C53 TRADE- POOL CONTRACTOR
LICENSE 2025/2026 EXAM QUESTIONS
AND ANSWERS | 100% PASS
How do you calculate GPM for a pool pump? - 🧠ANSWER ✔✔Most pool
pump specifications are expressed in gallons per minute (GPM). So, to
convert from GPH (gallons per hour) to GPM, divide your GPH by 60
minutes - 2531 GPH / 60 = 42.2 GPM
ex: 14400 gallon pool turn over in 6 hours is: = 40 gpm
When establishing the elevation of a swimming pool bond beam on a
residential pool, which of the following must be considered? - 🧠ANSWER
✔✔Deck drainage and coping thickness
,Which of the following pipes is approved for underground gas lines? -
🧠ANSWER ✔✔Polyethylene pipe (thick yellow plastic piping weve used for
BBQ's)
why? Poly pipe has all of the advantages of Flex PVC, with greater
chemical and bacteria resistance, it doesn't attract hungry insects, and can
withstand some freezing or ground movement without breaking
what is bond beam in a pool ? - 🧠ANSWER ✔✔A bond beam is a thick
course of concrete that fills in the space along the top of the pool, all the
way around the perimeter. It creates a barrier between the pool and the
surrounding dirt
Joints for copper tubing may be - 🧠ANSWER ✔✔brazed, soldered, and
made with compression fittings.
If you overdig while excavating for a Fiberglas pool, what would be the best
backfill to use? - 🧠ANSWER ✔✔Concrete
how do you measure concrete? How many cubic yards of concrete will be
required for the 4" thick slab deck surrounding the spa shown below? -
🧠ANSWER ✔✔11.7 what is the formula
,What is the minimum height of a fence around a commercial swimming
pool - 🧠ANSWER ✔✔4 FT
Capacity formula - 🧠ANSWER ✔✔Pool volume(Cubic feet) x 7.48 = pool
capacity in gallons
First you'd need to figure out the pool volume, so simply plug these
numbers into the volume equation and multiply: 40 x 20 x 5 = 4,000 cubic
feet (pool volume).
What size high-rate sand filter is needed for a 30,000 gal swimming pool? -
🧠ANSWER ✔✔3.1 sqft
at least 1 square foot per 10,000 gallons pool capacity.
Which type of copper water pipe is best to use underground? - 🧠ANSWER
✔✔k
what is type k copper ? - 🧠ANSWER ✔✔Type K, soft copper tubing,
remains free from rusting and is highly resistant to corrosion and scale
formation. Type K has a heavy wall thickness for underground ser- vices
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
, from the water main to the house connection. It is conductive to enable
thawing and its flexibility allows it to conform to underground trenching.
If pool water has a low pH, what is a concern? - 🧠ANSWER ✔✔eye iritation
Aim for a pH level of between 7 and 7.6. If the water pH is higher than 8,
anyone who swims in the pool is at risk of skin rashes, while a pH of lower
than 7 can sting swimmers' eyes.
In fountains, all lighting fixtures must be installed for operation at _____ or
less between conductors. - 🧠ANSWER ✔✔150 volts
Chlorine should be added to a pool: - 🧠ANSWER ✔✔in the evening.
Since liquid chlorine will burn off quickly in direct sunlight, it's best to add it
to your pool in the evening.
What maximum slope is specified by the Building Code for a required
handicap ramp? - 🧠ANSWER ✔✔1:12 (8.3%)
Doubling the diameter of a pipe will produce: - 🧠ANSWER ✔✔4 times the
water flow capacity of the pipe.
LICENSE 2025/2026 EXAM QUESTIONS
AND ANSWERS | 100% PASS
How do you calculate GPM for a pool pump? - 🧠ANSWER ✔✔Most pool
pump specifications are expressed in gallons per minute (GPM). So, to
convert from GPH (gallons per hour) to GPM, divide your GPH by 60
minutes - 2531 GPH / 60 = 42.2 GPM
ex: 14400 gallon pool turn over in 6 hours is: = 40 gpm
When establishing the elevation of a swimming pool bond beam on a
residential pool, which of the following must be considered? - 🧠ANSWER
✔✔Deck drainage and coping thickness
,Which of the following pipes is approved for underground gas lines? -
🧠ANSWER ✔✔Polyethylene pipe (thick yellow plastic piping weve used for
BBQ's)
why? Poly pipe has all of the advantages of Flex PVC, with greater
chemical and bacteria resistance, it doesn't attract hungry insects, and can
withstand some freezing or ground movement without breaking
what is bond beam in a pool ? - 🧠ANSWER ✔✔A bond beam is a thick
course of concrete that fills in the space along the top of the pool, all the
way around the perimeter. It creates a barrier between the pool and the
surrounding dirt
Joints for copper tubing may be - 🧠ANSWER ✔✔brazed, soldered, and
made with compression fittings.
If you overdig while excavating for a Fiberglas pool, what would be the best
backfill to use? - 🧠ANSWER ✔✔Concrete
how do you measure concrete? How many cubic yards of concrete will be
required for the 4" thick slab deck surrounding the spa shown below? -
🧠ANSWER ✔✔11.7 what is the formula
,What is the minimum height of a fence around a commercial swimming
pool - 🧠ANSWER ✔✔4 FT
Capacity formula - 🧠ANSWER ✔✔Pool volume(Cubic feet) x 7.48 = pool
capacity in gallons
First you'd need to figure out the pool volume, so simply plug these
numbers into the volume equation and multiply: 40 x 20 x 5 = 4,000 cubic
feet (pool volume).
What size high-rate sand filter is needed for a 30,000 gal swimming pool? -
🧠ANSWER ✔✔3.1 sqft
at least 1 square foot per 10,000 gallons pool capacity.
Which type of copper water pipe is best to use underground? - 🧠ANSWER
✔✔k
what is type k copper ? - 🧠ANSWER ✔✔Type K, soft copper tubing,
remains free from rusting and is highly resistant to corrosion and scale
formation. Type K has a heavy wall thickness for underground ser- vices
3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
, from the water main to the house connection. It is conductive to enable
thawing and its flexibility allows it to conform to underground trenching.
If pool water has a low pH, what is a concern? - 🧠ANSWER ✔✔eye iritation
Aim for a pH level of between 7 and 7.6. If the water pH is higher than 8,
anyone who swims in the pool is at risk of skin rashes, while a pH of lower
than 7 can sting swimmers' eyes.
In fountains, all lighting fixtures must be installed for operation at _____ or
less between conductors. - 🧠ANSWER ✔✔150 volts
Chlorine should be added to a pool: - 🧠ANSWER ✔✔in the evening.
Since liquid chlorine will burn off quickly in direct sunlight, it's best to add it
to your pool in the evening.
What maximum slope is specified by the Building Code for a required
handicap ramp? - 🧠ANSWER ✔✔1:12 (8.3%)
Doubling the diameter of a pipe will produce: - 🧠ANSWER ✔✔4 times the
water flow capacity of the pipe.
