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NATE Exam: Core Essentials Questions & 100% Verified Answers 2025/2026, Exams of Refrigeration and Air Conditioning

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 (very important)

Typology: Exams

2024/2025

Available from 06/19/2025

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NATE Exam: Core Essentials Questions &
100% Verified Answers | Latest Update | Already
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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
๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ: d (very important)
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. concise
d. all of the above
๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ: d (all of the above: clear, complete, concise)
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NATE Exam: Core Essentials Questions &

100% Verified Answers | Latest Update | Already

Graded A+

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 ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : d (very important) 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. concise d. all of the above ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : d (all of the above: clear, complete, concise)

When explaining to a customer that you have adjusted the system charge, which of the following terms is most appropriate? a. Freon b. Gas c. Juice d. Refrigerant ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : d (Refrigerant) Listening carefully to what a customer is telling you ____. a. can help you diagnose the problem b. is a waste of time c. is not necessary d. often will only confuse you ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : a (can help you diagnose the problem) When you arrive at a service call and meet the customer, you should ____. a. ask questions first, then listen to what the customer has to say b. listen to the customer first, then ask questions c. avoid discussion with the customer d. remind the customer that you are the professional and get on with your work

b. 1,200 CFM c. 1,600 CFM d. 2,400 CFM ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : c (1,600 CFM) What is the cross-sectional area of a 10-in round metal duct? a. 79 in b. 200 in c. 314 in d. 418 in Note: Area of a circle = ฯ€ x radius^ ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : a ( 79 in 2 ) How fast does air with a velocity pressure of 0.20 in. w.g. move through a round duct? a. 400 ft/min b. 1,200 ft/min c. 1,600 ft/min d. 1,800 ft/min Note: Velocity = 4005 x (the square root of velocity pressure)

๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : d (1,800 ft/min) How fast does air with a velocity pressure of 0.20 in w.g. move through a square duct? a. 400 ft/min b. 1,200 ft/min c. 1,600 ft/min d. 1,800 ft/min Note: Velocity = 4005 x (the square root of velocity pressure) ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : d (1,800 ft/min) Customers depend on you to be ____. a. honest b. loyal c. patient d. all of the above ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : d (all of the above: honest, loyal, patient) Before leaving a service call, you should be sure to ____. a. ask the customer for referrals

A flaring tool is used to ____. a. make a mechanical joint in tubing b. measure pipe diameters c. remove burrs from piping d. solder tubing without the use of coupling ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : a (make a mechanical joint in tubing) A swaging tool is used to ____. a. cut copper tubing b. make a mechanical joint in tubing c. remove burrs from piping d. solder tubing without the use of couplings ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : d (solder tubing without the use of couplings) What is one of the advantages of a glass-stem thermometer? a. It is very accurate b. It is very durable c. It comes with a digital readout d. Non of the above

๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : a (It is very accurate) In discussing human comfort, the temperature most commonly referred to is ____. a. dew point b. dry-bulb c. wet-bulb d. Fahrenheit ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : b (dry-bulb) A sling psychrometer uses two glass-stem thermometers. One measures dry-bulb, and the other measures ____. a. dew point b. enthalpy c. relative humidity d. wet-bulb ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : d (wet-bulb) A standard refrigeration manifold uses what type of element to measure pressure? a. Bellows b. Bourdon tube

a. inches of mercury b. microns c. psia d. psig ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : b (microns) Which of the following is not a method of leak detection? a. Soap bubbles b. Electronic c. Micronic d. Ultrasonic ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : c (Micronic) To prevent the release of refrigerant to the atmosphere while removing it from a system, what type of equipment must be used? a. Recovery machine b. Recycling machine c. Reclaim machine d. Vacuum pump ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : a (Recovery machine)

An anemometer uses a small fan blade to measure ____. a. air pressure b. air velocity c. air volume d. static pressure ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : b (air velocity) What is one of the advantages of using silver brazing rods for copper-to-copper joints? a. A lower melting temperature is required b. A propane torch is normally used c. No flux is required d. No nitrogen purge is needed ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : c (No flux is required) "Housekeeping" includes ____. a. disposal of waste b. fire prevention and protection c. proper storage of materials d. all of the above ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : d (all of the above)

๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : a (contain information about personal protective equipment) When should oxygen be used in a refrigeration system? a. To clear a restriction in the line b. To pressurize for leak-testing c. To purge lines for brazing d. Never ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : d (Never) Which of the following classifications of fire extinguishers should be used for electrical fires? a. A b. B c. C d. D ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : c (Class A is an "ordinary" fire that involves the burning of wood, paper, or textile products, extinguishing agent: water. Class B is a fire that contains oil, grease, paint, varnish, or other chemicals, extinguishing agent: foam. Class C is an electrical fire, extinguishing agent: carbon dioxide.)

Which of the following categories could be considered a hazardous atmosphere in a confined space? a. Asphyxiating b. Flammable c. Toxic d. All of the above ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : d (All of the above: asphyxiating, flammable, toxic) Which of the following best describes an asphyxiating atmosphere? a. Low oxygen level b. Presence of ammonia c. Presence of carbon monoxide d. Presence of nitrogen ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : a (Low oxygen level) If a ladder is placed against a wall that is 20 ft tall, what is the proper distance away from the wall for the base of the ladder? a. 3 ft b. 4 ft c. 5 ft

a. When current travels through a ground path other than the neutral b. When the circuit is overloaded c. When there is a short circuit d. All of the above ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : a (When current travels through a ground path other than the neutral) Proper lockout/tagout procedures state that locks placed on a lockout device may be removed ____. a. by anyone on the job site b. only by the person who installed the locks c. only after all fuses have been replaced d. only when the equipment is grounded ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : b (only by the person who installed the locks) A natural cooling process produced by moisture on the skin changing to low-pressure steam is called ____. a. conduction b. convection c. evaporation d. radiation

๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : c (evaporation) During the heating season, human comfort can be enhanced without changing the temperature of the air by ____. a. adding moisture b. reducing moisture c. increasing air filtration d. increasing air speed ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : a (adding moisture) During the cooling season, dampers on bypass humidifiers should be ____. a. completely closed b. completely open c. set at 25% d. set at 50% ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : a (completely closed) All matter can exist as a ____. a. liquid b. solid

b. latent c. sensible d. super ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : b (latent) The amount of heat (Btu) needed to raise the temperate of 1 lb of a substance 1ยฐF is called the ____ heat of the substance. a. absolute b. latent c. sensible d. specific ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : d (specific) The latent heat of fusion is the amount of energy required to change 1 lb of a substance from the ____ phase to the ____ phase without changing its temperature. a. liquid, vapor b. liquid, solid c. solid, vapor d. vapor, liquid ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : b (liquid, solid)

At 32ยฐF, 1 lb of ice can be changed to 1 lb of water by adding ____ Btu. a. 32 Btu b. 44 Btu c. 144 Btu d. 970 Btu ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : c ( 144 Btu) At 212ยฐF, 1 lb of water can be changed to 1 lb of steam by adding ____ Btu. a. 32 Btu b. 44 Btu c. 144 Btu d. 970 Btu ๐Ÿ—ธ๐Ÿ—ธ๐Ÿ—ธ : d ( 970 Btu) When liquid and vapor phases of a substance exist together, and no more liquid can vaporize without more energy being added, the vapor is said to be ____. a. saturated b. stabilized c. subcooled d. superheated