In rotary screw compressors, ________ supplies lubrication to the ...

[mrsjacobs44]

In rotary screw compressors, ________ supplies lubrication to the bearings, oil to the mechanical seal, and hydraulic power to position the slide valve.
 
  A) the prelube pump B) the main oil pump
  C) the oil manifold D) rotor injection

Question 2

Residential central heating and cooling systems became popular in:
 
  A) The mid 1970s. B) The late 1950s. C) The late 1970s. D) The late 1960s.

[missalyssa26]

Answer to Question 1

C

Answer to Question 2

D

[mrsjacobs44]

Thanks

[missalyssa26]

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