Florida Air Conditioning Contractors Practice Exam #2 PDF

Florida Air Conditioning Contractors Practice Exam #2 1. The __________ allows the oil pressure to build up to preset operating pressure on compressor start. A. Time delay switch B. Control circuit C. Thermostat D. Pressure control...

Florida Air Conditioning Contractors Practice Exam #2 1. The __________ allows the oil pressure to build up to preset operating pressure on compressor start. A. Time delay switch B. Control circuit C. Thermostat D. Pressure control 2. Ladders shall be located in trench excavations that are 4 feet or more in depth as to require no more than __________ feet of lateral travel. A. 10 B. 15 C. 20 D. 25 3. The contractor proposes to lift 1,800 pounds using block and tackle. The angle will be 90 degrees. The maximum load the contractor can lift is __________ pounds. A. 1,800 B. 1,277 C. 2,538 D. 1,410 4. Most dry-type transformers range from __________% to __________% efficient, due mostly from, losses that occur for the core (magnetizing), and coils (resistance and impedance). A. 93 - 96 B. 94 - 98 C. 92 - 96 D. 93 - 98 5. When making sound brazements of tubing in the air conditioning and refrigeration industry, __________ are used when joining steel to bronze. A. Silver brazing alloys B. Filler metal C. Phos-copper brazing alloys D. Mixed brazing alloys 6. A SEER of 13 means that the unit provides __________ Btu’s of cooling per watt-hour of electricity. A. 7 B. 13 C. 21 D. 28 7. Free moisture in a refrigeration system creates __________ in the orifice of a refrigerant flow control device. A. Water droplets B. Frost C. Ice D. Dampness 8. The Z-framing for an access door Flange on Opening requires __________ inches on center. A. # 8 x 1 1/4-inch galvanized screws 6 B. #10 x 1 1/4-inch galvanized screws 6 C. # 6 x 1 1/4-inch sheet metal screws 8 D. #10 x 1 1/4-inch sheet metal screws 6 9. Upon installation of an eye bolt, the shoulder of the ring bolt must be at __________ angles to the axis of the hole and must contact the working surface when the nuts are properly torqued. A. Center B. Left C. Right D. Middle 10. In a commercial structure, the skylight area shall not be greater than __________ percent of the gross roof area. A. 3 B. 4 C. 5 D. 6 11. The safe working load (SWL) of Grade 100/120 Improved Plow Grade steel core 3/4-inch rope is __________ pounds. A. 8,400 B. 9,560 C. 10,450 D. 12,650 12. Every steam boiler shall be equipped with a (an) __________. A. Emergency cut-off switch B. Boiler plate C. Steam siphon valve D. Bottom blowoff valve 13. All metal screws penetrating duct board shall be no more than __________ inch(es) longer than the board thickness. A. 7/8 B. ½ C. 1 D. 1¼ 14. Do not attempt to take high voltage (600 volts or greater) measurements __________. A. Without taking extra safety precautions as outlined by OSHA B. With hand-held instruments C. With hand-held instruments unless extra safety precautions are taken as outlined by OSHA D. By yourself 15. The chemical compound and name for the replacement of R-22 in commercial, residential AC, and commercial refrigeration is __________. A. HCFC, R-123 B. HCFC, R-437A C. HFC, R-407C D. HCFC, R-438A 16. Condensate waste and drain line size shall be not less than __________ inch internal diameter and shall not decrease in size from the drain pan connection to the place of condensate disposal. A. ¼ B. ½ C. ¾ D. 7/8 17. The maximum allowable slope for sandy loam less than 20 feet deep shall be __________. A. 3/4:1 B. 1:1 C. 1 1/2:1 D. 2:1 18. __________ is NOT one of the four components of the refrigeration cycle. A. Expansion valve B. Evaporator C. Compressor D. Heat pump 19. One-watt equals __________ BTU/hour. A..0134 B. 3.412 C. 13.4 D. 26.78 20. Chimney connectors used on heat producing appliances shall be installed to maintain a rise of at least __________ percent. A. 1 B. 2 C. 3 D. 4 21. Collars to which flexible duct is attached shall be a minimum of __________ inches in length. A. 2 B. 3 C. 4 D. 8 22. The safety factor for the 1/2-inch rope is 6. The SWL is __________ ton(s). A. 1 B. 1.5 C. 2 D. 3 23. R-410B shall be classified as a/an __________. A. Zeotrope B. Azeotrope C. Diatrope D. Isotope 24. Access openings in air ducts shall be identified with letters having a minimum height of __________ inch (es) to indicate the location of fire protection devices within. A. ½ B. ¾ C. 7/8 D. 1 25. The temperature drop across an evaporator is about _____ degrees when it is operating in typical conditions. A. 10 B. 20 C. 30 D. 40 26. For volume damper installation, both ends of the volume damper reinforcement sleeves are to be installed a minimum of __________ inches beyond the damper blades. A. 2 B. 3 C. 4 D. 5 27. A __________ fastens standing portions within 2 inches of each end and elsewhere at 8-inch spacing or less. A. Drive slip B. Standing drive slip C. Plain “S” slip D. Standing “S” slip 28. Filters for exhaust duct systems shall be __________ feet above the appliance cooking surface. A. 3 B. 4 C. 3½ D. 2 29. Ducts serving exhaust systems for the removal of grease from commercial kitchens shall be constructed of stainless steel that shall not be less than __________ gauge in thickness. A. 14 B. 16 C. 18 D. 20 30. Saturated refrigerant-407C having a 125 psig, will have a gas temperature of __________°F. A. 70 B. 80 C. 90 D. 100 31. Where enclosures are NOT required, hoods, grease removal devices, exhaust fans and ducts shall have a clearance of at least __________. A. 18 inches to combustible material, 3 inches to limited combustible material, and 0 inches to noncombustible B. 3 inches to limited combustible material, 0 inches to noncombustible and 18 inches to combustible material C. 0 inches to limited combustible, 18 inches to noncombustible material and 3 inches to combustible material D. 18 inches to limited combustible material, 3 inches to combustible material and 0 inches to noncombustible material 32. Liquid adhesive coatings used on air filters shall have a flash point not lower than __________°F. A. 325 B. 335 C. 345 D. 355 33. The flange used to seal off the end of a pipe is called the __________. A. Blind flange B. Blank flange C. End stop D. Butt flange 34. The friction loss is.25 inches of water per 100 feet. The velocity is 3,200 feet per minute. The cubic feet of air per minute is __________. A. 30,000 B. 32,000 C. 35,000 D. 40,000 35. Furnace plenums shall be located a minimum of __________ inches from the heat exchanger measured along the centerline of airflow. A. 20 B. 22 C. 24 D. 36 36. Type __________ is NOT one of the three commercial grades of polyethylene pipe. A. I B. II C. III D. IV 37. Auxiliary drain pans on equipment and appliances containing evaporators or cooling coils shall have a minimum depth of 1 ½ inches and shall not be less than __________ inches larger than the unit. A. 2 B. 3 C. 4 D. 5 38. In no case shall a smoke damper be installed more than __________ feet from the smoke barrier or after the first air duct inlet or outlet, whichever is closer to the smoke barrier. A. 2 B. 3 C. 3½ D. 4 39. Comfort involves all of the following except _____________. A. humidity B. temperature C. air movement D. heat index 40. Pressure-relief devices, fusible plugs and purge systems located within the machinery room shall terminate outside the structure at a location at least __________ feet above the adjoining grade level. A. 10 B. 12 C. 15 D. 18 41. Natural gas furnaces are designed to operate with a __________ inch water-column pressure and pressure regulators are used to maintain these pressures. A. 1 ½ to 2 B. 2 to 3 ½ C. 3 to 4 D. 3 ½ to 4 42. The __________ gate valve can be installed in any position without danger of the disc jamming. A. Flanged B. Solid wedge C. Double disc type D. Split type 43. __________ is/are NOT one of the practical methods to maintain the correct workable head pressure. A. Relays B. Dampers C. Fan cycling D. Condenser flooding 44. Air cooled condenser dampers or shutters can be placed at the condenser ____________. A. inlet or outlet B. outlet only C. inlet only D. bottom 45. When a piping system is colored yellow or orange, its contents will be classified as __________ materials. A. Fire protection B. Dangerous C. Safe D. Protective 46. A substance that can be changed readily to a vapor by boiling it and changed back to a liquid by condensing it without altering its characteristics is a ______________. A. flexible compound B. temperature dependent vapor/liquid C. stabilizer D. refrigerant 47. __________ is the volume occupied by one pound of a fluid. A. Relative humidity B. Humidity ratio C. Vapor pressure D. Specific volume 48. Polyethylene pipe is joined by means of __________ clamps. A. Threading and stainless steel B. Plastic fittings and C. Stainless steel fittings and D. Plastic fittings and stainless steel 49. __________ is NOT a possible cause of high suction pressure. A. Burned-out motor B. Evaporator overloaded C. Expansion valve stuck open D. Leaking compressor suction valves 50. Removing air and water vapor from a system is called ______________. A. evacuation B. degassing C. dehydration D. capturing ***Please see Answer Key on the following page*** HP 11/20/2024  Florida Air Conditioning Contractors Practice Exam #2 Answer Key Answer Reference Section/Page# 1. A Air Conditioning and Refrigeration Troubleshooting Handbook 22 2. D Code of Federal Regulations, (OSHA) 1926.651 (c)(2) 3. C Florida Contractors Manual 7-82 1,800 x 1.41 = 2,538 lbs. 4. D Energy Systems Analysis and Management 4.3.2 5. A Air Conditioning and Refrigeration Troubleshooting Handbook 311 6. B Energy Efficient Building Construction Florida 270 7. C Air Conditioning and Refrigeration Troubleshooting Handbook 57 8. D Fibrous Glass Duct Construction Standards Figure 4.9 9. C Florida Contractors Manual 7-79 10. A Florida Building Code, Energy Conservation C402.4.1 Energy Efficient Building Construction Florida 147 11. B Florida Contractors Manual 7-69 4.78 tons x 2,000 lbs. per ton = 9,560 lbs. 12. D Florida Building Code, Mechanical 1008.1 13. B Fibrous Glass Duct Construction Standards 3.1 14. B Air Conditioning and Refrigeration Troubleshooting Handbook 435 15. C Energy Systems Analysis and Management Manual Table 10-2 16. C Florida Building Code, Mechanical 307.2.2 17. B Code of Federal Regulations, (OSHA) 1926.651 Subpart P Appendix B Table B-1 18. D Refrigeration and Air Conditioning Technology 47 19. B Energy Systems Analysis and Management Manual 18.1.2 Energy Efficient Building Construction Florida 269 20. B Florida Building Code, Mechanical 803.10.5 21. A HVAC Duct Construction Standards, Metal and Flexible 4th Edition: 3.48 3rd Edition: 3.33 22. B Florida Contractors Manual 7-69 SWL = ½ x ½ x 6 = 1.5 tons 23. A Florida Building Code, Mechanical Table 1103.1 Answer Reference Section/Page# 24. A NFPA 90A 4.3.5.2 25. B Refrigeration and Air Conditioning Technology 1232 26. B Fibrous Glass Duct Construction Standards 6.8 27. B HVAC Duct Construction Standards, Metal and Flexible 4th Ed.: 2.6, Fig. 2-1 3rd Ed.: 2.6, Fig. 2-1 28. B NFPA 96, 2021 15.5.3 NFPA 96, 2017 14.5.3 29. C Florida Building Code, Mechanical 506.3.1.1/506.3.1.2 NFPA 96 7.5.1.1 30. D Refrigeration and Air Conditioning Technology 46 31. A NFPA 96 4.2.1 32. A Florida Building Code, Mechanical 605.1 NFPA 90B 2024 Edition: 7.1.3.3 2021 Edition: 7.1.3.3 33. A Pipefitter's Handbook 5-87 34. A Refrigeration and Air Conditioning Technology 1122 35. D NFPA 90B 2024 Edition: 5.1.3.2 2021 Edition: 5.1.3.2 36. D Pipefitter's Handbook 3-28 37. B Florida Building Code, Mechanical 307.2.3(1) 38. A NFPA 90A 5.3.5.1 39. D Refrigeration and Air Conditioning Technology 1036 40. C Florida Building Code, Mechanical 1105.7 41. D Air Conditioning and Refrigeration Troubleshooting Handbook 113 42. B Pipefitter's Handbook 5-6 43. A Refrigeration and Air Conditioning Technology 530 44. A Refrigeration and Air Conditioning Technology 532 45. B Pipefitter's Handbook 5-22 46. D Refrigeration and Air Conditioning Technology 45 47. D Refrigeration and Air Conditioning Technology 1657 48. D Pipefitter's Handbook 3-28 49. A Air Conditioning and Refrigeration Troubleshooting Handbook 463 50. A Refrigeration and Air Conditioning Technology 194