NATE Exam Core Essentials questions and answers correctly answered 2023

NATE Exam Core Essentials questions and answers correctly answered 2023d (very important) 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) 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 d (Refrigerant) 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 a (can help you diagnose the problem) 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 b (listen to the customer first, then ask questions) 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 (1,600 ft3) What is the volume of a room that measures 10 ft by 20 ft with an 8-ft ceiling? a. 800 ft3 b. 1,600 ft3 c. 2,400 ft3 d. 3,200 ft3 b (1,200 CFM) What is the CFM requirements for an 1,800-ft2 house with 8-ft ceilings, if five air changes per hour are needed? a. 400 CFM b. 1,200 CFM c. 1,600 CFM d. 2,400 CFM c (1,600 CFM) What is the CFM requirement for an 2,400-ft2 house with 8-ft ceilings, if five air changes per hour are needed? a. 400 CFM b. 1,200 CFM c. 1,600 CFM d. 2,400 CFM a (79 in2) What is the cross-sectional area of a 10-in round metal duct? a. 79 in2 b. 200 in2 c. 314 in2 d. 418 in2 Note: Area of a circle = π x radius^2 d (1,800 ft/min) 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) 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) d (all of the above: honest, loyal, patient) Customers depend on you to be ____. a. honest b. loyal c. patient d. all of the above c (demonstrate system operation and describe basic maintenance procedures to the customer) Before leaving a service call, you should be sure to ____. a. ask the customer for referrals b. collect payment in cash if possible c. demonstrate system operation and describe basic maintenance procedures to the customer d. try to sell the customer an equipment upgrade d (All of the above: it can cut hard or soft drawn copper; it leaves no metal shavings to contaminate the system; it produces a clean, square cut.) What is the advantage of using a tube cutter to cut copper pipe? a. It can cut hard or soft drawn copper b. It leaves no metal shavings to contaminate the system c. It produces a clean, square cut d. All of the above a (soft drawn copper) Spring-type benders may be used on ____. a. soft drawn copper b. hard drawn copper c. all copper pipe d. steel pipe a (make a mechanical joint in tubing) 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 d (solder tubing without the use of couplings) 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 a (It is very accurate) 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 b (dry-bulb) In discussing human comfort, the temperature most commonly referred to is ____. a. dew point b. dry-bulb c. wet-bulb d. Fahrenheit d (wet-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 b (Bourdon tube) A standard refrigeration manifold uses what type of element to measure pressure? a. Bellows b. Bourdon tube c. Diaphragm d. Spring c (30 in. Hg to 350 psig) What is the pressure range of a standard compound gauge on a refrigerant manifold? a. 0 to 350 psig b. 0 to 500 psig c. 30 in. Hg to 350 psig d. 30 in. Hg to 500 psig d (Vacuum pump) What is the best tool for removing moisture and non-condensibles from a system before adding refrigerant? a. Manifold gauge b. Micron analyzer c. Recovery machine d. Vacuum pump b (microns) A vacuum gauge reads pressure in ____. a. inches of mercury b. microns c. psia d. psig c (Micronic) Which of the following is not a method of leak detection? a. Soap bubbles b. Electronic c. Micronic d. Ultrasonic a (Recovery machine) 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 b (air velocity) An anemometer uses a small fan blade to measure ____. a. air pressure b. air velocity c. air volume d. static pressure c (No flux is required) 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 d (all of the above) "Housekeeping" includes ____. a. disposal of waste b. fire prevention and protection c. proper storage of materials d. all of the above b (Goggles) What type of eye protection should you wear when drilling overhead? a. Face shield b. Goggles c. Side shields d. Spectacles b (DOT) What agency regulates cylinders and chemicals transported in a service vehicle? a. ASHRAE b. DOT c. EPA d. OSHA a (contain information about personal protective equipment) Material safety data sheets ____. a. contain information about personal protective equipment b. do not provide recommendations regarding emergency procedures c. should be kept in a safe place off-site d. should be read after any chemical products have been used d (Never) 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 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 classifications of fire extinguishers should be used for electrical fires? a. A b. B c. C d. D d (All of the above: asphyxiating, flammable, toxic) 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 a (Low oxygen level) 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