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NATE/ICE Gas Furnace, Top Questions & Answers. 100% Accurate. Verified.
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NATE/ICE Gas Furnace, Top Questions & Answers. 100% Accurate. Verified. What type of furnace needs a combustible floor base? - -A downflow furnace What is the combustible floor base made out of? - -Fiberglass Closet installation require close attention to be paid to _____ transmission - ...

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  • August 10, 2023
  • 7
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers

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  • nateice gas furnace
  • top questions amp answers 100

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PassPoint02

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NATE/ICE Gas Furnace, Top Questions &
Answers. 100% Accurate. Verified.

What type of furnace needs a combustible floor base? - ✔✔-A downflow furnace



What is the combustible floor base made out of? - ✔✔-Fiberglass



Closet installation require close attention to be paid to _____ transmission - ✔✔-noise



On a call for heat the circuit board will look for? - ✔✔-Closed thermal switches:

* High limit control

* Flame roll-out

* Secondary limits

* Open pressure switch



The inducer will be energized for the _____ perious - ✔✔-pre-purge



The pressure switch will close proving the _____ operation - ✔✔-inducer



the gas valve will open for a trial period of _____ to _____ seconds - ✔✔-5 to 7



A flame failure during a call for heat will be detected within _____ seconds - ✔✔-0.8



products of combustion include - ✔✔-* Carbon dioxide

* Nitrogen

* Water vapor

* Heat

, too much primary air can cause the flame to _____ _____ the burner - ✔✔-lift off



Inshot burners should produce a hard, loud flame that is light _____ in color and has a little or no _____
tips - ✔✔-* Blue

* Yellow



Earlier burners were made of cast iron; today they are made of _____ - ✔✔-Sheet metal



Individual burners must be mounted in correct alignment to ensure adequate _____. - ✔✔-carry-over



yellow tips mean - ✔✔-incomplete combustion



_____ _____ ignition systems are on the entire time the burner is firing - ✔✔-intermittent duty



interrupted duty ignition systems are energized _____ the main burner is stable and then de-energized -
✔✔-until



how far should the thermocouple go into the flame? - ✔✔-5/8 to 1/2



if a system is undersized, it will result in? - ✔✔-long run time during the heating season and the lack of
temperature control



if a system is oversized, it will result in? - ✔✔-short cycling curing the heating season



the _____ is the most widely used measure of a furnace's heating efficiency. - ✔✔-AFUE



the AFUE refers only to the unit's _____ efficiency, not its electricity usage nor its system efficiency. -
✔✔-fuel

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