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Nfi Test Questions With 100% Correct Answers.

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NFI TEST QUESTIONS WITH 100% CORRECT ANSWERS. Which fuel type has a lower ignition temperature? Propane ignites between 920-1,120 degrees Fahrenheit while natural gas ignites at 1,150 degrees Fahrenheit What is the significance of the differences in specific gravity between natural gas and propane? Propane falls and collects in lower areas of appliance or room while natural gas rises into the atmosphere What added safety feature is on all unvented gas appliances that is not found on vented appliances? Oxygen depletion system (ODS) that works with safety shutoff valve to stop fuel flow in event of low oxygen levels Which is a chemical compound with a strong pungent odor that occurs in incomplete or interrupted combustion? Aldehydes Which of the following must be present in order for natural gas or propane to ignite? Heat

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