Mississippi Swimming Pools Examination

Turnover period is best defined as the time required to:

• APass a volume of water equal to the entire pool capacity through the circulation and filt…
• BRaise the free-chlorine residual from zero to the ideal range
• CBackwash a high-rate sand filter until the sight glass runs clear
• DHeat the pool 10°F using the installed heater

A public pool holds 36,000 gallons and must turn over in 6 hours. What minimum circulation flow is required?

• A60 gpm
• B80 gpm
• C100 gpm
• D120 gpm

A circulation pump delivers 80 gpm. If the high-rate sand filter is sized at 20 gpm per square foot of media, what minimum filter area is required?

• A2 sq ft
• B4 sq ft
• C8 sq ft
• D16 sq ft

Circulation-system components such as filters, pumps, and chemical feeders for public pools shall comply with which standard in effect at the time of manufacture?

• ANSF/ANSI/CAN 50
• BASTM C94
• CACI 318
• DUL 508A

Per ANSI/NSPI-1 2014, the maximum water velocity in suction piping (other than copper) shall not exceed:

• A4 ft per second
• B6 ft per second
• C8 ft per second
• D10 ft per second

On a pressure-filter circulation system, the cleanable hair-and-lint strainer is installed:

• AOn the suction line, upstream of the circulation pump
• BOn the return line, downstream of the heater
• CInside the filter tank above the laterals
• DOn the waste line after the backwash valve

ANSI/NSPI-1 2014 requires at least one return inlet for each:

• A100 sq ft of pool surface, or fraction thereof
• B300 sq ft of pool surface, or fraction thereof
• C500 sq ft of pool surface, or fraction thereof
• D1,000 sq ft of pool surface, or fraction thereof

When automatic surface skimmers are the sole overflow system, ANSI/NSPI-1 2014 requires at least one skimmer for each:

• A200 sq ft of water surface
• B300 sq ft of water surface
• C500 sq ft of water surface
• D800 sq ft of water surface

A Class B public pool has an average depth of 5 ft. Under ANSI/NSPI-1 2014 Table 8.1.1, what is the maximum permitted turnover period?

• A5 hours
• B6 hours
• C7.5 hours
• D8 hours

On a sand-filter multiport valve, which setting sends water backward through the media and out the waste line?

• AFilter
• BRinse
• CBackwash
• DRecirculate

ANSI/NSPI-1 2014 requires circulation piping that is not integral to the pool to be hydrostatically tested at:

• A15 psi for 1 hour after the deck is poured
• B25 psi for 24 hours, before the deck is poured, with pressure held through construction
• C50 psi for 10 minutes at the equipment pad only
• D100 psi for 24 hours after plaster

A diatomaceous-earth filter must handle 60 gpm at a design rate of 2 gpm per square foot. What minimum filter area is required?

• A12 sq ft
• B20 sq ft
• C30 sq ft
• D60 sq ft

When a perimeter overflow (gutter) is the sole surface-skimming system, ANSI/NSPI-1 2014 requires a surge capacity of not less than:

• A0.25 gallon per square foot of pool surface
• B1 gallon per square foot of pool surface
• C5 gallons per linear foot of gutter
• D10 percent of the pool volume

If a suction-outlet cover or grate is missing, broken, or loose, the circulation pump shall be:

• ALeft running so the pool stays filtered until a replacement arrives
• BThrottled at the discharge valve to cut flow below 1.5 fps
• CShut down immediately and kept off until a proper cover is installed
• DSwitched to recirculate so water bypasses the main drain

When a dedicated vacuum fitting is installed in the pool wall, ANSI/NSPI-1 2014 locates it:

• AAt the waterline, flush with the tile
• BAt least 6 in. and not more than 18 in. below the water level
• COn the floor within 3 ft of the main drain
• DNot less than 24 in. below the water level

A public spa holds 600 gallons and is designed for a 30-minute turnover. What minimum circulation flow is required?

• A10 gpm
• B15 gpm
• C20 gpm
• D30 gpm

ANSI/NSPI-1 2014 requires circulation plastic pipe to be at least which schedule and listing?

• ASchedule 20 PVC listed to ASTM D1785 only
• BSchedule 40 PVC complying with NSF/ANSI 14
• CSchedule 80 CPVC with no NSF listing
• DFlexible polyethylene irrigation tubing

The floating weir in an automatic skimmer is installed so that it:

• ACreates a thin, high-velocity surface layer that draws floating debris into the basket
• BSeals the skimmer completely when the pump is off to hold prime
• CMeters sanitizer tablets placed in the basket
• DEqualizes suction between the main drain and the vacuum line

Class A, B, C, and F public pools shall be equipped with which set of operating instruments?

• AA thermometer on the heater only
• BA pump suction (vacuum) gauge, filter inlet pressure gauge, filter outlet gauge, and a fl…
• CA pH probe and ORP controller only
• DA multiport-valve position indicator only

A rectangular public pool is 40 ft long, 20 ft wide, and averages 5 ft deep. Using 7.5 gal/cu ft, what flow is required for a 6-hour turnover?

• A50 gpm
• B67 gpm
• C83 gpm
• D100 gpm

A Class F wading pool must have which circulation arrangement under ANSI/NSPI-1 2014?

• AA shared filter with the main pool and a 6-hour turnover
• BAn independent circulation system, physical separation from the main pool, and a 1-hour t…
• CSkimmers only, with no dedicated pump
• DA 30-minute spa turnover piped through the main-pool heater

Backwashing a high-rate sand filter is performed to:

• AReverse flow through the media so trapped dirt is lifted and discharged to waste
• BAdd fresh sand without opening the tank
• CPrime the pump after a strainer cleaning
• DBypass the filter so the heater can run

If a skimmer equalizer line is used, the pool-wall opening shall be protected by:

• AA rubber plug installed after start-up
• BA listed suction-outlet cover or grate complying with ANSI/APSP-16
• CA ball valve left half open
• DA leaf-trap basket only

ANSI/NSPI-1 2014 requires pool-water pH to be maintained between:

• A6.8 and 7.2
• B7.2 and 7.8
• C7.8 and 8.4
• D8.0 and 8.8

The ideal pH range given in ANSI/NSPI-1 2014 Appendix A is:

• A7.0–7.2
• B7.4–7.6
• C7.8–8.0
• D8.2–8.4

For a public swimming pool using chlorine, ANSI/NSPI-1 2014 Appendix A lists the minimum free-chlorine residual as:

• A0.4 ppm
• B1.0 ppm
• C3.0 ppm
• D5.0 ppm

ANSI/NSPI-1 2014 Appendix A sets the maximum combined-chlorine residual for public pools at:

• A0.2 ppm
• B1.0 ppm
• C2.0 ppm
• D4.0 ppm

Combined chlorine measures 0.7 ppm. To reach breakpoint per ANSI/NSPI-1 2014 Appendix A, free chlorine must be raised to at least:

• A1.4 ppm
• B3.5 ppm
• C7.0 ppm
• D10.0 ppm

When cyanuric acid is used, ANSI/NSPI-1 2014 Appendix A lists the ideal range and the maximum as:

• A5–15 ppm ideal, 25 ppm maximum
• B30–50 ppm ideal, 100 ppm maximum
• C80–120 ppm ideal, 200 ppm maximum
• D150–200 ppm ideal, 300 ppm maximum

Total alkalinity is maintained primarily because it:

• AKills bacteria in place of free chlorine
• BBuffers pH so the reading does not bounce with every chemical addition
• CStains plaster a uniform white
• DRemoves combined chlorine without oxidation

When the sanitizer is calcium hypochlorite or sodium hypochlorite, Appendix A lists the ideal total-alkalinity range as:

• A40–60 ppm
• B80–100 ppm
• C140–180 ppm
• D200–250 ppm

For public and residential pools, Appendix A lists the ideal calcium-hardness range as:

• A50–100 ppm
• B200–400 ppm
• C600–800 ppm
• D1,200–1,500 ppm

ANSI/NSPI-1 2014 Appendix A lists the acceptable Langelier Saturation Index (LSI) range as:

• A−1.5 to −1.0
• B−0.3 to +0.5
• C+0.8 to +1.2
• D+1.5 to +2.0

If pool pH is held above 7.8, the most likely operating problems are:

• ARapid sanitizer loss, plaster etching, and metal corrosion
• BReduced chlorine efficacy, scale formation, cloudy water, and eye discomfort
• CVinyl-liner wrinkling and pH bounce
• DImmediate breakpoint without added chlorine

Free available chlorine in a public pool shall be measured with a method that is not affected by chloramines. The common field method is:

• AOT (orthotolidine) yellow-color test
• BDPD free-chlorine test
• CPhenol red pH tablet in the same vial
• DA copper test strip

Cyanuric acid stabilizer is not recommended for which application?

• AOutdoor residential pools in full sun
• BIndoor pools or spas, where sunlight protection is not needed
• COutdoor public pools that use chlorine
• DAny pool that also uses a sand filter

How many pounds of 65 percent calcium hypochlorite are needed to raise free chlorine 2 ppm in a 25,000-gallon pool? Use pounds = (gallons × ppm × 8.34) ÷ (1,000,000 × decimal strength).

• A0.32 lb
• B0.64 lb
• C1.28 lb
• D2.50 lb

Which set of symptoms most clearly indicates a need for superchlorination on a chlorine-sanitized pool?

• AHigh pH, high alkalinity, and a slightly positive LSI
• BCloudy water, slime, musty odor, algae, and trouble holding a sanitizer residual
• CLow calcium hardness and a new plaster surface
• DA clean filter and a 6-hour turnover

When visible algae appears, Appendix A recommends superchlorination (if chlorine is used) plus:

• ADraining the pool to the waste line with no other action
• BAn EPA-registered algicide used per label, with brushing and vacuuming
• CAdding cyanuric acid to 150 ppm
• DTurning the pump off for 24 hours so chemicals can sit

A pool sanitized with PHMB (polyhexamethylene biguanide) must not be oxidized with:

• AHydrogen peroxide, the compatible PHMB oxidizer
• BChlorine, bromine, or potassium monopersulfate
• CA cartridge-filter cleaning
• DFresh makeup water

The Consumer Product Safety Commission and ANSI/NSPI spa standards set the maximum spa water temperature at:

• A96°F (36°C)
• B100°F (38°C)
• C104°F (40°C)
• D110°F (43°C)

A circular spa is 10 ft in diameter and 3.5 ft deep. Using gallons = 3.14 × r² × depth × 7.5, the water volume is closest to:

• A1,030 gallons
• B2,060 gallons
• C2,750 gallons
• D4,120 gallons

In a freezing climate, the most complete equipment-protection step during winterization is to:

• ALeave the filter full of water so the tank cannot collapse
• BDrain the pump, filter, heater, and exposed face piping, and provide freeze protection fo…
• CRun the pump continuously on low speed with no other changes
• DAdd extra cyanuric acid in place of draining

The Mississippi Swimming Pools contractor classification does not include which of the following?

• AInstallation of perimeter piping and filter piping
• BInstallation of package pool heaters
• CDirect connections to a sanitary sewer or to potable water lines, or electrical work
• DInterior finishes and replacement of existing pool equipment

Which heating method is excluded from the Mississippi Swimming Pools classification?

• APackage gas-fired pool heaters
• BElectric resistance pool heaters
• CSolar pool heating
• DAir-source heat-pump pool heaters

Under the MSBOC Swimming Pools scope, installation of a factory package pool heater is:

• AInside the classification, along with perimeter and filter piping
• BAlways a mechanical-contractor-only item
• CProhibited because all heaters are treated as solar equipment
• DAllowed only on public pools, not residential spas

A gas-fired pool heater installed on a public pool shall comply with which appliance standard cited by ANSI/NSPI-1 2014?

• AANSI Z21.56 / CSA 4.7
• BASTM F1346
• CACI 506.2
• DNSF/ANSI 14 only