Florida Air Conditioning Practice Exam 5 PDF

Florida Air Conditioning Practice Exam 5 1. Fire dampers are not required at penetrations of shafts where steel exhaust subducts extend not less than __________ inches vertically in exhaust shafts provided that there is a continuous flow to the outdoors....

Florida Air Conditioning Practice Exam 5 1. Fire dampers are not required at penetrations of shafts where steel exhaust subducts extend not less than __________ inches vertically in exhaust shafts provided that there is a continuous flow to the outdoors. A. 22 B. 1.83 C. 2 D. 10 2. When manufacturer’s charts are not available, SWL can be calculated by dividing the __________ by the __________. A. Breaking strength, factor of safety B. Weight of the load, factor of safety C. Factor of safety, weight of the load D. Breaking strength, weight of the load 3. Variable speed fan motors can create more consistent operation of the ______________. A. evaporator B. condenser C. TXV D. compressor 4. Residential sliding glass doors shall have an air infiltration rate of no more than __________ cfm per square foot. A. 0.2 B. 0.3 C. 0.4 D. 0.5 5. A typical household refrigerant holds contain only a few _________ of refrigerant. A. pounds B. gallons C. cubic inches D. ounces 6. A molecule of HCFC-123 has ______ carbon atoms. A. 1 B. 2 C. 3 D. 4 7. The usual temperature-rise ratings for dry-type transformers are __________. A. 80°F (176°C), 115°F (239°C) and 150°F (302°C) B. 150°, 115°, 80° C. 176°F (80°C), 239°F (115°C) and 302°F (150°C) D. 176°, 239°, 302° 8. For fibrous duct board, 22 gauge, 2" X 1.5" hangers may substitute for 3” duct hangers with widths not over __________ inches. A. 24 B. 36 C. 48 D. 52 9. A hand-held grinder with a 6" diameter wheel shall be equipped with only a __________. A. Constant pressure switch B. Momentary contact on/off switch C. Positive percussion switch D. Positive on/off switch 10. When the system is operating, refrigerant must be added to the __________ side of the system. A. low pressure B. high pressure C. upper D. lower 11. NFPA 90A states connectors are more restricted and are generally limited to __________ feet. A. 16 B. 14 C. 24 D. 12 12. When staple flaps are not present, cross tabs are to be equally spaced on each side of the joint and made from __________-inch minimum lengths of closure tape A. 4 B. 6 C. 8 D. 10 13. A flammable or combustible heat transfer fluid from a solar energy system shall not be used in __________. A. Hot weather climates B. Cold weather climates C. A heat exchanger located outdoors D. A heat exchanger located in a duct system 14. An unlisted automatically fired system with a temperature limit control that cannot be set higher than 250°F burns gas fuel and is installed in a room that is large in comparison with the size of the appliance. For safety reasons, this system must have a minimum clearance of __________ inches in front. A. 18 B. 20 C. 22 D. 24 15. Air connectors shall not pass through any wall, partition, or enclosure of a vertical shaft required having a fire resistance rating of __________. A. 2 hours or more B. 1 hour or more C. 3 hours or more D. 1 and one-half hours or more 16. A grounded compressor motor winding is indicated by __________. A. A mild shock on contact B. An infinity reading C. A large shock D. A low resistance reading on the ohmmeter 17. Class 0 or Class 1 rigid or flexible air ducts UL 181 rated shall not be used as vertical air ducts that are more than __________ stories in height. A. 5 B. 3 C. 4 D. 2 18. A roof top mount exhaust system on a building 10 feet tall should have a velocity of __________ fpm. A. 500 B. 1,000 C. 2,500 D. 4,000 19. Which of the following is suitable for use with hydrochloric acid? A. Cast iron B. Aluminum C. Stainless steel D. Type 2 PVC 20. Storage space requires a tank be 10 feet in diameter and contain at least 8,225 gallons. The minimum length of the tank will be __________ feet. A. 3½ B. 7 C. 14 D. 28 21. The accumulator is placed in the __________ line to trap any liquid going to the compressor. A. Suction B. Vapor C. Liquid D. Discharge 22. An Ohmmeter yielding the highest OHMs would be connected __________. A. R to C B. S to R C. S to C D. C to ground 23. A technician is working on a system using R-404A. The condensing temperature is 104°F. The condenser outlet temperature is 90°F. The condenser subcooling is ___________. A. 14°C B. 194°F C. 24°C D. 14°F 24. The type of relay which is positional type and must be properly mounted for satisfactory operation is __________. A. Hot wire relays B. Amperage (current) relays C. Solid-state relays D. Potential (voltage) relays 25. The number of horsepower equivalent to 99,000-foot pounds per minute is __________. A. 1 B. 2 C. 3 D. 5 26. Which of the following manila rope grades is the standard hoisting rope, and usually has an identifying trademark? A. Yacht rope B. Number 1 grade C. Bolt rope D. Number 2 grade 27. R-407A should be in a(n) ___________ cylinder. A. green B. white C. purple D. orange 28. Brazing requires __________________. A. lower heat than soldering B. higher heat than soldering C. 5 to 15% silver alloys D. None of the above 29. The pumps that produce the lowest vacuum are ___________. A. three stage rotary B. two stage in line C. two stage rotary D. one stage in line 30. HFC refrigerants contain no ___________. A. hydrogen B. fluorine C. carbon D. chlorine 31. Refrigerants in the A3 safety group are ___________. A. highly toxic B. highly flammable C. ozone depleting D. unnatural 32. A sufficient amount of frost, or ice, will not be removed from the coil to allow proper refrigeration to occur, if the defrost termination point is __________. A. Too low B. Too high C. Ignored D. Set incorrectly 33. The purpose of the primary control is to __________. A. Control the operation of the oil burner and the ignition procedure B. Sense the stack temperature C. Furnish combustion air to the flame D. Supply fuel oil to the burner 34. Exposure to impulse or impact noise should not exceed __________ dB peak sound pressure level. A. 92 B. 110 C. 140 D. 188 35. A 30" x 30" fibrous glass duct shall be supported by hangers a maximum of __________ feet on center. A. 1 B. 2 C. 4 D. 6 36. According to SMACNA Fibrous Glass Duct Construction Standards, 20" x 12"' diffuser connections in fibrous glass ductwork are to be supported by a bearing plate of __________ gage sheet metal. A. 18 B. 20 C. 22 D. 24 37. The best way to check a capacitor is by the use of a __________. A. Capacitor analyzer B. Running capacitor analyzer C. Amperage relay D. Voltage relay 38. A tinted 1/4 inch single-glazed window has a shading coefficient of __________. A. 0.82 B. 0.68 C. 0.78 D. 0.70 39. 6” supply ducts in residential attics shall be insulated to a minimum of __________. A. R-2 B. R-3 C. R-6 D. R-8 40. Hoods with dampers in the exhaust require an access panel to be located within __________ of the damper. A. 18 inches B. 2 feet C. 2.5 feet D. 3 feet 41. Devices used to detect ice/frost on the outdoor coil during the heating cycle are __________. A. Time-temperature defrost controls B. Schematic controls C. Heat pump defrost controls D. Defrost thermostat 42. The maximum intended load for a frame scaffold including its components is 500 pounds. The scaffold as described shall be designed to support a minimum of __________ ton(s). A. 1.0 B. 1.5 C. 2.0 D. 4.0 43. When using a(n) __________ tank, valves cannot be installed on return piping. A. Fuel oil B. Above-ground C. Below-ground D. Inside 44. The thickness of blown-in or sprayed roof/ceiling insulation (fiberglass or cellulose) shall be written on markers that are installed at least one for every __________ square feet throughout the attic space. A. 30 B. 100 C. 300 D. 1000 45. A 580-foot copper pipe was installed during 40-degree weather. The computed expansion of the line when 220-degree steam is turned on in the line is __________ inches. A. 14.81 B. 13.77 C. 11.93 D. 10.16 46. When appliances are located 16 feet or more above grade, ladders shall have a toe spacing of not less than __________ inches. A. 24 B. 18 C. 12 D. 6 47. The contractor is installing an electric heater in the duct. The heater is 12 inches wide and is being installed in a fibrous glass duct 12 inches by 18 inches. The contractor will need __________. A. 10 square feet of 20 gage sheet metal B. 12 square feet of 22 gage sheet metal C. 9 square feet of 18 gage sheet metal D. 10 square feet of 22 gage sheet metal 48. Duct systems shall be designed and installed in a manner to provide not less than __________ inches clearance to earth. A. 4 B. 6 C. 12 D. 18 49. According to the Mechanical Code, grease duct systems serving Type I hoods shall be designed to provide an air velocity within the duct system of not less than __________ feet per minute? A. 1000 B. 500 C. 300 D. 250 50. Wastewater piping is identified by the color __________. A. Purple B. Blue C. Red D. Green ***Please see Answer Key on the following page*** HP 11/20/2024  Florida Air Conditioning Practice Exam 5 Answer Key Answer Reference Section/Page# 1. A NFPA 90A 5.3.4.6.2 2. A Florida Contractors Manual 7-53 3. C Refrigeration and Air Conditioning Technology 531 4. B Florida Building Code, Energy Conservation R402.4.3 5. D Refrigeration and Air Conditioning Technology 59 6. B Refrigeration and Air Conditioning Technology 227 7. C SMACNA Energy Systems Analysis Manual 4.10 8. C Fibrous Glass Construction Standards 6.3 9. B Code of Federal Regulations, (OSHA) 1926.300(d)(2) 10. A Refrigeration and Air Conditioning Technology 254 11. A NFPA 90A 4.3.2.1.3 12. C Fibrous Glass Construction Standards 3.3 13. D NFPA 90B 2024 Edition: 7.1.8.2 2021 Edition: 7.1.8.2 14. A NFPA 90B 2024 Edition: Table 6.1.2.1 2021 Edition: Table 6.1.2.1 15. B NFPA 90A 4.3.2.1.4 NFPA 90B 2024 Edition: 5.1.2.4 2021 Edition: 5.1.2.4 16. D AC & Refrigeration Troubleshooting Handbook 5 17. D NFPA 90A 4.3.1.2 18. A NFPA 96 8.2.1.1 19. D Pipefitters Handbook 3-41/42 20. C Pipefitters Handbook 5-27 21. A AC & Refrigeration Troubleshooting Handbook 19 22. B AC & Refrigeration Troubleshooting Handbook 7 23. D Refrigeration and Air Conditioning Technology 268 24. B AC & Refrigeration Troubleshooting Handbook 35 25. C Pipefitters Handbook 5-56  Answer Reference Section/Page# 26. B Florida Contractors Manual 7-50 27. A Refrigeration and Air Conditioning Technology 61 28. B Refrigeration and Air Conditioning Technology 156 29. C Refrigeration and Air Conditioning Technology 199-200 30. D Refrigeration and Air Conditioning Technology 221 31. B Refrigeration and Air Conditioning Technology 223 32. A AC & Refrigeration Troubleshooting Handbook 73 33. A AC & Refrigeration Troubleshooting Handbook 137 34. C Code of Federal Regulations, (OSHA) 1926.52(e) 35. D Fibrous Glass Construction Standards Figure 6-1 36. D Fibrous Glass Construction Standards 4.12, Figure 4-12 37. A AC & Refrigeration Troubleshooting Handbook 32 38. C Energy Efficient Building Construction in Florida 146/Table 7-5 39. D Florida Building Code, Energy Conservation , 2023 R403.3.1 Florida Building Code, Energy Conservation , 2020 R403.2.1 40. A NFPA 96 7.3.4 41. C AC & Refrigeration Troubleshooting Handbook 131 42. A OSHA 1926.651(a)(1) 500 x 4 = 2,000 2,000 ÷ 2,000 = 1 ton 43. A Florida Building Code, Mechanical 1305.4 44. C Florida Building Code, Energy Conservation C303.1.1.1 and R303.1.1.2.1 45. C Pipefitters Handbook 5-25 40 Degrees is.444 and 220 Degrees is 2.501 2.501 -.444 = 2.057 x 5.8 = 11.93 46. D Florida Building Code, Mechanical 306.5(3) 47. D Fibrous Glass Construction Standards 6.7 24” long sleeve 60” circumference 24 x 60 = 1440 / 144 = 10 sf. 22 gage 48. A Florida Building Code, Mechanical 603.14 49. B Florida Building Code, Mechanical 506.3.4 50. D Pipefitters Handbook 5-24