A self contained recovery device:

A self contained recovery device:
 
  A) Can only be used on systems that are sold by independent distributors.
  B) Relies on the system the refrigerant is being recovered from for its operation.
  C) Is used with systems that are not connected to the power grid.
  D) Does not rely on the system the refrigerant is being recovered from for its operation.

 Q. 2

To transfer heat to the surrounding air, a convector primarily depends on _____.
 
  a. a circulating fan
  b. a centrifugal blower
  c. gravity
  d. radiation

 Q. 3

What is the purpose of the heat anticipator used in a mechanical low voltage thermostat?
 
  A) To keep the system on longer
  B) To anticipate when the room will get cold and bring the heat on early
  C) To sense the room temperature
  D) To reduce the temperature swing