System thermostat - Study guides, Class notes & Summaries

thermostat Ans: Is a temperature dep endent valve that opens and closes according to the engine coolant temperature to regulate the flow of coolant through the radiator and back to the engine Coolant Pump Ans: Are mechanically controlled devices that circulate coolant through the radiator and back to the engine. Radiator Ans: Is a liquid to air heat exchanger that reduces coolant temperature by transferring heat from the radiator to the outside air Degas bottle Ans: Is attached to t...

NATE Heat Pump Exam Questions and Answers Latest Updated 2024/2025 (GRADED A+) Charging a heat pump with refrigerant is best accomplished in the mode. A: Heating mode B: Cooling mode C: Defrost mode D: Emergency heating mode: B: Cooling mode 2. Heat pumps can provide both heating in the winter and cooling in the summer. In which mode is the heat pump more efficient? A: Heating mode B: Cooling mode C: Defrost mode NATE Heat Pump Exam Questions and Answers Latest Updated 2024/2025 (GRA...

An air-to-air heat pump has many of the same components as an air conditioning system. The major difference is that a heat pump also has an - Answer-Reversing valve What is the difference between "demand defrost" and "timed defrost"? - Answer-Demand defrost happens only when needed and timed defrost is based on time/temperature. The thermostat that controls the auxiliary electric heat according to the outdoor temperature is called the; - Answer-Outdoor ambient thermostat The outdoor te...

NATE Heat Pump Exam Questions and Answers Latest Updated 2024/2025 (GRADED A+) Charging a heat pump with refrigerant is best accomplished in the mode. A: Heating mode B: Cooling mode C: Defrost mode D: Emergency heating mode: B: Cooling mode 2. Heat pumps can provide both heating in the winter and cooling in the summer. In which mode is the heat pump more efficient? A: Heating mode B: Cooling mode C: Defrost mode NATE Heat Pump Exam Questions and Answers Latest Updated 2024/2025 (GRA...

1. An air-to-air heat pump has many of the same components as an air conditioning system. The major difference is that a heat pump also has a (an); - Answer-C: reversing valve. 2. What is the difference between "demand defrost" and "timed defrost?" - Answer-D: demand defrost only happens when needed, and time defrost is on timed temperature 3. The thermostat that controls the auxiliary electric heat according to the outdoor temperature is called the; - Answer-C: outdoor ambient thermost...

NATE FINAL EXAM 2/ LATEST UPDATE EXAM 2024 WITH 100% CORRECT DETAILED ANSWERS/A+ GRADE ASSURED Which of the following components is energized first after an intermittent ignition gas furnace calls for heat? A: Induced draft motor B: Pilot valve C: Blower motor D: Gas valve - Correct Answer-A To have a system automatically switch to heating or cooling as the load changes, the thermostat: A: System switch should be in auto B: System switch should be in off C: Syste...

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 Heat Pump Exam Questions With Correct Answers Latest Updated 2024/2025 (GRADED A+) Which of the following components is exclusive to the heat pump? A: Condenser B: Oil separator C: Reversing valve D: Accumulator: C: Reversing valve 4. Which of the following airflow rates is the most reasonable for a heat pump system operating in the heating cycle? A: 200 cfm per ton B: 300 cfm per ton C: 400 cfm per ton 3 / 15 D: 450 cfm per ton: D: 450 cfm per ton 5. During the heat pump's coo...

HVAC Gas Heat Certification Exam Prep (Latest 2024/ 2025 Update) 100% Correct Questions and Verified Answers| Grade A Q: Why is excess air supplied to all gas-burning appliance burners? Answer: to ensure that there is enough air all all times. Q: The purpose of a gas regulator at a gas burning appliance is to? Answer: B. decreases the pressure to the burner Q: Ture or False: All gas valves snap open and closed. Answer: False Q: Which of the followin...

1. An air-to-air heat pump has many of the same components as an air conditioning system. The major difference is that a heat pump also has a (an); : C: reversing valve. 2. What is the difference between "demand defrost" and "timed defrost?" : D: demand defrost only happens when needed, and time defrost is on timed temperature 3. The thermostat that controls the auxiliary electric heat according to the outdoor temperature is called the; : C: outdoor ambient thermostat. 4. The out...