRECT ANSWER a. Yellow
Which color band designates reverse osmosis water purification unit (ROWPU) piping that
carries product water?
a. Yellow.
b. Black.
c. Green.
d. Blue. - CORRECT ANSWER d. Blue
How many gallons per hour (gph) does the 1500 reverse osmosis water purification unit
produce (on the average)?
a. 600.
b. 1,000.
c. 1,250.
d. 1,500. - CORRECT ANSWER d. 1,500
,How many hours per day is the reverse osmosis water purification unit (ROWPU) designed
to operate?
a. 24
b. 20
c. 12
d. 8 - CORRECT ANSWER b. 20
What is attached to the suction hose connected to the raw water pump that prevents the intake
of damaging objects?
a. Float.
b. Strainer.
c. Gate valve
d. Distribution pump. - CORRECT ANSWER b. Strainer.
What is an electrically driven centrifugal pump used to pump water from the product water
tanks to the end user?
a. Reverse osmosis (RO) pump
b. Chemical feed pump.
c. Distribution pump.
d. Raw water pump. - CORRECT ANSWER c. Distribution pump.
What is another term used to refer to the backwash water tank?
a. Raw water tank.
b. Product tank.
c. Filtered tank.
d. Brine tank. - CORRECT ANSWER d. Brine tank.
How many gallons of water does the backwash water tank hold?
a. 20,000.
,b. 15,000.
c. 10,000.
d. 5,000 - CORRECT ANSWER b. 20,000.
How many reverse osmosis (RO) elements are in each reverse osmosis water purification unit
(ROWPU) RO vessel?
a.1
b.2
с.3
d.4 - CORRECT ANSWER b.2
What is the first stage of purification in the reverse osmosis water purification unit (ROWPU)
process?
a. Bag filter.
b. Backwash filter.
c. Multimedia filtration.
d. Chemical disinfection - CORRECT ANSWER c. Multimedia filtration.
What is the fourth and final stage of treatment that completes the reverse osmosis water
purification unit (ROWPU) water treatment process?
a. Multimedia filtration.
b. Chemical disinfection
c. Bag filtration.
d. Desalination. - CORRECT ANSWER b. Chemical disinfection
Sodium hex is fed by the reverse osmosis water purification unit (ROWPU) chemical feed
pump at the
a. multimedia filter pump
b. multimedia filter influent.
c. reverse osmosis element pump
, d. reverse osmosis element influent. - CORRECT ANSWER b. multimedia filter
influent.
What chemical is fed to reduce scale and corrosion inside the pipe network of the reverse
osmosis water purification unit (ROWPU)?
a. Polymer.
b. Chlorine.
c. Citric acid.
d. Sodium hex. - CORRECT ANSWER d. Sodium hex.
How many drain valves are installed on the reverse osmosis water purification unit
(ROWPU)?
a.5
b.6
c.7
d.8 - CORRECT ANSWER c. 7
What is the maximum allowable total dissolved solids (TDS) level on the reverse osmosis
water purification unit (ROWPU)?
a. 850 parts per million (ppm)
b. 1,000 ppm.
c. 1,250 ppm.
d. 1,500 ppm. - CORRECT ANSWER b. 1,000 ppm.
What process lasts for 4 minutes and completes the backwash cycle?
a. Backwash.
b. Cleaning.
c. Rinsing.
d. Draining. - CORRECT ANSWER c. Rinsing.
