HVAC Heating final exam Review 2024 Questions and Answers

HVAC Heating final exam Review 2024 Questions and Answers Water boils at ______degrees celsius - Correct Answer ️️ -100 In what direction does a vapor exert force - Correct Answer ️️ -All How many BTUs are required to convert 27 pounds of 6°F Ice to 1398°F Steam - Correct Answer ️️ -51,300 What is an integrated furnace control (IFC)? - Correct Answer ️️ -An electronic module to control the operation of the furnace. Which of these are good insulators? - Correct 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/ - Correct Answer ️️ -Heat exchanger Water freezes at ______degrees fahrenhei - Correct Answer ️️ -32 The standard stmospheric pressure at sea level is _____. - Correct Answer ️️ -29.92" Hg An orifice meters the quantity of gas to the burner as well as directs the gas stream. - Correct Answer ️️ -True The function of the auxiliary limit switch in heating applications is to________________ - Correct Answer ️️ -sense 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) - Correct Answer ️️ - start and stop the flow of gas A manometer is used to - Correct Answer ️️ -measure gas pressure Heat that causes no change in thermostat reading is called - Correct Answer ️️ -latent The specific gravity of Natural gas is 0.60 therefore it is ______ than air and ________ when released in air - Correct Answer ️️ -lighter, rises Water boils at ______degrees fahrenheit - Correct 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? - Correct Answer ️️ -475,200 An orifice in a natural gas spud will be ________ the orifice in a propane spud - Correct Answer ️️ -larger than A Btu is defined as - Correct Answer ️️ -the amount of heat required to raise one pound of water one degree fahrenheit