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welcome to hvac exam practice test our topic today is practice test use the link in the description to download the app on the app store for free practice tests number one which of the following causes a change in the state of a material without a change in temperature a sensible heat b superheat see latent heat deregular heat the correct answer is sea latent heat explanation heat which causes a change of state without a change in temperature is known as latent heat an example of latent heat is water changing to ice or vice versa latent heat is the heat released or absorbed by a body or a thermodynamic system during a process that occurs without a change in temperature number two what is the movement of heat through space called air radiation b conduction c convection the atomic reactance the correct answer is air radiation explanation radiation is the transfer of energy through space by way of electromagnetic waves the same laws that govern the transfer of light govern the rad