Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Pneumatics > GPAC > Flashcards

GPAC Flashcards

1
Q

How much air can the gpac produce?

A

4.15m 3/min at 25-50 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the 3 outlet purposes?

A

Breathing air purification systems

Tornado reverse thrust test outlet

Four tool outlet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What speed is the gpac limited to?

A

40 mph on road

20 mph off road

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What does the oil tight chassis prevent?

A

Environmental contamination

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the rpm ranges?

A

2000rpm off load running speed

2800 rpm full load

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What type of compressor does the GPAC use?

A

Model 45 screw compressor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How is the engine driven

A

Via a coupling

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the working pressure?

A

10.0 bar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What temperature is the discharge?

A

90 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the output of the compressor dependant on?

A

Screw length and profile

Form of discharge port

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Why is oil injected into the compressor?

A 
Absorb heat
Prevent metallic contact 
Lubricate roller bearings 
Provide a seal between rotors and housing
Trap fine particulates
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is full load?

A

Pressure from proportional controller insufficient to overcome cracking pressure or inlet valve

Overcomes spring pressure in engine speed actuator - engine remains at max speed

Minimum pressure valve ensures sufficient pressure for lubrication of compressor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is partial load?

A

Pressure from proportional controller rises-

Overcomes cracking pressure of inlet valve and valve partially closes

Overcomes spring pressure in the engine speed actuator - speed is reduced

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is off load?

A

Pressure from proportional controller rises which overcomes spring pressure of inlet valve. This closes and overcomes spring pressure win engine speed actuator and engine speed is reduced to idle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the valve that controls both the volume of air and rate of compression within the pneumatic system?

A

Proportional controller

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What method is used to return lubricating oil from the separator to the compressor?

A

Pressure gradient

17
Q

What is the purpose of the 90 degree deflector?

A

Force the oil into a centrifugal movement which will separate it

18
Q

What controls the operation of the combination valve?

A

Temperature control

19
Q

What component prevents control and regulating devices from freezing up?

A

Defrost unit

20
Q

How far from a building must the gpac be?

A

1.5 m and max slope is 15 degrees

Pneumatics (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions