Texas HVAC Contractor Exam And
Answers.
Density - Answer Mass per unit of volume
Specific Gravity - Answer the ratio of the mass of a certain volume of a liquid or a solid
compared to the mass of an equal volume of water.
Enthalpy - Answer The total amount of heat in a substance
Conduction - Answer the flow of heat from a warmer object to a colder object.
Convection - Answer The movement of heat from one place to another by way of liquid of gas
latent heat - Answer Heat that brings about a change of state with no change in temperature
sensible heat - Answer Heat that causes a change in temperature
1 ton - Answer 12,000 Btu/hr
Heat of compression - Answer As a gas is compressed into a smaller volume (as in a
compressor), its pressure and temperature rise. This is due to the work (energy) added to the
gas by compression. The energy added is often termed the heat of compression.
critical temperature - Answer the highest temperature at which the substance may be
liquefied, regardless of the pressure applied to it
Answers.
Density - Answer Mass per unit of volume
Specific Gravity - Answer the ratio of the mass of a certain volume of a liquid or a solid
compared to the mass of an equal volume of water.
Enthalpy - Answer The total amount of heat in a substance
Conduction - Answer the flow of heat from a warmer object to a colder object.
Convection - Answer The movement of heat from one place to another by way of liquid of gas
latent heat - Answer Heat that brings about a change of state with no change in temperature
sensible heat - Answer Heat that causes a change in temperature
1 ton - Answer 12,000 Btu/hr
Heat of compression - Answer As a gas is compressed into a smaller volume (as in a
compressor), its pressure and temperature rise. This is due to the work (energy) added to the
gas by compression. The energy added is often termed the heat of compression.
critical temperature - Answer the highest temperature at which the substance may be
liquefied, regardless of the pressure applied to it
