HVAC Gas Heat certification exam.pdf file:///C:/Users/HP/Desktop/New%20fl/HVAC%20Gas%20Heat%20ce
HVAC Gas Heat Certification Exam Actual
Questions & Verified Answers
1. A gas furnace is to be installed in a garage.The national standards requirethat the
burners and ignition sources must be located above the floor
Answer 18 inches
2. A good description of how a bi-metal fan switch operates the blower motoron a gas
furnace is
Answer Temperature on- temperature off
3. Redundant gas valves used on gas furnaces have
Answer Dual gas shut off seats
4. Burning one cubic foot of liquefied petroleum gas completely will produce
approximately BTUs
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,HVAC Gas Heat certification exam.pdf file:///C:/Users/HP/Desktop/New%20fl/HVAC%20Gas%20Heat%20ce
Answer 2000 – 2500
5. LP gas has a specific gravity of
Answer 1.5 - 2.0
6. What is the purpose of a spoiler screw located on a burner, or ad-justable-
shutters?
Answer Mix primary air and gas
7. Furnace limit switches are wired in series with the
Answer Gas valve
8. A technician is using an extension ladder to work on roof top unit.The topof the ladder
should extend beyond the support point
Answer 3 feet
9. A technician determines that a natural gas furnace has a defective heat exchanger.
The technician should
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,HVAC Gas Heat certification exam.pdf file:///C:/Users/HP/Desktop/New%20fl/HVAC%20Gas%20Heat%20ce
Answer Inform the homeowner and turn the gas off
10. A natural gas furnace usually requires gas pressure at the manifoldand
burners
Answer 3.5 in. W.C.
11. The vent system for a condensing furnace is classified as by the
National Field Gas Code.
Answer Category IV
12. Type B vent pipe must be kept at least from combustible materials-
Answer One inch
13. Typical condensing furnaces have an AFUE rating of at least
Answer 90%
14. You have installed a Category IV two-pipe vent system that terminates through the
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