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Flashcards in Millwright Third Year Compressors Deck (197)
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1

Does a liquid ring compressor need an aftercooler?

No

2

What does an axial compressor use to remove fluid?

Baffle or Cyclone Separator

3

On a Screw Compressor or a Lobe Blower, Labyrinth Seals prevent oil from getting back to the:

rotor(s)

4

On a Lobe Blower most of the clearance is on the:

Timing Gear side

5

Lobe Rotors have lands that are also known as:

Wear Strips

6

Before you take off gears:

Match mark them

7

Vein, Screw, and Liquid ring compressors:

20-2300 CFM, 30-100psi, can draw 29" ov vacuum

8

cone and port plates in a liquid ring compressor are for:

gas entry and exit

9

baffles, and cyclone separators remove

fluid

10

Liquid Ring compressors need oil:

for the bearing areas only

11

The inlet port on a liquid ring compressor is:

larger than the discharge port

12

air pressure entering a liquid ring compressor must be:

below atmospheric pressure if first stage

13

on a liquid ring compressor a heat exchanger:

cools bearing oil

14

Clean fluid is admitted through a pipe over the lantern ring to

direct cooling oil to the packing

15

Bypassing High Pressure back to the intake is a method of unloading a:

liquid ring compressor

16

bearing caps should be:

1/4-1/3 full of grease

17

Lantern ring aligns with

fluid water

18

1/16"

belt tension

19

If the amount of liquid in a liquid ring compressor is altered so is the:

amount of gas

20

proper seal face may have a

preload*

21

Mechanical efficiency:

actual torque delivered by the motor compared to the theoretical in a percentage without any friction loss

22

Volumetric efficiency

the volume that comes out of the discharge compared with the volume that enters the motor inlet

23

overall efficiency=

mechanical efficiency X volumetric efficiency

24

Overall efficiency is

how much power you get out of a motor compared to how much power you put into it.

25

speed in a hydraulic motor is

flow rate + Volume

26

The bigger the fluid chambers the:

slower the engine

27

pressure depends on: (2)

load and displacement

28

the maximum pressure rating is maximum recommended inlet pressure for continuous operation for a:

specified time

29

bias piston must have:

2-400 psi on it at all times to return the pump to full stroke

30

load sensor reduces flow during a change in load and during metering of flow through the:

flow control valve