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New file with Ans. SLIDE # 2. 1. One of the two major categories used to assign refrigerants to a specific code group. Flammability Permissibility c. Solubility d. Coefficient Of Performance. 1a. One of the two major categories used to assign refrigerants to a specific code group.

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  1. New file with Ans.

  2. SLIDE # 2

  3. 1. One of the two major categories used to assign refrigerants to a specific code group Flammability Permissibility c. Solubility d. Coefficient Of Performance

  4. 1a. One of the two major categories used to assign refrigerants to a specific code group Flammability ARI P 303 4th

  5. 2. What change will cause a cylinder unloader to actuators • Crankcase oil pressure • Compressor discharge pressure • Receiver float switch • Liquid line pressure

  6. 2a. What change will cause a cylinder unloader to actuators • Crankcase oil pressure HVACR P 183

  7. 3. Underground gas line for an outside appliance: what is the minimum depth • 6" • 8" • 10” • 12"

  8. 3a. Underground gas line for an outside appliance: what is the minimum depth d. 12” IFGC = 404.12 p 70

  9. 4. What minimum distance from any exterior building wall shall an underground fuel oil tank be installed • 1' • 2' • 3' • 5'

  10. 4a. What minimum distance from any exterior building wall shall an underground fuel oil tank be installed b. 2' Check EPA vent pipe or fill pipe is two feet

  11. 5. What type of refrigerating system is normally operated by heat energy collected in solar panels • Centrifugal • Reciprocal • Rotary • Absorption

  12. 5a. What type of refrigerating system is normally operated by heat energy collected in solar panels d. absorption HVACR P141

  13. 6. Controller converts a signal device into a appropriate means to cause a change in the controller device. • Controller • Transducer • Transmission • Preset controller

  14. 6a. Controller converts a signal device into a appropriate means to cause a change in the controller device. b. transducer HVACR P 585 "Webster" Converts energy

  15. 7. DDC = • Direct Demand Control • Direct Digital Control • Decentralized Digital Computer • Demand Distribution Computer

  16. 7a. DDC = b. Direct Digital Control HVACR P 1470 & 638

  17. 8. What is minimum replace thickness of a steel shield plate protecting concealed gas piping • 1/32" • 1/16" • 1/8" • 1/4 “

  18. 8a. What is minimum replace thickness of a steel shield plate protecting concealed gas piping b. 1/16“ 2006 IMC IFGC 2012 404.7 P 69 16 gage

  19. 9. What working pressure is required for steel fitting on LP gas that will have a vapor operating pressure of 30 Psi. • 30 Psi • 45 • 100 • 125

  20. 9a. What working pressure is required for steel fitting on LP gas that will have a vapor operating pressure of 30 Psi. d. 125

  21. 10. Fitting on LP gas containers shall have a • Working Pressure of at least 250 Psi. • Working Pressure of at least 350 Psi. • Test pressure of at least 250 Psi. • Test Pressure of at least 350 Psi.

  22. 10a. Fitting on LP gas containers shall have a • b. working Pressure of at least 350 Psi. NFPA 58 TA 5.8.4.1 P 58-22

  23. 11. Where is a storage tank for water located in a natural convection, closed solar water heating system • Same level as the collector • Above the level of the collector • Below the level of the collector • Location has no effect.

  24. 11a. Where is a storage tank for water located in a natural convection, closed solar water heating system d. location has no effect. I thought No effect or d. Natural Convection

  25. 12. Group B1 refrigerant. • R 134 • R 123 • R 717 d. R 11

  26. 12a. Group B1 refrigerant. b. R 123 B1 HVACR P 269

  27. 13. What shall be installed to prevent excessive Pressure build-up in LP pipe that can be insolated from the system. • hydrostatic relief valve • Pressure relief valve • Rupture plate • Rupture disk

  28. 13a. What shall be installed to prevent excessive Pressure build-up in LP pipe that can be insolated from the system. a. hydrostatic relief valve LP NFPA 58 p 58-38

  29. 14. Where shall return piping that is used to carry fuel oil connected to the fuel tank. • on side • at bottom • on front • at the top.

  30. 14a. Where shall return piping that is used to carry fuel oil connected to the fuel tank. d. at the top. Old L.P. boiler book shows top Page 8 IMC 1305.4 P92 2000 code

  31. 15. The expansion tank in Hot water is rated for • pressure • temperature • total number of gallons in the water system • minimum with level.

  32. 15a. The expansion tank in Hot water is rated for c. total number of gallons in the water system IMC 1009.2 P 93 2012

  33. 16. The following materials are permitted to run L.P. gas thru except Cast Iron Poly Black steel Aluminum

  34. 16a. The following materials are permitted to run L.P. gas thru except Cast Iron Poly Black steel Aluminum

  35. 17. In order to prevent back draft on an appliance you should install? • Back draft damper • Rain cap • Draft hood • ?

  36. 17a. In order to prevent back draft on an appliance you should install? • Draft hood IFGC 2012 Definitions P 11

  37. 18. Insulation is recommended for the following except • Liquid line in a hot room • Suction line outside • Liquid line in direct sunlight • ?

  38. 18a. Insulation is recommended for the following except • Liquid line in a hot room HVACR P407

  39. 19. On a 250,000 BTU appliance what type of control is required. • Fuel shutoff • ? • ? • ?

  40. 19a. On a 250,000 BTU appliance what type of control is required. • Fuel shutoff • ? • ? • ?

  41. 20. What is the minimum pressure a 24 Psi can operate? • 3 Psi • 6 Psi • 10 Psi • 20 Psi

  42. 20a. What is the minimum pressure a 24 Psi can operate? • 3 Psi HVACR P 1221

  43. 21. Clearing oil passages in an atomizer should be done when a. As soon as possible

  44. Clearing oil passages in an atomizer should be done when a. As soon as possible

  45. All of the following cause a safety shutdown except. • Low water pressure • Low steam • High fuel pressure • Low fuel pressure

  46. All of the following cause a safety shutdown except. b. Low Steam

  47. Minimum distance that a pressure gage tee should downstream of fuel gas pressure • 6 Inches • 6 pipe lengths • 12 inches • 10 pipe lengths

  48. Minimum distance that a pressure gage tee should downstream of fuel gas pressure d. 10 pipe lengths

  49. Air vents in Hydronic system should be • Two part answer Low Pressure Boiler P 250

  50. Air vents in Hydronic system should be • Two part answer At the highest location and at the source?

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