ESCO HEATING 208 EXAM ACTUAL 2025/2026 QUESTIONS AND 100% CORRECT ANSWERS

ESCO HEATING 208 EXAM ACTUAL 2025/2026 QUESTIONS AND 100% CORRECT ANSWERS 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 - Answer -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. - Answer -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. - Answer -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 - Answer -A 5. 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 - Answer -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. - Answer -C: Mix primary air and gas7. Furnace limit switches are wired in series with the: A: low speed fan B: high speed fan C: gas valve D: heat anticipator - Answer -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 - Answer -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. - Answer -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.