CPO Practice Test Questions & Answers – 2025 Update
Top Verified Solution
1. A valve has a vertical disc or wedge attached to a long threaded stem that when rotated either seals
or unblocks the flow of water. - ANS ✔ - gate
2. According to the Certified Pool - Spa Operator Handbook, cyanuric acid levels shall not exceed local
health codes. In many cases the limit is ppm. - ANS ✔ - 100 ppm
3. What is the name of the area of a centrifugal pump that converts water energy from velocity to
pressure? - ANS ✔ - volute
4. How much sodium bicarbonate should be added to a 2,000 gallon spa to increase the total alkalinity
by 14ppm? - ANS ✔ - 6.27 oz
5. Pools of similar surface area located in the same geographical region, but with differing water
depths will have the same . - ANS ✔ - surface heat loss
6. According to The Certified Pool - Spa Operator Handbook, pressure head is calculated by
multiplying the psi by . - ANS ✔ - 2.31
7. 1 pound per square inch (psi) is the pressure created by a column of water feet high. - ANS ✔ - 2.31
8. In a pool containing 35,000 gallons which is 15 x 40 ft with the temp of 65 degrees F, BTU's would
be required to raise the water temperature to 75 degrees F if the air temp is 65 degrees F. - ANS ✔ -
2,915,500
9. To raise FC in a 20,000 gallon pool by 2.0 ppm would require ounces of calcium hypochlorite. - ANS
✔-8
10. A _________ is used to radiate the high temperature of the water and cool it enough to allow the
remainder of the circulation piping to the PVC. - ANS ✔ - Heat sink
, CPO Practice Test Questions & Answers – 2025 Update
Top Verified Solution
11. You are the CPO for a 100 foot long, 50 foot wide country club pool. The average depth of this pool
is 7 feet. You return to the pool on Monday morning, after a rare weekend off, and find that the auto-
fill feature has failed to work, and the pool water level is four inches too low. How many gallons of
water must be added to return the water to the proper level? - ANS ✔ - 12,495 gallons
12. You are the operator of a 3,000 gallon health club spa, which has an average of 100 users per day.
According to the CPO Handbook, how often should the water in this spa be changed? - ANS ✔ - 10
days
"13. You are the CPO for a large municipal swimming pool. This pool has a volume of 560,000 gallons
of water,and has an average daily bather load of 1300 people. The pool is operated using high rate
pressure sand filters. How often should you backwash the filters?" - ANS ✔ - When the influent and
effluent gauges are 10 to 20 psi apart
14. In testing for Chlorine/Bromine in a commercial pool, DPD is preferred over OTO because: - ANS
✔ - OTO only tests for Total Chlorine
15. Safety and rescue equipment should always be: - ANS ✔ - Kept easily accessible around the pool
16. Which type of filter system will remove the smallest micron particles? - ANS ✔ - diatomaceous
earth
17. If the pump fails to prime, which of the following does not have to be checked? - ANS ✔ - filter
system pressure is too high
18. Oxidation Reduction Potential testing (ORP) is measured in? - ANS ✔ - mV
19. High calcium hardness can result in what condition? - ANS ✔ - cloudy water
20. Head first entry dives are: - ANS ✔ - only allowed in areas of the pool that are not marked as 'NO
DIVING'
Top Verified Solution
1. A valve has a vertical disc or wedge attached to a long threaded stem that when rotated either seals
or unblocks the flow of water. - ANS ✔ - gate
2. According to the Certified Pool - Spa Operator Handbook, cyanuric acid levels shall not exceed local
health codes. In many cases the limit is ppm. - ANS ✔ - 100 ppm
3. What is the name of the area of a centrifugal pump that converts water energy from velocity to
pressure? - ANS ✔ - volute
4. How much sodium bicarbonate should be added to a 2,000 gallon spa to increase the total alkalinity
by 14ppm? - ANS ✔ - 6.27 oz
5. Pools of similar surface area located in the same geographical region, but with differing water
depths will have the same . - ANS ✔ - surface heat loss
6. According to The Certified Pool - Spa Operator Handbook, pressure head is calculated by
multiplying the psi by . - ANS ✔ - 2.31
7. 1 pound per square inch (psi) is the pressure created by a column of water feet high. - ANS ✔ - 2.31
8. In a pool containing 35,000 gallons which is 15 x 40 ft with the temp of 65 degrees F, BTU's would
be required to raise the water temperature to 75 degrees F if the air temp is 65 degrees F. - ANS ✔ -
2,915,500
9. To raise FC in a 20,000 gallon pool by 2.0 ppm would require ounces of calcium hypochlorite. - ANS
✔-8
10. A _________ is used to radiate the high temperature of the water and cool it enough to allow the
remainder of the circulation piping to the PVC. - ANS ✔ - Heat sink
, CPO Practice Test Questions & Answers – 2025 Update
Top Verified Solution
11. You are the CPO for a 100 foot long, 50 foot wide country club pool. The average depth of this pool
is 7 feet. You return to the pool on Monday morning, after a rare weekend off, and find that the auto-
fill feature has failed to work, and the pool water level is four inches too low. How many gallons of
water must be added to return the water to the proper level? - ANS ✔ - 12,495 gallons
12. You are the operator of a 3,000 gallon health club spa, which has an average of 100 users per day.
According to the CPO Handbook, how often should the water in this spa be changed? - ANS ✔ - 10
days
"13. You are the CPO for a large municipal swimming pool. This pool has a volume of 560,000 gallons
of water,and has an average daily bather load of 1300 people. The pool is operated using high rate
pressure sand filters. How often should you backwash the filters?" - ANS ✔ - When the influent and
effluent gauges are 10 to 20 psi apart
14. In testing for Chlorine/Bromine in a commercial pool, DPD is preferred over OTO because: - ANS
✔ - OTO only tests for Total Chlorine
15. Safety and rescue equipment should always be: - ANS ✔ - Kept easily accessible around the pool
16. Which type of filter system will remove the smallest micron particles? - ANS ✔ - diatomaceous
earth
17. If the pump fails to prime, which of the following does not have to be checked? - ANS ✔ - filter
system pressure is too high
18. Oxidation Reduction Potential testing (ORP) is measured in? - ANS ✔ - mV
19. High calcium hardness can result in what condition? - ANS ✔ - cloudy water
20. Head first entry dives are: - ANS ✔ - only allowed in areas of the pool that are not marked as 'NO
DIVING'
