HVAC Heating final exam Review Questions And Answers Rated 100% Correct!!

Water boils at ______degrees celsius - Answer-100 In what direction does a vapor exert force - Answer-All How many BTUs are required to convert 27 pounds of 6°F Ice to 1398°F Steam - Answer-51,300 What is an integrated furnace control (IFC)? - Answer-An electronic module to control the operation of the furnace. Which of these are good insulators? - Answer-Air, Fiberglass What component transfers heat to room air and is a barrier that separates combustion gases from room air in a gas fired furnace/ - Answer-Heat exchanger Water freezes at ______degrees fahrenhei - Answer-32 The standard stmospheric pressure at sea level is _____. - Answer-29.92" Hg An orifice meters the quantity of gas to the burner as well as directs the gas stream. - Answer-True The function of the auxiliary limit switch in heating applications is to________________ - Answersense room return air temperature and interrupt the burner operation when the temperature becomes too hot. The primary purpose of the gas valve is to: (select all that apply) - Answer-start and stop the flow of gas A manometer is used to - Answer-measure gas pressure Heat that causes no change in thermostat reading is called - Answer-latentThe specific gravity of Natural gas is 0.60 therefore it is ______ than air and ________ when released in air - Answer-lighter, rises Water boils at ______degrees fahrenheit - Answer-212 An ice machine can produce a 25 pound block of 10°F ice every 15 minutes. If the supply water to the ice machine is 75°F, how many total BTUs are removed from all the water in one day? - Answer- 475,200 An orifice in a natural gas spud will be ________ the orifice in a propane spud - Answer-larger than A Btu is defined as - Answer-the amount of heat required to raise one pound of water one degree fahrenheit Natural gas is composed of 90 to 95% - Answer-Methane