When refrigerant lines are installed under a poured concrete slab they are protected from physical ...

When refrigerant lines are installed under a poured concrete slab they are protected from physical harm
 
  A) by the concrete itself
  B) by the foam insulation around the refrigerant lines
  C) with a chase or conduit
  D) by a covering of tar and pitch

 Q. 2

The location for a rooftop unit will be partly determined by
 
  A) the clearest path available for sliding the unit across the roof
  B) the easiest place to cut a hole in the roof
  C) The distance that a crane can reach over the edge of the building
  D) the availability of anchor points for attaching the drag winch