A saddle piercing valve: (Multiple Choice)

A saddle piercing valve:
 
  A) Is the most common type of refrigeration service valve used on commercial refrigeration systems.
  B) Is used to pierce the saddle on a manual service valve whose stem has been rounded off so the technician can still get a reading.
  C) Should be installed on all systems at the start of a service call.
  D) Is used to gain access to a sealed system.

 Q. 2

To adjust cabinets so that they are plumb and level, carpenters use _____.
 
  a. shims
  b. expansion bolts
  c. adjustable hangers
  d. double bevels

 Q. 3

One advantage of digital meters is:
 
  A) They are preferable for fluctuating readings.
  B) There is no need to interpret the scale.
  C) They do not require batteries like analog meters do.
  D) They cannot be damaged by improper use.