1 Exam Prep State Pool Contractor Feedback Questions and Answers

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1 1 Exam Prep State Pool Contractor Feedback Questions and Answers 1. What valves are not part of the pool recirculation system? a. Rotary Valve b. Butterfly Valve c. Ball valves d. Hydrostatic Valves 2. Given the minimum wattage required, how many 200 watt underwater lights are required in a 20 X 40 outdoor pool? a. Two b. Three c. Four d. Five 3. What is the contact wood area that is necessary to form & pour concrete wall 6 high, 25 long and 8 thick? a. 288 sq ft b. 296 sq ft c. 144 sq ft d. 148 sq ft 4. How many board feet of wood would be required to build a partition wall that measures 8 high x 25 long and is 4 thick with one 2x4 sole plate but a double plate at the top? Assume studs placed a 18 O.C. a. 12 board feet b Board Feet c Board Feet d. 62 Board Feet 5. In preparation for a shotcrete application, wire reinforcement should be placed so that it is running in both directions and spaced apart. a. 2 b. 4 c. 6 d Among the duties of a shotcrete pump operator is to a. Proportion the mixing of the materials b. Dragging the hose into place c. Monitor water content by observing the slump d. Scheduling & logistics 1 Exam Prep State Swimming Pool Contractor Feedback -1 1

2 7. What is the term for quickly opening & closing a welding tank s valve to clean out debris? a. Blowing b. Cracking c. Shooting d. Cleaning 8. What is a measure of the water clarity level? a. 20/20 b. NTUs c. BTUs d. Filter media size 9. Given the following, what should the vacuum gauge reading on this system if the TDH is 60 feet of head and the pressure gauge reads 25 psi? a. 2.0 b c d What should you do when you change a chlorine gas cylinder? a. Test the CL 2 levels. b. Evacuate a 1/4 mile radius. c. Change the seal. d. Put on scuba gear. 11. How many gallons are in the following L shaped pool? The long side of the pool is 20 feet wide, 40 feet long with an average depth of 3.5 feet. The short side of the L is 20 feet long and 20 feet wide with an average depth of 8 feet. a. 35,000 b. 39,000 c. 44,880 d. 45, Shotcrete will lose slump during pumping. Entrained air is also lost if the concrete free falls in the pump system. The loss depends on which of the following: a. Length of line b. Type of pump c. Initial level of air content 1 Exam Prep State Swimming Pool Contractor Feedback -1 2

3 13. You are operating a swimming pool with a flow rate of 744 gallons per minute. Calculate the minimum size of cartridge filter for a 2 pump system. a. 1,984 b. 992 c. 3,968 d. 1, Which is a requirement for testing water in a commercial swimming pool? a. Must use a blue taylor test kit. b. Must take water sample from 2 locations on pools larger than 500,000 gallons. c. DPD must be used for chlorine measurements. d. None of the above. 15. To assist the pool operator in performing the daily maintenance requirements, all circulation components should be. a. Labeled b. Tagged c. Color coded 16. Which wire tie is normally used when tying wall reinforcement? a. Saddle or U ties b. Wrap and snap c. Single ties d. Wrap and saddle ties 17. In the dry mix process, adding water to the aggregate before mixing to bring its moisture content to about 3-6% is called. a. prewetting b. predampening c. setting d. slumping 18. What is the maximum recommended spacing of anchors for most vertical applications? a. 36 b. 36 on centers c. 24 on centers d. 36 minimum 1 Exam Prep State Swimming Pool Contractor Feedback -1 3

4 19. Employees working in areas where there is a possible danger of head injury from impact, or from falling or flying objects, or from electrical shock and burns shall be protected by which of the following? a. Safety goggles b. Helmet c. Steel toed boots d. Scaffolding 20. In a public swimming pool, diving equipment shall be installed in accordance with the specifications of which of the following? a. Florida Building Code b. FAC Chapter 64E-9 c. Manufacturers specifications 21. According to the Guide to Shotcrete Manual the slump of concrete should be maintained between: a. 1 2 b. 1-1/2 2-1/2 c. 1-1/2 3 d When applying shotcrete to form thick walls, an alternate approach is to bring the material application to within of the finish grade. a. ¼ to ¾ b. ¼ to 1 c. ½ to 1-1/4 d /2 23. When applying a shotcrrete flash or finish coat which finish method is most difficult to achieve? a. Wood Float b. Brush c. Rubber Float d. Steel Trowel 24. The operating pressure of the shotcrete air compressor is 60psi.for any job with a hose length of 100ft or less. What should the operating pressure be raised to where the job requires 250 of hose length? a. 60 psi b. 65psi c. 70psi d. 75 psi 1 Exam Prep State Swimming Pool Contractor Feedback -1 4

5 25. Vinyl liner wrinkling, plaster & concrete etching, rapid dissipation of sanitizer and Corrosion of metals are all indicators of: a. Low PH b. High PH c. Chelation d. Sequestration 26. The best tool to level a 24 inch pool tile is a. Bubble level b. Transit c. Ruler d. String 27. Chlorine gas has a characteristic greenish yellow color and is about times as heavy as air a. 1-1/2 b. 2-1/2 c. 3-1/2 d. 4-1/2 28. When product testing for the hydrostatic integrity of a pressure service filter tank how many times is the schedule of pressure & relief cycle repeated? a. 500 times b. 1,000 times c. 10,000 times d. 20,000 times 29. Among the possible causes of cavitation are a. Partially closed or restricted suction line b. Leak in the plumbing on the vacuum side of the the circulation system c. A dirty vacuum filter that needs cleaning 30. When cleaning a pool deck that has been contaminated with bodily fluids the recommended cleaning solution is a. Muriatic Acid dilute solution 2% b. Sodium Hypochlorite dilute solution 10% c. Ammonia dilute solution 3% d. Tap water 1 Exam Prep State Swimming Pool Contractor Feedback -1 5

6 31. All pools shall be provided with at least one 18 diameter lifesaving ring with what length of rope? a. 8 feet b. 16 feet c. 24 feet d. Sufficient length to reach all parts of the pool from the pool deck 32. Pool Chemicals shall be stored in a a. Cool, dry and well ventilated area b. Under a roof c. In an area not accessible to the public 33. What is the weight of one gallon of water? a. 7.50lbs b lbs c lbs d lbs 34. An organic chemical that forms more thatn one bond to metal ions in solution forming complexes that have different properties than the original metal ion is a a. Sequestering Agent b. Chelating Agent c. Complexing Agent 35. How long will it take to raise the temperature 40 degrees in a spa that holds 1000 gallons with the water being heated with a gas fired heater rated at 175,000 BTU? a. 1 hr b. 1-1/2 hr c. 2 hr d. 2-1/2 hr 36. How often would you have to replace the water in a spa that has dimensions of 31ft in diameter and is 3 feet deep with a bather load of 45 users in a 24 hour period? a. 112 days b. 125 days c. 180 days d. 365 days 1 Exam Prep State Swimming Pool Contractor Feedback -1 6

7 37. A customer of yours wants the temperature of his pool water at 30 degrees Celsius. The water temperature is currently at 84 degrees Fahrenheit. How many degrees (in Fahrenheit) will you have to adjust the water temperature up or down?. a b c d How many BTU s does it take to heat 1 gallon of water? a..432 b c d In a commercial public swimming pool the hydraulic capacity of the surface skimming overflow system shall be capable of handling of the circulation flow. a. 50% b. 75% c. 90% d. 100% 40. The maximum slope for a wooden pool decking shall be a. 1/8 per 1 foot b. ¼ per 1 foot c. ½ per 1 foot d. 1 per 1 foot 41. According to the American National Standards Institute the maximum height for step risers on a pool Deck shall be a. 7 inches b. 7-1/4 inches c. 7-1/8 inches d. 7 ½ inches 42. The clearance between the filter tank and cartridge(s) or elements or adjacent cartridges shall be at Least. a..25 inch b..50 inch c..75 inch d. 1.0 inch 1 Exam Prep State Swimming Pool Contractor Feedback -1 7

8 43. How many cubic feet of water are in 1 gallon? a cubic ft b cubic ft. c cubic ft d..463 cubic ft. 44. Chlorine chemical generators (in-line & brine tank) and chemical feeders for pool chlorinator systems shall be capable of supplying no less than of chlorine per day, per 10,000 gallons. a. 1 lb b. 2 lb c. 3 lb d. 4 lb 45. Among the advantages of using Bromine instead of Chlorine in a high use application like a spa are: a. less odor b. less irritating to the eyes c. less irritating to mucous membranes d. all of the above 46. When installing a moveable floor to provide ADA accessibility to a pool it is important that the pool Coping be no greater than different in height thatn the moveable floor. a...25 inches b..50 inches c..75 inches d inches 47. In a pool that is less than 30 feet in width the wall inlets shall be spaced not to exceed. a. 5 feet b. 10 feet c. 15 feet d. 20 feet 48. What is the best way to clean a very dirty (stained) water line? a. Lower the PH of the pool for a period of time b. Drain and acid wash the pool c. Super chlorinate the pool d. Use a chelating agent 1 Exam Prep State Swimming Pool Contractor Feedback -1 8

9 49. When the vacuum gauge reading goes up and flow rate of the returns drops to a minimum it is most likely a good indicator of: a. Blocked pressure line b. dirty filter c. dirty hair & lint strainer d. media element is torn 50. An organic chemical that forms more thatn one bond to metal ions in solution forming complexes that have different properties than the original metal ion is a a. Sequestering Agent b. Chelating Agent c. Complexing Agent 1 Exam Prep State Swimming Pool Contractor Feedback -1 9

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11 1 Exam Prep State Pool Contractor Feedback Answers 1. What valves are not part of the pool recirculation system? d. Hydrostatic Valves Answer reference: CPO Page Given the minimum required wattage required, how many 200 watt underwater lights are required in a 20 X 40 outdoor pool? a. Two Answer Reference: _64e (2) (c) 2 20 X 40 = 800 sq ft x.5 watts = 400 watts / 200 = 2 lights 2. What is the contact wood area that is necessary to form & pour concrete wall 6 high, 25 long and 8 thick? b. 296 sq ft 6x24x2= 288 plus 8/12x6x2= = 296 sq ft Answer reference: Walkers 3. How many board feet of wood would be required to build a partition wall that measures 8 high x 25 long and is 4 thick with one 2x4 sole plate but a double plate at the top? Assume studs placed a 18 O.C. d. 62 board feet Formula for board feet is in Walkers page 746; name of lumber x length/ 12 = BF Formula to calculate # studs is span / spacing, round up and add 1 (this places stud at each end Double top plate: 2x4x25 / 12x2 = BF Bottom sole plate: 2x4x25/ 12 = BF Stud wall: 25/1.5 = (round up) 17+1 = 18 studs with one on each end 18 studs x 8 high = 144 L.F. 2x4 x 144 / 12 = 12 BF = 62 BF Answer reference: Walkers 4. In preparation for a shotcrete application, wire reinforcement should be placed so that it is running in both directions and spaced apart. b. 4 Answer reference: Shotcrete Exam Prep State Swimming Pool Contractor Feedback -1 11

12 5. Among the duties of a shotcrete pump operator is to c. Monitor water content by observing the slump Answer reference: Shotcrete What is the term for quickly opening & closing a welding tank s valve to clean out debris? b. Cracking Answer reference: OSHA (d) (1) 7. What is a measure of the water clarity level? b. NTUs Answer reference: CPO Page 138 Nephelometer Turbidity Units 8. Given the following, what should the vacuum gauge reading on this system if the TDH is 60 feet of head and the pressure gauge reads 25 psi? a. 2.0 Answer reference: CPO Pg. 127 & 267 Pressure side head 25 x 2.31 = = 2.25 Vacuum side head 2.25 / = (round up to 2) Vacuum side gauge reading 10. What should you do when you change a chlorine gas cylinder? c. Change the seal. Answer reference: CPO Pg How many gallons are in the following L shaped pool? The long side of the pool is 20 feet wide, 40 feet long with an average depth of 3.5 feet. The short side of the L is 20 feet long and 20 feet wide with an average depth of 8 feet. c. 44,880 Answer reference: CPO Pg x 40 x 3.5 = 2, x 20 x 8 = 3,200 2, ,200 = 6,000 x 7.48 = 44, Shotcrete will lose slump during pumping. Entrained air is also lost if the concrete free falls in the pump system. The loss depends on which of the following:. Answer reference: Shotcrete You are operating a swimming pool with a flow rate of 744 gallons per minute. Calculate the minimum size of cartridge filter for a 2 pump system. a. 1,984 FA = FR FMR 1,984 = Answer reference: CPO Pg Exam Prep State Swimming Pool Contractor Feedback -1 12

13 14. Which is a requirement for testing water in a commercial swimming pool? d. None of the above. Answer reference: 64E-9.004(11) 15. To assist the pool operator in performing the daily maintenance requirements, all circulation components should be. Answer reference: CPO Pg Which wire tie is normally used when tying wall reinforcement? b. Wrap and snap Answer reference: CRSI In the dry mix process, adding water to the aggregate before mixing to bring its moisture content to about 3-6% is called b. predampening Answer reference: Shotcrete What is the maximum recommended spacing of anchors for most vertical applications? b. 36 on centers Answer reference: Shotcrete Employees working in areas where there is a possible danger of head injury from impact, or from falling or flying objects, or from electrical shock and burns shall be protected by which of the following? b. Helmet Answer reference: OSHA (A) 20. In a public swimming pool, diving equipment shall be installed in accordance with the specifications of which of the following? c. Manufacturers specifications Answer reference: ANSI According to the Guide to Shotcrete Manual the slump of concrete should be maintained between: c. 1-1/2 3 Answer reference: Shotcrete When applying shotcrete to form thick walls, an alternate approach is to bring the material application to within of the finish grade. b. ¼ to 1 Answer reference: Shotcrete Exam Prep State Swimming Pool Contractor Feedback -1 13

14 23. When applying a shotcrrete flash or finish coat which finish method is most difficult to achieve? d. Steel Trowel Answer reference: Shotcrete The operating pressure of the shotcrete air compressor is 60psi.for any job with a hose length of 100ft or less. What should the operating pressure be raised to where the job requires 250 of hose length? a. 60 psi Answer reference: Shotcrete Vinyl liner wrinkling, plaster & concrete etching, rapid dissipation of sanitizer and corrosion of metals are all indicators of: a. Low ph Answer reference: CPO Pg 61 & ANSI 1 Appendix A Chemical Operational Parameters (ph) 26. The best tool to level a 24 inch pool tile is d. String Answer reference: Trade Knowledge 27. Chlorine gas has a characteristic greenish yellow color and is about times as heavy as air b. 2-1/2 Answer reference: ANSI - all books in the appendix section titled Use of Elemental Chlorine 28. When product testing for the hydrostatic integrity of a pressure service filter tank how many times is the schedule of pressure & relief cycle repeated? d. 20,000 times Answer reference: ANSI 50: Annex B - B.1.4 Hydrostatic Pressure Test Method 29. Among the possible causes of cavitation are Answer reference: CPO Page When cleaning a pool deck that has been contaminated with bodily fluids the recommended cleaning solution is b. Sodium Hypochlorite dilute solution 10% Answer reference: CPO Page All pools shall be provided with at least one 18 diameter lifesaving ring with what length of rope? d. Sufficient length to reach all parts of the pool from the pool deck Answer reference: 64E (2) 1 Exam Prep State Swimming Pool Contractor Feedback -1 14

15 32. Pool Chemicals shall be stored in a Answer reference: 64E (5) 33. What is the weight of one gallon of water? c lbs Answer reference: CPO Pg 262 Table B-4 Conversion & Calculation Guide 34. An organic chemical that forms more that one bond to metal ions in solution forming complexes that have different properties than the original metal ion is a Answer reference: CPO Glossary Definitions: Chelating Agent pg How long will it take to raise the temperature 40 degrees in a spa that holds 1000 gallons with the water being heated with a gas fired heater rated at 175,000 BTU? c. 2 hr BTU= Gallons x 8.33 x Temp Rise /heater Capacity = Answer reference: CPO Page 157 Gas Heater Sizing hrs 333,200 =1000 x 8.33 x ,200 / 175,000 = or 2 hrs 36. How often would you have to replace the water in a spa that has dimensions of 31ft in diameter and is 3 feet deep with a bather load of 45 users in a 24 hour period? b. 125 days Answer reference: CPO Pg 170 Water Replacement Replacement Interval (days) = Gallons / 3 / users per day XX = (3.14x15.5x15.5 x 3) x 7.48 / 3 / 45 XX= ( x 3) x 7.48 / 3 / 45 XX = (2, ) x 7.48 / 3 / 45 XX = 16, / 3 / 45 = days 37. A customer of yours wants the temperature of his pool water at 30 degrees Celsius. The water temperature is currently at 84 degrees Fahrenheit. How many degrees (in Fahrenheit) will you have to adjust the water temperature up or down? c Answer reference: CPO Pg 262 Table B-4 Conversion & Calculation Guide F = (C x 1.8 ) + 32 X = (30 x 1.8) + 32 X = (54) degrees Fahrenheit is what he desires 1 Exam Prep State Swimming Pool Contractor Feedback -1 15

16 38. How many BTU s does it take to heat 1 gallon of water? d Answer reference: CPO Pg 156 Gas Heater Sizing 39. In a commercial public swimming pool the hydraulic capacity of the surface skimming overflow system shall be capable of handling of the circulation flow. d. 100% Answer reference: ANSI The maximum slope for a wooden pool decking shall be b. ¼ per 1 foot Answer reference: ANSI According to the American National Standards Institute the maximum height for step risers on a pool deck shall be d. 7 ½ inches Answer reference: ANSI or ANSI The clearance between the filter tank and cartridge(s) or elements or adjacent cartridges shall be at least. a..25 inch Answer reference: ANSI How many cubic feet of water are in 1 gallon? c cubic ft Answer reference: CPO page 25 1 cubic ft water = 7.48 gallons Therefore 1 / 7.48 = cubic ft 44. Chlorine chemical generators (in-line & brine tank) and chemical feeders for pool chlorinator systems shall be capable of supplying no less than of chlorine per day, per 10,000 gallons. c. 3 lb Answer reference: ANSI 50 Annex J - J sizing a pool chlorinator system 45. Among the advantages of using bromine instead of chlorine in a high use application like a spa are: d. all of the above Answer reference: CPO page When installing a moveable floor to provide ADA accessibility to a pool it is important that the pool coping be no greater than different in height than that of the moveable floor. b..50 inches Answer reference: CPO page Exam Prep State Swimming Pool Contractor Feedback -1 16

17 47. In a pool that is less than 30 feet in width the wall inlets shall be spaced not to exceed. d. 20 feet Answer reference: 64E-9.007(9)(a) 48. What is the best way to clean a very dirty (stained) water line? b. Drain and acid wash the pool Answer reference: CPO page When the vacuum gauge reading goes up and flow rate of the returns drops to a minimum it is most likely a good indicator of: c. dirty hair & lint strainer Answer reference: CPO page An organic chemical that forms more that one bond to metal ions in solution forming complexes that have different properties than the original metal ion is a Answer reference: CPO Glossary - Definitions Chelating Agent pg Exam Prep State Swimming Pool Contractor Feedback -1 17