- Study guides, Revision notes & Summaries

file Which pressure in a TEV is opening pressure? - bulb pressure What effect does a low refrigerant charge have on reversing valve operations? - It increases the chance that the reversing valve will not be able to transfer properly When adding a heat pump to an existing fossil-fuel furnace, an installer must do all of the following except ______. - Make sure that the new number of fins per inch of the new coils equals that of the replaced coils What is the purpose of a receiver? - It sto...

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15 pages

Written in 2024/2025

Grade A+

EXAMCAFE

Which component pumps refrigerant through the system and raises the vapor temperature? a. Accumulator b. Compressor c. Condenser d. Evaporator - b (Compressor) How are hermetic compressor motors cooled? a. With air drawn around the compressor shell by the condenser fan b. With water circulated through tubing wrapped around the compressor shell c. With suction vapor drawn from the evaporator d. With a combination of air and water - c (With suction vapor drawn from the evaporator)

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16 pages

Written in 2024/2025

Grade A+

EXAMCAFE

Nate Air Conditioning And Heat Pump Exam Script 2025/2026 Questions With Answers Graded A+

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9 pages

Written in 2024/2025

Grade A+

EXAMCAFE

A technician is working on a heat pump with a capacitor start-capacitor run compressor. On initial startup, the compressor hums momentarily and then shuts down on internal overload... - The problem is too great a pressure difference on the compressor A step down transformer has a rating of 40 VA. Its primary voltage is 120V with a secondary voltage of 24V. This transformer must not be connected to a load above a maximum current draw of... - 1.7 amps A bright red or orange glow from the re...

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11 pages

Written in 2024/2025

Grade A+

EXAMCAFE

Nate Exam Package Deal Questions And Verified Detailed Answers | 100% Guaranteed Pass | Already Graded A+

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8 items

JOSHCLAY

NATE Exam: Air Conditioning and Heat Pumps 2024/2025 Exam Questions and Answers | A+ Score Assured Which of the following factors affects a customer's level of comfort? a. Air movement b. Humidity c. Temperature d. All of the above -

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41 pages

Written in 2024/2025

Grade A+

JOSHCLAY

Cross breaking sheet metal duct will: a. Weaken the duct and prevent contamination. b. Stiffen the duct and reduce noise. c. Increase the cost of the duct and prevent joint splitting. d. Improve the appearance of the duct and prevent zinc cracking. - correct answer B Which of the following is one of the most common disadvantages of using flex duct in comparison to sheet metal duct? a. Less pressure drop. b. More fittings required. c. More pressure drop. d. Increased installation ...

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7 pages

Written in 2024/2025

Grade A+

brittton

The primary function of a reversing valve is to... - correct answer Switch between heating and cooling A typical 4 way reversing valve has 3 ports on one side of the valve body, and a single port on the opposite side of the valve body. To what is this single port connected? - correct answer The discharge line Of the three ports on one side of the reversing valve's body, to what is the center port connected? - correct answer The accumulator If a heat pump system is low on charge, t...

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4 pages

Written in 2024/2025

Grade A+

brittton

A good evacuation of a refrigerant circuit to remove non-condensable will help ensure: - correct answer Higher efficiency and Capacity. A condensing unit should be mounted on a slab that is level to allow: - correct answer Accumulated water to evenly run from the cabin. Low airflow over a residential split system air conditioning evaporator can cause: - correct answer Liquid flood-back to the compressor. Which of the following is the correct sequence of work: - correct answer Attach...

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9 pages

Written in 2024/2025

Grade A+

brittton

A system is supplied from the factory with charge of 5 pounds 10 ounces for a 15 foot line set. The line set is 25 feet long. The manufacturer's instruction sheet specifies 0.6 ounces of refrigeration to be added for each added foot of refrigerant line set length. What is the total refrigerant charge for the system? A. 6 ounces B. 5 pounds C. 5 pounds 10 ounces D. 6 pounds - correct answer D. 6 pounds 15ft - 25ft = 10ft x .6 = 6 ounces 5 pounds + 10 ounces + 6 ounces 5 pounds + 1...

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27 pages

Written in 2024/2025

Grade A+

brittton

The Fahrenheit scale is based on boiling water at sea level at what temperature? A: 459 degrees B: 212 degrees C: 180 degrees D: 100 degrees - correct answer B: 212 degrees Zero pounds gauge corresponds on the absolute scale to: A: 144 B: 212 C: 14.7 D: zero - correct answer C: 14.7 Hidden heat in refrigeration work is referred to as: A: Intensity of heat B: Latent heat C: Heat a thermometer can "sense" D: Cold - correct ...

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19 pages

Written in 2024/2025

Grade A+

brittton

d (very important) - correct answer The ability to utilize all types of communication skills is ____ to the HVACR technician. a. not as important as "hands-on" technical skills b. somewhat important c. unimportant d. very important d (all of the above: clear, complete, concise) - correct answer It is important to be ____ in filling out service orders so that office staff, other technicians, and customers will know what work you completed on the job. a. clear b. complete c. ...

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33 pages

Written in 2024/2025

Grade A+

brittton

Low airflow over a residential split system air conditioning evaporator can cause A: Liquid flood-back to the compressor B: A decrease in compression ratio C: An increase in suction line superheat D: Oil logging in the evaporator - correct answer A: Liquid flood-back to the compressor Which of the following is the correct sequence of work? A: Attach gauge manifold, recover refrigerant, replace filter core, evacuate the system, recharge the system. B: Recover refri...

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19 pages

Written in 2024/2025

Grade A+

brittton

Fans are classified according to____. - correct answer THE DIRECTION OF THE AIR FLOW THROUGH THE IMPELER In an axial fan, air flow is ________ to the shaft of the impeller. In centrifugal fan, air flow is___________to the shaft. - correct answer PARALEL, PERPENDICULAR Name the three main types of axial fans___________________________ - correct answer PROPELLER, TUBEAXIAL, VANEAXIAL Name three common categories of centrifugal fans , based on impeller designs._____________. - corre...

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14 pages

Written in 2024/2025

Grade A+

brittton

A good evacuation of a refrigerant circuit to remove non-condensables will help insure: A.) higher condensing temperatures B.) higher suction pressures C.) low suction line pressure drop D.) higher efficiency and capacity - correct answer D.) higher efficiency and capacity A condensing unit should be mounted on a slab that is level to: A.) allow an accumulated water to evenly run out of the cabinet B.) increase airflow through the fin area C.) prevent the unit from tipping over D.) m...

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10 pages

Written in 2024/2025

Grade A+

brittton

NATE Exam: Air Conditioning and Heat Pumps Question with correct Answers Which of the following factors affects a customer's level of comfort? a. Air movement b. Humidity c. Temperature d. All of the above - ANSWER-d (All of the above: air movement, humidity, temperature)

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31 pages

Written in 2023/2024

Grade A+

smartgrades

Nate Core Exams || Nate Exams {Bundle Compilation}

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27 items

smartgrades