Pool Contractor License Exam
Comprehensive Resource To Help You Ace 2026-2027
Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
Instant Download Pdf
1. Elemental Chlorine aka Gas Chlorine - Correct Answer: It is stored in a
pressure tank and fed into the recirculation system via an automatic feeder.
Gas chlorine is the cheapest way to chlorinate a pool. IT IS ALSO THE MOST
DANGERIOUS, AND REQUIRES SPECIAL EQUIPMENT. THIS IS NOT
RECOMMENDED FOR RESIDENTIAL USE. Chlorine gas has a pH of 0-1 and
has 100% available chlorine.
2. Sodium hypochlorite aka liquid chlorine - Correct Answer: Commonly
known as "liquid chlorine" or bleach, sodium hypochlorite is widely used in
both commercial and residential swimming pools. Sodium hypochlorite
effectively destroys bacteria and prevents algae in swimming pools.
3. Calcium Hypochlorite aka Cal Hypo - Correct Answer: Proactive shocking
with calcium hypochlorite will help ensure your pool is well defended
against algae, bacteria, and other contaminants
,4. Lithium hypochlorite - Correct Answer: Lithium Hypochlorite is a white,
granular solid or tablet with a Chlorine odor. It is used for sanitizing,
disinfecting and controlling algae in swimming pools, and as laundry bleach.
5. Chlorinated Isocyanurate - Correct Answer: Chlorinated isocyanurates
are chlorine-containing derivatives of isocyanuric acid and are used as
sanitizing, disinfecting and bleaching agents.
6. Bromine - Correct Answer: is a more active chlorine in destroying
ammonia in pool water. Causes less eye irritation than chlorine.
7. there is also Elemental bromine and organic bromine. but they are not
often used because they dissipate rapidly. more than chlorine
8. Iodine - Correct Answer: combined with another element like potassium
and an activating agent like hypochlorite in order to dissolve.
9. iodine is not effective against algae, it causes almost no eye irritation and
remains active longer than chlorine. it can turn pool water green and
residual tests are done with difficulty.
10.How to treat Algae in pool water - Correct Answer: Use a pool brush to
vigorously scrub any pool surfaces covered in algae, including the walls,
floors and steps. Apply a green algaecide according to the directions on the
label. Let the water circulate for 24 hours, then brush the pool surfaces
again. Vacuum or backwash to remove any remaining dead algae.
,11.How to treat colored pool water - Correct Answer: Shock the pool with
chlorine.
Brush away the algae, paying close attention to colonies that are lurking in
corners and crevices.
Backwash the filter.
Clarify the water.
12.How to treat Stains in pool - Correct Answer: The fastest way to get rid
of these stains is to apply chlorine straight onto the discoloration. Scrub
with a brush and watch it disappear. Run a water test to see what other
stuff might be in the water, and treat accordingly.
13.How to treat Scale in pool aka calicum carbonate scaling - Correct
Answer: How to Remove Calcium Carbonate Scaling From Your Pool. If your
pool has calcium carbonate deposits, you can remove them with a pumice
stone, stain eraser or scale remover. A pumice stone should only be used on
hard surfaces, such as tile and concrete. Simply use the stone to scrub the
deposits.
14.What is Corrosion - Correct Answer: Corrosion is a process of dissolving
or wearing away a material, chiefly a metal. It can result from an excessive
acidity, incorrect use of acid treatments, oxidation, or electrolysis
15.What is Electrolysis - Correct Answer: Electrolysis is caused by the
creation of a minute electrical current that arises when two dissimilar
metals come into contact in presence of chemically treated water. it
corrodes active metals such as iron, and it can produce rusts spots as well.
, 16.Ohm's Law - Correct Answer: I = intensity of current in amps
E = electromotive force in volts
R = Resistance in ohms
17.ex: E=R x I
18.Watt's Law - Correct Answer: P = Power in Watts
I = Intensity of current in amps
E = electromotive force of volts
Ex: P=IxE
19.Types of interior finishes in a pool - Correct Answer: Plaster aka white
coat. typically last from 10-15 years. usually carries a 1-year warranty. best
for getting the blue-colored pool
20.Quartz - quartz rock and white cement. comes in a lot of different colors.
usually carries a 5-year warranty. lasts 7-12 years
21.Pebble tec - tumbled rock, slightly larger than quartz. smoothed of any
sharp edges. usually carries a five-year warranty. lasts typically 20 years.
22.how to calculate Surface Area - Correct Answer: Formula example: 33ft
long x 18ft Wide = 594 SqFt
Comprehensive Resource To Help You Ace 2026-2027
Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
Instant Download Pdf
1. Elemental Chlorine aka Gas Chlorine - Correct Answer: It is stored in a
pressure tank and fed into the recirculation system via an automatic feeder.
Gas chlorine is the cheapest way to chlorinate a pool. IT IS ALSO THE MOST
DANGERIOUS, AND REQUIRES SPECIAL EQUIPMENT. THIS IS NOT
RECOMMENDED FOR RESIDENTIAL USE. Chlorine gas has a pH of 0-1 and
has 100% available chlorine.
2. Sodium hypochlorite aka liquid chlorine - Correct Answer: Commonly
known as "liquid chlorine" or bleach, sodium hypochlorite is widely used in
both commercial and residential swimming pools. Sodium hypochlorite
effectively destroys bacteria and prevents algae in swimming pools.
3. Calcium Hypochlorite aka Cal Hypo - Correct Answer: Proactive shocking
with calcium hypochlorite will help ensure your pool is well defended
against algae, bacteria, and other contaminants
,4. Lithium hypochlorite - Correct Answer: Lithium Hypochlorite is a white,
granular solid or tablet with a Chlorine odor. It is used for sanitizing,
disinfecting and controlling algae in swimming pools, and as laundry bleach.
5. Chlorinated Isocyanurate - Correct Answer: Chlorinated isocyanurates
are chlorine-containing derivatives of isocyanuric acid and are used as
sanitizing, disinfecting and bleaching agents.
6. Bromine - Correct Answer: is a more active chlorine in destroying
ammonia in pool water. Causes less eye irritation than chlorine.
7. there is also Elemental bromine and organic bromine. but they are not
often used because they dissipate rapidly. more than chlorine
8. Iodine - Correct Answer: combined with another element like potassium
and an activating agent like hypochlorite in order to dissolve.
9. iodine is not effective against algae, it causes almost no eye irritation and
remains active longer than chlorine. it can turn pool water green and
residual tests are done with difficulty.
10.How to treat Algae in pool water - Correct Answer: Use a pool brush to
vigorously scrub any pool surfaces covered in algae, including the walls,
floors and steps. Apply a green algaecide according to the directions on the
label. Let the water circulate for 24 hours, then brush the pool surfaces
again. Vacuum or backwash to remove any remaining dead algae.
,11.How to treat colored pool water - Correct Answer: Shock the pool with
chlorine.
Brush away the algae, paying close attention to colonies that are lurking in
corners and crevices.
Backwash the filter.
Clarify the water.
12.How to treat Stains in pool - Correct Answer: The fastest way to get rid
of these stains is to apply chlorine straight onto the discoloration. Scrub
with a brush and watch it disappear. Run a water test to see what other
stuff might be in the water, and treat accordingly.
13.How to treat Scale in pool aka calicum carbonate scaling - Correct
Answer: How to Remove Calcium Carbonate Scaling From Your Pool. If your
pool has calcium carbonate deposits, you can remove them with a pumice
stone, stain eraser or scale remover. A pumice stone should only be used on
hard surfaces, such as tile and concrete. Simply use the stone to scrub the
deposits.
14.What is Corrosion - Correct Answer: Corrosion is a process of dissolving
or wearing away a material, chiefly a metal. It can result from an excessive
acidity, incorrect use of acid treatments, oxidation, or electrolysis
15.What is Electrolysis - Correct Answer: Electrolysis is caused by the
creation of a minute electrical current that arises when two dissimilar
metals come into contact in presence of chemically treated water. it
corrodes active metals such as iron, and it can produce rusts spots as well.
, 16.Ohm's Law - Correct Answer: I = intensity of current in amps
E = electromotive force in volts
R = Resistance in ohms
17.ex: E=R x I
18.Watt's Law - Correct Answer: P = Power in Watts
I = Intensity of current in amps
E = electromotive force of volts
Ex: P=IxE
19.Types of interior finishes in a pool - Correct Answer: Plaster aka white
coat. typically last from 10-15 years. usually carries a 1-year warranty. best
for getting the blue-colored pool
20.Quartz - quartz rock and white cement. comes in a lot of different colors.
usually carries a 5-year warranty. lasts 7-12 years
21.Pebble tec - tumbled rock, slightly larger than quartz. smoothed of any
sharp edges. usually carries a five-year warranty. lasts typically 20 years.
22.how to calculate Surface Area - Correct Answer: Formula example: 33ft
long x 18ft Wide = 594 SqFt
