Esco Heating 208 | 100% Correct Answers | Verified | Latest 2024 Version

1. A gas furnace is to be installed in a garage. The burners and ignition sources must be located ______ above the floor. A: 6 inches B: 12 inches C: 18 inches D: 24 inches - C: 18 inches 2. A good description of how hi-metai fan switch operates the blower motor on a gas furnace is: A: temperature on - time off. B: temperature on - time on. C: temperature on- temperature off. D: time on - time off. - C: temperature on- temperature off 3. Redundant gas valves used on gas furnaces will shut down if gas pressure exceeds: A: 30.5 in. W.C. B: 60.5 in. W.C. C: 10.5 in. W.C. D: 13.5 in. W.C. - D: 13.5 in. W.C. 4. Burning one cubic foot of Liquefied Petroleum gas completely will produce approximately ____BTU's. A: 2,000 - 2,500 B: 1,500-2.000 C: 1,200-1,500 D: 900-1,100 - A5. LP gas has a specific gravity of: A: .4-.8 B: 1.0-1.1 C: 1.5-2.0 D: 2.5 -3.0 - C: 1.5-2.0 6. What is the purpose of a spoiler screw located on a burner? A: Mix combustion and dilution air B: Mix primary and secondary air. C: Mix primary air and gas. D: Mix dilution and excess air. - C: Mix primary air and gas 7. Furnace limit switches are wired in series with the: A: low speed fan B: high speed fan C: gas valve D: heat anticipator - C: gas valve 8. A technician is using an extension ladder to work on roof top unit. The top of the ladder should extend beyond the support point. A: l foot B: 2 feet C: 3 feet D: 4 feet - C: 3 feet 9.A technician determines that a natural gas furnace has a defective heat exchanger. The technician should: A: inform the homeowner.B: turn the thermostat off. C: turn the gas to the furnace off. D: All of the above. - D: All of the above. 10. A natural gas (standing pilot) furnace usually requires ____gas pressure at the manifold and burners. A: 3.5 in- W.C. B: 4.2 in. W.C. C: 5.0 in, W.C. D: 7.0 in. W.C. - A: 3.5 in- W.C. 11. The vent system for a condensing furnace is classified as ______by the National Field Gas Code. A: Category I B: Category II C: Category III D: Category IV - D: Category IV 12. Type B vent pipe mast he kept at least _____from combustible materials. A: one eighth inch B: one quarter inch C: one half inch D: one inch - D: one inch 13. All condensing furnaces manufactured after 1992 must have an AFUE rating ot at least: A: 80% B: 86%