Nate gas furnace - Study guides, Class notes & Summaries

NATE - Gas & Heat Test Questions and Answers 100% Solved What precautions are required when mounting any gas furnace on a wood platform in an attic? None The gas control valve may be damaged if exposed to an inlet pressure above: 14 in. W.C. How many elbows and joints should a vent connector have: As few as possible to reduce resistance of flue gases What conditions, if any may a technician route the exhaust of the furnace into the exhaust vent of the water heater? Under no conditio...

NATE Gas Heating Exam Latest Update 2024...

NATE Heat Pump Exam Questions With Correct Answers Updated 2024/2025 (VERIFIED A+) The water that results from a defrost cycle of an air to air heat pump(runoff) must? -Ans Drain off and away from the outdoor coil. Why must the runoff be drained off and away from the outdoor coil? -AnsExcessive ice can build up on the bottom of the coil and can reduce capacity. What is the component that reduces sound transmission and prevents water leaks of a package heat pump installed on a roof? -Ans Cur...

HVAC NATE Heat Pump Exam Questions With Correct Answers Updated 2024/2025 (Graded A+) What is the primary purpose of using flux when soldering copper or brass parts? -Ans Prevent Oxidation The water that results from a defrost cycle of an air to air heat pump(runoff) must? -Ans Drain off and away from the outdoor coil. Why must the runoff be drained off and away from the outdoor coil? -AnsExcessive ice can build up on the bottom of the coil and can reduce capacity. What is the component th...

NATE Gas Heating Exam Verified Questions and answers 2023 Latest Update Since 1992, the United States Department of Energy has required that all furnaces sold and installed from that date on must have an AFUE of no less than: A: 70% B: 75% C: 78% D: 80% - correct answer C: 78% Many pre-1992 furnaces have efficiencies around . A: 10% B: 40% C: 60% D: 80% - correct answer C: 60% Today, furnaces with AFUE ratings greater than are available. A: 85% B: 90% C: 100% D: 110% - correct ...

NATE Gas Heating Exam Questions and Answers 100% Pass Since 1992, the United States Department of Energy has required that all furnaces sold and installed from that date on must have an AFUE of no less than: A: 70% B: 75% C: 78% D: 80% -Answer-C: 78% Many pre-1992 furnaces have efficiencies around _______. A: 10% B: 40% C: 60% D: 80% -Answer-C: 60% Today, furnaces with AFUE ratings greater than _____ are available. A: 85% B: 90% C: 100% D: 110% -Answer-B: 90% A thermocouple is ...

NATE Gas Heat Practice Guide (2022/2023) Rated A+ What precautions are required when mounting any gas furnace on a wood platform in an attic? None The gas control valve may be damaged if exposed to an inlet pressure above what? 14 inch W.C. How many elbows and joints should a vent connector have? As few as possible to reduce resistance of flue gases. Under what conditions, if any may the technician route the exhaust of the furnace into the exhaust vent of the water heater: Under no condition...

NATE Gas Heating Exam/ Questions with Verified Answers. Terms like: A yellow burner flame is usually caused by: A: A weak ignitor B: Lack of sufficient air C: Low gas pressure D: Too much primary air - Answer: B: Lack of sufficient air A lifting burner flame is usually caused by: A: A new ignitor that has not been broken in B: High gas pressure and/or too much primary air C: Low gas pressure and/or not enough primary air D: Blockage in the flue - Answer: B:...

Nate Formulas Fan law: Pulley size Formula - answerDPm X RPMm = DPf X RPMf DP=Diameter of Pulley f=Fan or Driven m=Motor or Driver Actual Brake HP of a motor - answerBHP = HPnp( Amps/FLA) np = Name plate Synchronizes speed of a motor - answer7200 / # of poles Convert Velocity pressure (Vp) into Feet Per Minute (FPM) - answerFPM = 4005(sqrt of Vp) Convert V(velocity) into CFM - answerCFM = Asqft X Vfpm Asqft = Area of the ductwork in square feet Vfpm = Velocity in Feet Per Minute Tp(to...