Residential Swimming Pool Trade
Knowledge Revision Questions and
Answers 2026/2027
A round spa with a 12' inside diameter is to be installed. The site elevation prior
to excavation for the spa is 0.00'. The pool shell is to be excavated to allow for a
6" clearance from the 4" thick spa walls and flat bottom slab. Finished inside
depth of the spa is to be 3'. The total depth of excavation for the spa shell is
____________. Select the closest answer. - correct answer-3'10"
Portable abrasive wheels used for external grinding shall be provided with safety
guards unless they are ___________ or less in diameter and securely mounted on
the end of a steel mandrel. - correct answer-2"
Backwashing of a sand filter is required when the influent water and the effluent
water reaches ___________according to the POOL SPA OPERATOR HANDBOOK. -
correct answer-10 to 20 psi
The design collapse pressure of a vacuum service filter tank shall be at
leas______times the pressure developed by the water in the tank. - correct
answer-1.5
, What can only happen with a dry mix hose when applying shotcrete? - correct
answer-Static electricity buildup
All these materials, except_______ are considered to have acceptable corrosion
resistance for general swimming pool and spa/hot tub equipment applications
and are not required to have a protective coating. - correct answer-ferrous alloys
containing 58% copper
The NATIONAL ELECTRIC CODE requires that the heating elements in electrical
pool water heaters shall be subdivided into loads not exceeding ________
amperes. - correct answer-48
According to the CONCRETE MASONRY HANDBOOK, ________ greatly improves
the pumpability of plaster. - correct answer-Well-graded aggregate
According to PLACING REINFORCING BARS, the recommended minimum cover (or
protection) for #6 reinforcing bars in concrete walls, which are in contact with the
ground, is_______. - correct answer-2" from outside of bar to face of concrete
According to RESIDENTIAL INGROUND SWIMMING POOLS, the slope of the deep
area floor shall not exceed 1 foot of fall in________feet horizontally. - correct
answer-3
When chlorine gas is dissolved in water _________is formed. - correct answer-
Hypochlorous acid
The diameter of #5 reinforcing steel is____. - correct answer-5/8"
Knowledge Revision Questions and
Answers 2026/2027
A round spa with a 12' inside diameter is to be installed. The site elevation prior
to excavation for the spa is 0.00'. The pool shell is to be excavated to allow for a
6" clearance from the 4" thick spa walls and flat bottom slab. Finished inside
depth of the spa is to be 3'. The total depth of excavation for the spa shell is
____________. Select the closest answer. - correct answer-3'10"
Portable abrasive wheels used for external grinding shall be provided with safety
guards unless they are ___________ or less in diameter and securely mounted on
the end of a steel mandrel. - correct answer-2"
Backwashing of a sand filter is required when the influent water and the effluent
water reaches ___________according to the POOL SPA OPERATOR HANDBOOK. -
correct answer-10 to 20 psi
The design collapse pressure of a vacuum service filter tank shall be at
leas______times the pressure developed by the water in the tank. - correct
answer-1.5
, What can only happen with a dry mix hose when applying shotcrete? - correct
answer-Static electricity buildup
All these materials, except_______ are considered to have acceptable corrosion
resistance for general swimming pool and spa/hot tub equipment applications
and are not required to have a protective coating. - correct answer-ferrous alloys
containing 58% copper
The NATIONAL ELECTRIC CODE requires that the heating elements in electrical
pool water heaters shall be subdivided into loads not exceeding ________
amperes. - correct answer-48
According to the CONCRETE MASONRY HANDBOOK, ________ greatly improves
the pumpability of plaster. - correct answer-Well-graded aggregate
According to PLACING REINFORCING BARS, the recommended minimum cover (or
protection) for #6 reinforcing bars in concrete walls, which are in contact with the
ground, is_______. - correct answer-2" from outside of bar to face of concrete
According to RESIDENTIAL INGROUND SWIMMING POOLS, the slope of the deep
area floor shall not exceed 1 foot of fall in________feet horizontally. - correct
answer-3
When chlorine gas is dissolved in water _________is formed. - correct answer-
Hypochlorous acid
The diameter of #5 reinforcing steel is____. - correct answer-5/8"
