A tool used for checking system pressures, evacuating systems, recovering systems, and charging systems is:
A) A digital thermometer. B) A vacuum pump.
C) A recovery cylinder. D) A gauge manifold.
Question 2
Why can a compound gauge NOT indicate when a system is properly evacuated?
A) Compound gauges don't read vacuum.
B) It can only show inches, and there are 25,400 microns in one inch.
C) The Bourdon tube will suck completely flat.
D) The gas volume in the Bourdon tube will prevent the system from pulling down.