HVAC Practice Test (2025 Current). Fully Explained Answers.

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HVAC Excellence
part of the Esco Group, is a standards organization and leading authority on certification in the HVACR industry.

The questions are based on industry standards and offer a comprehensive coverage of the fundamental subject matter found on most HVACR certification exams.

The HVACR Practice Test Kit provides:

assessment of broad based HVACR knowledge
practice in the various specialty areas
a good opportunity for practicing test taking skills and learning the subject matter

Summary of Typical HVACR Certification Exams:

What: HVACR exams are part of the certification process for HVACR technicians which identifies the scope and level of a technician's competency in core and specialty areas.

Who: HVACR professionals who wish to become certified in various HVACR specialties

Where: HVACR certification exams are typically administered at various testing centers, schools and other locations throughout the United States.

When: There are various times throughout the year so check with the exam provider for information.

Why: Certification programs improve technical competency and safety allowing technicians to demonstrate competency and earn more money.

Type: Multiple choice, in both computer-based and paper/pencil formats.

Time: Time varies. The average time is 2 hours.

Language: English

Cost: Depending on the subject and organization, it typically costs between $25 - $150 per actual certification exam.

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1.	Two locations where a cold air return should be installed:
		a. Open area of wall and low to the ground.
		b. Behind appliances and high on the wall.
		c. Open area of wall and high on the wall.
		d. Behind appliances and low to the ground.
Incorrect answer. Please choose another answer.



2.	Which of the following is a law of thermodynamics:
		a. Heat is a form of matter.
		b. Heat moves toward a place with higher intensity.
		c. Heat moves toward a place with lower intensity.
		d. Heat moves toward a place with a higher temperature.
Incorrect answer. Please choose another answer.



3.	Sensible heat describes _________________________.
		a. How fast heat will travel.
		b. The quantity of heat.
		c. The volume of heat.
		d. How hot something feels.
Incorrect answer. Please choose another answer.



4.	Latent heat measures _______________________.
		a. The temperature of heat in a substance.
		b. The quantity of heat in a substance.
		c. The velocity of heat in a substance.
		d. The heat potential of a substance.
Incorrect answer. Please choose another answer.



5.	Latent heat is measured in ____________________.
		a. Degrees Celsius, F ahrenheit and Kelvin
		b. International System of Units
		c. British Thermal Units
		d. Board of Trade Unit
Incorrect answer. Please choose another answer.



6.	If 1 pound of water warms to 60 degrees F from 55 degrees F, what btu of latent heat will it have absorbed?
		a. 2.5
		b. 5
		c. 10
		d. 15
Incorrect answer. Please choose another answer.



7.	What is the amount of heat energy required to evaporate 1 pound of water?
		a. 370 btu
		b. 570 btu
		c. 770 btu
		d. 970 btu
Incorrect answer. Please choose another answer.



8.	In an air conditioning and refrigeration system, what occurs in an evaporator?
		a. The refrigerant absorbs the latent heat.
		b. The refrigerant evaporates latent heat.
		c. Latent heat is condensed.
		d. Latent heat is released.
Incorrect answer. Please choose another answer.



9.	In an air conditioning and refrigeration system, what occurs in a condenser?
		a. The refrigerant absorbs the latent heat.
		b. The refrigerant releases the latent heat.
		c. Latent heat is pressurized.
		d. Latent heat is increased.
Incorrect answer. Please choose another answer.



10.	In a sealed system, pressure and temperature _________________.
		a. are inversely proportional
		b. go in opposite directions up and down
		c. are equal
		d. follow each other up and down
Incorrect answer. Please choose another answer.



11.	Which of the following is not a type of compressor?
		a. Lateral
		b. Reciprocating
		c. Rotary
		d. Screw
		e. Centrifugal
Incorrect answer. Please choose another answer.



12.	In Fahrenheit, the boiling point of water is _____________.
		a. 100 degrees
		b. 112 degrees
		c. 212 degrees
		d. 221 degrees
Incorrect answer. Please choose another answer.



13.	To change Fahrenheit to Celsius, which formula is used?
		a. C =(F+32)÷ 1.8
		b. C=(F-32) x 1.8
		c. C=(F-32) ÷ 1.8
		d. C= (F-32)+1.8
Incorrect answer. Please choose another answer.



14.	Which of the following is not a method by which heat may be transferred from a warmer substance to a colder substance?
		a. Conduction
		b. Retraction
		c. Convection
		d. Radiation
Incorrect answer. Please choose another answer.



15.	What btu of heat is required to raise 1 pound of ice 1 degree F when the temperature is below 32 degrees F?
		a. .25
		b. .5
		c. 1
		d. 1.5
Incorrect answer. Please choose another answer.



16.	What btu of heat is required to raise 1 pound of steam 1 degree F above the temperature of 212 degrees F?
		a. .25
		b. .5
		c. 1
		d. 1.5
Incorrect answer. Please choose another answer.



17.	A day-ton of refrigeration is the amount of refrigeration produced by melting 1 ton of ice at a temperature of 32 degrees F in 24 hours.
		True
		False
Incorrect answer. Please choose another answer.



18.	Ice exerts pressure ________________.
		a. Upwards
		b. Laterally
		c. Downwards
		d. In all directions
Incorrect answer. Please choose another answer.



19.	Pressure is usually measured in ___________.
		a. Pounds per square foot
		b. Pressure per square foot
		c. Pounds per square inch
		d. Pressure per square inch
Incorrect answer. Please choose another answer.



20.	Atmospheric pressure, at sea level, is 14.7 psia.
		True
		False
Incorrect answer. Please choose another answer.



21.	When one rises into the atmosphere, the atmospheric pressure decreases by 1 psi for every_________________.
		a. 2,343 feet
		b. 3,334 feet
		c. 2,500 feet
		d. 5,280 feet
Incorrect answer. Please choose another answer.



22.	Vaporization can be increased by _____________ the pressure on a liquid.
		a. Increasing
		b. Equalizing
		c. Reducing
Incorrect answer. Please choose another answer.



23.	Every mechanical refrigeration system has __________ different pressure levels.
		a. 2
		b. 3
		c. 4
		d. 5
Incorrect answer. Please choose another answer.



24.	Pressure on the high pressure side of a mechanical refrigeration unit is called _______________.
		a. suction pressure
		b. discharge or head pressure
		c. differential l pressure
		d. absolute pressure
Incorrect answer. Please choose another answer.



25.	The exertion of pressure on a substance with a constant temperature increases its volume in proportion to the increase in pressure.
		True
		False
Incorrect answer. Please choose another answer.