Author Question: Elements are: A) The forces of velocity pressure and density upon a substance. B) Pressure and ... (Read 39 times)

sarasara · **on:** Jul 27, 2018

Elements are:

A) The forces of velocity pressure and density upon a substance.
B) Pressure and temperature.
C) Naturally occurring chemicals.
D) Force and pressure.

Question 2

An advantage of open-drive compressors is that:

A) They are generally less expensive than comparable semihermetic compressors.
B) The motor and compressor can be replaced separately.
C) They require no type of regular maintenance.
D) They are smaller and more compact than hermetic compressors.