Question

Vacuum strength is rated in terms of

A. torque.
B. horsepower.
C. cm or in. of water lift.
D. rheostat capacity



Update: I just completed the Pennfoster exam and it was C. cm or in. of water lift.

Answer 1

The answer would be C. Vacuum strength is measured in terms of cm or in. water lift. It will have a units of pressure and among the choices it is only option C that represents pressure. A vacuum is an empty space. It contains no air or any substance. It will have a pressure less than the atmospheric pressure.