Author Question: One operating advantage of fixed-restriction metering devices over expansion valves is: A) Can be ... (Read 43 times)

kaid0807 · **on:** Jul 24, 2018

One operating advantage of fixed-restriction metering devices over expansion valves is:

A) Can be used with low starting torque compressor motors.
B) Higher operating efficiency.
C) Improved system control.
D) Easier to adjust.

Question 2

What type of systems normally use crankcase pressure regulators?

A) Commercial refrigeration applications with evaporator temperatures above 40F
B) Any refrigeration system with a compressor that has a positive-pressure oil pump
C) Primarily comfort cooling applications
D) Low-temperature refrigeration applications such as walk-in and reach-in freezers