HVAC Practice Test

Take this free practice test to see how prepared you are for an HVAC certification exam.

1.	Two locations where a cold air return should be installed:
	Open area of wall and low to the ground.
	Behind appliances and high on the wall.
	Open area of wall and high on the wall.
	Behind appliances and low to the ground.

2.	Which of the following is a law of thermodynamics:
	Heat is a form of matter.
	Heat moves toward a place with higher intensity.
	Heat moves toward a place with lower intensity.
	Heat moves toward a place with a higher temperature.

3.	Sensible heat describes _________________________.
	How fast heat will travel.
	The quantity of heat.
	The volume of heat.
	How hot something feels.

4.	Latent heat measures _______________________.
	The temperature of heat in a substance.
	The quantity of heat in a substance.
	The velocity of heat in a substance.
	The heat potential of a substance.

5.	Latent heat is measured in ____________________.
	Degrees Celsius, F ahrenheit and Kelvin
	International System of Units
	British Thermal Units
	Board of Trade Unit

6.	If 1 pound of water warms to 60 degrees F from 55 degrees F, what btu of latent heat will it have absorbed?
	2.5
	5
	10
	15

7.	What is the amount of heat energy required to evaporate 1 pound of water?
	370 btu
	570 btu
	770 btu
	970 btu

8.	In an air conditioning and refrigeration system, what occurs in an evaporator?
	The refrigerant absorbs the latent heat.
	The refrigerant evaporates latent heat.
	Latent heat is condensed.
	Latent heat is released.

9.	In an air conditioning and refrigeration system, what occurs in a condenser?
	The refrigerant absorbs the latent heat.
	The refrigerant releases the latent heat.
	Latent heat is pressurized.
	Latent heat is increased.

10.	In a sealed system, pressure and temperature _________________.
	are inversely proportional
	go in opposite directions up and down
	are equal
	follow each other up and down

11.	Which of the following is not a type of compressor?
	Lateral
	Reciprocating
	Rotary
	Screw
	Centrifugal

12.	In Fahrenheit, the boiling point of water is _____________.
	100 degrees
	112 degrees
	212 degrees
	221 degrees

13.	To change Fahrenheit to Celsius, which formula is used?
	C =(F+32)� 1.8
	C=(F-32) x 1.8
	C=(F-32) � 1.8
	C= (F-32)+1.8

14.	Which of the following is not a method by which heat may be transferred from a warmer substance to a colder substance?
	Conduction
	Retraction
	Convection
	Radiation

15.	What btu of heat is required to raise 1 pound of ice 1 degree F when the temperature is below 32 degrees F?
	.25
	.5
	1
	1.5

16.	What btu of heat is required to raise 1 pound of steam 1 degree F above the temperature of 212 degrees F?
	.25
	.5
	1
	1.5

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

18.	Ice exerts pressure ________________.
	Upwards
	Laterally
	Downwards
	In all directions

19.	Pressure is usually measured in ___________.
	Pounds per square foot
	Pressure per square foot
	Pounds per square inch
	Pressure per square inch

20.	Atmospheric pressure, at sea level, is 14.7 psia.
	True
	False

21.	When one rises into the atmosphere, the atmospheric pressure decreases by 1 psi for every_________________.
	2,343 feet
	3,334 feet
	2,500 feet
	5,280 feet

22.	Vaporization can be increased by _____________ the pressure on a liquid.
	Increasing
	Equalizing
	Reducing

23.	Every mechanical refrigeration system has __________ different pressure levels.
	2
	3
	4
	5

24.	Pressure on the high pressure side of a mechanical refrigeration unit is called _______________.
	suction pressure
	discharge or head pressure
	differential l pressure
	absolute pressure

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

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