NATE CORE COMPREHENSIVE TEST 2026
QUESTIONS WITH ANSWERS GRADED A+
◉ Sublimation is the process of what? Answer: It is the process that
takes place when a solid changes directly into a vapor, without first
passing through the liquid state.
◉ From most to least, list the amount of energy in each of the three
phases of matter. Answer: 1. Gases. / 2. Liquids. / 3. Solids.
◉ What is thermal expansion? Answer: it is when solids and liquids
expand with increase in temperature.
◉ What is diffusion? Answer: It is the continuous motion of the
molecules in a liquid or gas.
◉ What is enthalpy? Answer: It is the total heat energy contained in
a substance, which includes both sensible heat and latent heat.
◉ What is mass? Answer: It is the amount of matter in something.
◉ What is weight? Answer: It is a measure of the force that gravity
exerts on something.
,◉ Which density does the HVACr industry use? Answer: Weight
density.
◉ What is weight density stated as? Answer: Ib/Ft^3
◉ Temperature can affect what property of matter? Answer: Density.
◉ What is the inverse if density called? Answer: Specific volume.
◉ Specific volume is stated as what? Answer: Ft^3/lb
◉ Most of the world uses what system of measurement? Answer:
Metric system. (SI)
◉ What temperature does water freeze at? Answer: 32 degrees
Fahrenheit or 0 degrees Celsius.
◉ What is the conversion equation from Celsius to Fahrenheit?
Answer: 1.8 x Degrees Celsius + 32
◉ How do you convert Fahrenheit to Celsius? Answer: Degress
Fahrenheit - .8
, ◉ What is the point at which heat no longer exists at? Answer:
Absolute zero.
◉ What does Fahrenheit have to be converted to in order to get
absolute temperature? Answer: Rankine (R).
◉ What does Celsius have to be converted to in order to get absolute
temperature? Answer: Kelvin (K).
◉ What is Charles law? Answer: At constant pressure, the volume of
a gas is directly proportional to its absolute temperature.
◉ What is Boyle's Law? Answer: The volume of a gas decreases
when the pressure is increased.
◉ What is Dalton's Law? Answer: The total pressure of a gas mixture
is equal to the sum of the pressure that each gas would exert
independently.
◉ At 212 Degrees F, 1 pound of water can be changed to 1 pound of
steam by adding how much Btu? Answer: 970 Btu.
QUESTIONS WITH ANSWERS GRADED A+
◉ Sublimation is the process of what? Answer: It is the process that
takes place when a solid changes directly into a vapor, without first
passing through the liquid state.
◉ From most to least, list the amount of energy in each of the three
phases of matter. Answer: 1. Gases. / 2. Liquids. / 3. Solids.
◉ What is thermal expansion? Answer: it is when solids and liquids
expand with increase in temperature.
◉ What is diffusion? Answer: It is the continuous motion of the
molecules in a liquid or gas.
◉ What is enthalpy? Answer: It is the total heat energy contained in
a substance, which includes both sensible heat and latent heat.
◉ What is mass? Answer: It is the amount of matter in something.
◉ What is weight? Answer: It is a measure of the force that gravity
exerts on something.
,◉ Which density does the HVACr industry use? Answer: Weight
density.
◉ What is weight density stated as? Answer: Ib/Ft^3
◉ Temperature can affect what property of matter? Answer: Density.
◉ What is the inverse if density called? Answer: Specific volume.
◉ Specific volume is stated as what? Answer: Ft^3/lb
◉ Most of the world uses what system of measurement? Answer:
Metric system. (SI)
◉ What temperature does water freeze at? Answer: 32 degrees
Fahrenheit or 0 degrees Celsius.
◉ What is the conversion equation from Celsius to Fahrenheit?
Answer: 1.8 x Degrees Celsius + 32
◉ How do you convert Fahrenheit to Celsius? Answer: Degress
Fahrenheit - .8
, ◉ What is the point at which heat no longer exists at? Answer:
Absolute zero.
◉ What does Fahrenheit have to be converted to in order to get
absolute temperature? Answer: Rankine (R).
◉ What does Celsius have to be converted to in order to get absolute
temperature? Answer: Kelvin (K).
◉ What is Charles law? Answer: At constant pressure, the volume of
a gas is directly proportional to its absolute temperature.
◉ What is Boyle's Law? Answer: The volume of a gas decreases
when the pressure is increased.
◉ What is Dalton's Law? Answer: The total pressure of a gas mixture
is equal to the sum of the pressure that each gas would exert
independently.
◉ At 212 Degrees F, 1 pound of water can be changed to 1 pound of
steam by adding how much Btu? Answer: 970 Btu.
