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NATE Core practice bundled exams 2023 with 100% correct answers
NATE Core practice exam 2023 with 100% correct answers NATE Air Distribution exam 2023 with 100% correct answers
[Show more]NATE Core practice exam 2023 with 100% correct answers NATE Air Distribution exam 2023 with 100% correct answers
[Show more]Ch. 1-1 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 correct answersd) very important 
 
Ch. 1-2 It is important to be _______ in filling ...
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Add to cartCh. 1-1 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 correct answersd) very important 
 
Ch. 1-2 It is important to be _______ in filling ...
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 answersA: Liquid flood-back to the compress...
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Add to cartLow 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 answersA: Liquid flood-back to the compress...
what type of meter is most appropriate when a tech must determine voltage? correct answersvoltmeter 
 
temp at which moisture begins to condense on objects? correct answersdew point 
 
btu's equivalent to 1 watt hour 
A. 3.418 
B. 3.413 
C. 3.213 
D. 4.314 correct answers3.413 btu 
 
electrical tes...
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Add to cartwhat type of meter is most appropriate when a tech must determine voltage? correct answersvoltmeter 
 
temp at which moisture begins to condense on objects? correct answersdew point 
 
btu's equivalent to 1 watt hour 
A. 3.418 
B. 3.413 
C. 3.213 
D. 4.314 correct answers3.413 btu 
 
electrical tes...
a (Centrifugal) correct answersWhich of the following compressors are considered a dynamic compressor? 
 
a. Centrifugal 
b. Reciprocating 
d. Rotary 
c. Scroll 
 
b (Superheated vapor / sub cooled liquid) correct answersWhat is the condition of the refrigerant as it enters and leaves the condensing...
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Add to carta (Centrifugal) correct answersWhich of the following compressors are considered a dynamic compressor? 
 
a. Centrifugal 
b. Reciprocating 
d. Rotary 
c. Scroll 
 
b (Superheated vapor / sub cooled liquid) correct answersWhat is the condition of the refrigerant as it enters and leaves the condensing...
A judgment correct answersAn opinion is 
 
Easy to use correct answersWhich of the following is a future of a product or service 
 
A truth correct answersA fact is 
 
Saves time correct answersWhich of the following is a benefit of a product or service 
 
DOT correct answersWhich of the following a...
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Add to cartA judgment correct answersAn opinion is 
 
Easy to use correct answersWhich of the following is a future of a product or service 
 
A truth correct answersA fact is 
 
Saves time correct answersWhich of the following is a benefit of a product or service 
 
DOT correct answersWhich of the following a...
formula to convert celsius to fahrenheit correct answersF = (1.8 x C) + 32 
 
formula to convert fahrenheit to celsius correct answersC = .56 (F - 32) 
 
specific heat correct answersthe amount of heat required to raise 1 lb of a substance 1 degree fahrenheit 
 
sensible heat correct answersIs the h...
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Add to cartformula to convert celsius to fahrenheit correct answersF = (1.8 x C) + 32 
 
formula to convert fahrenheit to celsius correct answersC = .56 (F - 32) 
 
specific heat correct answersthe amount of heat required to raise 1 lb of a substance 1 degree fahrenheit 
 
sensible heat correct answersIs the h...
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 answersB: Cooling mode 
 
Heat pumps can provide both heating in the winter and cooling in the summer. In which mode is th...
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Add to cartCharging 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 answersB: Cooling mode 
 
Heat pumps can provide both heating in the winter and cooling in the summer. In which mode is th...
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 char...
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Add to cartA 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 char...
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 answersC: 78% 
 
Many pre-1992 furnaces have efficiencies around _______. 
 
 A: 10% 
 
 B: 40...
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Add to cartSince 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 answersC: 78% 
 
Many pre-1992 furnaces have efficiencies around _______. 
 
 A: 10% 
 
 B: 40...
What are the five basic components to any schematic? correct answers1. A power supply 
2. A path for the power 
3. A load or component that operates from the power. 
4. A switch or component that interrupts the power to the load. 
5. A legend or key that explains what the various symbols and abbrevi...
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Add to cartWhat are the five basic components to any schematic? correct answers1. A power supply 
2. A path for the power 
3. A load or component that operates from the power. 
4. A switch or component that interrupts the power to the load. 
5. A legend or key that explains what the various symbols and abbrevi...
Generally, vibration eliminators in piping should be installed: 
 
 A: At a 45 degree angle 
 
 B: At a 90 degree angle 
 
 C: Perpendicular to the compressor crankshaft 
 
 D: Parallel to the compressor crankshaft correct answersD: Parallel to the compressor crankshaft 
 
If you purchased ten filt...
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Add to cartGenerally, vibration eliminators in piping should be installed: 
 
 A: At a 45 degree angle 
 
 B: At a 90 degree angle 
 
 C: Perpendicular to the compressor crankshaft 
 
 D: Parallel to the compressor crankshaft correct answersD: Parallel to the compressor crankshaft 
 
If you purchased ten filt...
What electro-mechanical control would you use on a cap tube or automatic expansion valve system to maintain the space temperature? correct answersC: A thermostatic control 
 
Open motors are designed to operate at a given temperature rise as indicated on the motor nameplate. What does this mean? cor...
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Add to cartWhat electro-mechanical control would you use on a cap tube or automatic expansion valve system to maintain the space temperature? correct answersC: A thermostatic control 
 
Open motors are designed to operate at a given temperature rise as indicated on the motor nameplate. What does this mean? cor...
What kind of heat transfer does not include solids, or fluids correct answersRadiation 
 
Capillary tubing should be only cut to length using correct answersTriangular or knife edge file 
 
Before beginning any electrical check out procedure, what step should be taken after equipment is disconnected...
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Add to cartWhat kind of heat transfer does not include solids, or fluids correct answersRadiation 
 
Capillary tubing should be only cut to length using correct answersTriangular or knife edge file 
 
Before beginning any electrical check out procedure, what step should be taken after equipment is disconnected...
Class A correct answersOrdinary Extinguisher 
 
Class B correct answersLiquid Extinguisher 
 
Class C correct answersElectrical Extinguisher 
 
Asphyxiation causes what? correct answersNausea, Dizziness, Heart Irregularities, and Unconciousness 
 
Ladder must be at what dimensions in relation to a h...
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Add to cartClass A correct answersOrdinary Extinguisher 
 
Class B correct answersLiquid Extinguisher 
 
Class C correct answersElectrical Extinguisher 
 
Asphyxiation causes what? correct answersNausea, Dizziness, Heart Irregularities, and Unconciousness 
 
Ladder must be at what dimensions in relation to a h...
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 answersB: 212 degrees 
 
Zero pounds gauge corresponds on the absolute scale to: 
 
 A: 144 
 
 B: 212 
 
 C: 14.7 
 
 D: zero ...
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Add to cartThe 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 answersB: 212 degrees 
 
Zero pounds gauge corresponds on the absolute scale to: 
 
 A: 144 
 
 B: 212 
 
 C: 14.7 
 
 D: zero ...
On a new oil furnace installation, the oil pump pressure is found to be 50 PSI. which of the following actions should be taken? 
 
a. Increase the pump pressure. 
b. Add a new fuel filter. 
c. Reduce the pump pressure. 
d. No action needed. correct answersA 
 
After installation and 20 min. of run t...
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Add to cartOn a new oil furnace installation, the oil pump pressure is found to be 50 PSI. which of the following actions should be taken? 
 
a. Increase the pump pressure. 
b. Add a new fuel filter. 
c. Reduce the pump pressure. 
d. No action needed. correct answersA 
 
After installation and 20 min. of run t...
A condensing unit should be mounted on a slab that is level to: 
 
A: Allow any accumulated water to evenly run out of the cabinet 
 
B: Increase airflow through the fin area 
 
C: Prevent the unit from tipping over 
 
D: Make certain any top discharge air blows straight up correct answersA 
 
A sim...
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Add to cartA condensing unit should be mounted on a slab that is level to: 
 
A: Allow any accumulated water to evenly run out of the cabinet 
 
B: Increase airflow through the fin area 
 
C: Prevent the unit from tipping over 
 
D: Make certain any top discharge air blows straight up correct answersA 
 
A sim...
A particular cleaning solution is made by mixing a liquid cleaning concentrate with water. the instructions specify mixing 1 quart of concentrate with 14 quarts of water. a tech wishes to prep 60 quarts of mixed cleaning solution. how many quarts of cleaning concentrate will be needed. - 4 
 
A tech...
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Add to cartA particular cleaning solution is made by mixing a liquid cleaning concentrate with water. the instructions specify mixing 1 quart of concentrate with 14 quarts of water. a tech wishes to prep 60 quarts of mixed cleaning solution. how many quarts of cleaning concentrate will be needed. - 4 
 
A tech...
<question: The density of air is 
 
 A: How much air weighs per cubic foot 
 
 B: How much volume one pound of air occupies 
 
 C: The ratio of the weight of water to that of the same volume of water 
 
 D: The ratio of the amount of water vapor contained in a cu. ft. of air to the amount of m...
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Add to cart<question: The density of air is 
 
 A: How much air weighs per cubic foot 
 
 B: How much volume one pound of air occupies 
 
 C: The ratio of the weight of water to that of the same volume of water 
 
 D: The ratio of the amount of water vapor contained in a cu. ft. of air to the amount of m...
On an R-22 system, line diameters and lengths are typically specified for a vapor pressure drop that does not exceed what? correct answers6-7PSI or 6F 
 
What is the primary purpose of using flux when soldering copper or brass parts? correct answersPrevent Oxidation 
 
The water that results from a ...
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Add to cartOn an R-22 system, line diameters and lengths are typically specified for a vapor pressure drop that does not exceed what? correct answers6-7PSI or 6F 
 
What is the primary purpose of using flux when soldering copper or brass parts? correct answersPrevent Oxidation 
 
The water that results from a ...
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