Study guides, Class notes & Summaries

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 CORRECT ANSWER B: Cooling mode 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 D: Emergency heating mode CORRECT ANSWER A: Heating mode Which of the following components is exclusive t...

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%

NATE Final Exam #2 With 100% Correct Answers 2023|2024 verified solution

NATE Final Exam #2 With 100% Correct Answers 2023|2024 verified solution

TEST BANK FOR NATE Final Exam #1and 2 Questions and answers 2023|2024 PERFECT solution

NATE Final Exam #1 and 2 Questions and answers 2023|2024 PERFECT solution

NATE Final Exam #1 Questions and answers 2023 solution manual

NATE Final Exam #1 Questions and answers 2023 solution manual

NATE Gas Heating Exam 50 Questions with Complete Solutions

NATE Gas Heating Exam with Complete Solutions 100% Verified Graded A+ In a modern gas furnace, the component that separates the combustion gases from the supply air is the ______. a. gas valve b. heat exchanger c. inducer fan d. plenum box - Correct Answer b (heat exchanger) What type of furnace moves warm air through the conditioned space without a fan? a. Gravity b. Horizontal c. Lowboy d. Upflow - Correct Answer a (Gravity) Furnace heat exchangers generally are made of ______. ...

NATE Gas Furnace Service 117 Questions with Correct Answers 100% Verified What is the typical load rating of the branch circuit over-current protection for a residential gas furnace? - Correct Answer 25 Amp What is recommended for a pressurization leak test of fuel gas pipe? - Correct Answer Compressed air When selecting a replacement indoor blower motor, Which criteria should be included? - Correct Answer Motor horsepower Induced draft blowers in direct vent condensing furnaces pull c...

NATE - Gas & Heat 139 Questions with Complete Solutions 3/8 to 1/2 inch of the end of the thermocouple: - Correct Answer Should be enveloped by the pilot flame A "cross break" made on all sides of any rectangular section of metal duct will: - Correct Answer Increase rigidity and reduced vibration A control string is defined as two or more switch contacts connected in a circuit, or set of circuits, to control a load. In order to troubleshoot a load controlled by a control string, the te...