A residential A/C system that cools in summer and heats in winter by reversing the flow of ...

A residential A/C system that cools in summer and heats in winter by reversing the flow of refrigerant is called a:
 
  A) Stand-alone A/C system B) Heat pump
  C) Window unit D) PTAC system

 Q. 2

Before changing the blade in an electric circular saw, you should:
 
  A) Work quickly to reduce the chance of the saw starting.
  B) Place a screwdriver down in the motor section to prevent the saw from starting.
  C) Unplug the saw.
  D) Put on heavy gloves.

 Q. 3

How can maintaining an orderly shop be beneficial?
 
  A) There is less productivity when using required tools or materials.
  B) Less time is wasted searching for required tools or materials.
  C) There is more frustration when searching for required tools or materials.
  D) Less time is spent using required tools or materials.