It is important to the HVACR technician to understand the changes ...

[wenmo]

It is important to the HVACR technician to understand the changes of state of matter because:
 
  A) The refrigerant recovery process requires a technician to know which state the matter is in to ensure that only like refrigerants are put into a recovery container.
  B) Technicians are required to mix refrigerants to attain proper pressures and temperatures when charging refrigeration systems.
  C) NATE certification exams require a good understanding of the periodic table of elements.
  D) The cooling and heating process requires a change of state of matter in some form.

Question 2

Properties of matter that determine how chemicals react to one another:
 
  A) Are known as physical properties of matter. B) Are tested in pressures above atmospheric.
  C) Are known as chemical properties of matter. D) Are tested in pressures below atmospheric.

[Brenm]

Answer to Question 1

D

Answer to Question 2

C

[wenmo]

YES! Correct, THANKS for helping me on my review

[robbielu01]

Thanks for the timely response, appreciate it