Brainscape's Knowledge GenomeTM

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


See full index

73 Memory Items And Limitations > Hydraulics > Flashcards

Hydraulics Flashcards

1
Q

The PTU operates automatically when all of the following conditions exist:

A
  • system B ENGINE-DRIVEN pump hydraulic pressure drops below a certain limit
  • Airborne
  • 0°<flaps<15° (700)
    Flaps>0° (800)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

The purpose of the PTU is:

A

Supply the additional volume of hydraulic fluid needed to operate the autoslats and leading edge flaps and slats at the normal rate when system B engine-driven hydraulic pump volume is inoperative.

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

If a system A electric-motor leak occurs how much quantity will be maintained?

A

It will steadily decrease to zero and all pressure will be lost.

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

If a leak occurs in either pump of system B how much quantity will be maintained?

A

It decreases until approximately zero.

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

Positioning ALTERNATE FLAPS to ARM will do what?

A
  1. Arm the standby electric hydraulic pump
  2. Close the trailing edge flaps bypass valve
  3. Arms the alternate flap position switch
  4. Allows standby system to power the leading edge flaps, slats, and thrust reversers.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

If a leak occurs in the standby system reservoir the quantity decreases to:

A

Zero

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

The LOW QUANTITY light illuminates when the standby reservoir is approximately:

A

Zero

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

What are the two manual ways to activate the standby hydraulic system?

A
  1. FLT CONTROL switch to STBY RUD
  2. ALTERNATE FLAPS to ARM
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the purpose of the landing gear transfer unit?

A

Supply the volume of hydraulic fluid needed to raise the landing gear at
the normal rate when system A engine-driven pump volume is lost.

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

System B engine-driven pump supplies volume of hydraulic fluid needed to operate the LGTU when all of these conditions exist:

A
  1. Airborne
  2. # 1 engine RPM drops below a limit value
  3. Landing gear lever positioned UP
  4. Either main landing gear not up and locked.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

With fluid at the top of the standpipe in system B, the fluid remaining in the system will be sufficient for:

A

Power Transfer Unit operation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

With a standby leak, system B continues to operate normally, however system B reservoir will decrease and stabilize at:

A

Approximately 70%

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

Will a leak in system B affect standby hydraulic pressure?

A

No

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

What’s powered by system B?

A
  1. Flight controls
  2. Elevator feel
  3. Flight spoilers (two on each wing)
  4. LE flaps and slats
  5. Normal brakes
  6. No. 2 thrust reverser
  7. Autopilot B
  8. Alternate NWS
  9. LGTU
  10. Auto-slats
  11. Yaw damper
  12. Trailing edge flaps
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How does the PTU work?

A

Uses hydraulic system A pressure to power a hydraulic motor-driven pump which pressurizes the hydraulic system B hydraulic fluid.

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

Positioning either FLT CONTROL switch to STBY RUD will do what?

A
  1. Activates the standby electric pump
  2. Opens standby rudder valve
  3. Closes same side flight control SOV
  4. Allows stby sys to power rudder and TR
  5. Deactivates flight control LOW PRESSURE light
  6. Illuminates STBY RUD ON, MASTER CAUTION, and FLT CONT lights.
17
Q

If system A has a leak in the engine-driven pump or it’s associated lines, a standpipe will maintain how much fluid quantity?

A

Approximately 20%

18
Q

System A components

A
  1. Flight controls
  2. Elevator feel
  3. Flight spoilers (two on each wing)
  4. Ground spoilers
  5. Alternate brakes
  6. No. 1 TR
  7. A/P A
  8. NWS
  9. LDG gear
  10. PTU
19
Q

What are the two automatic ways to activate the standby hydraulic system?

A

1.
- loss of system A or B and
- flaps >0°
- airborne or wheel speed >60 kt and
- FLT CONTROL switch ON

  1. The main PCU FFM trips
20
Q

Automatic operation of the standby system will do what?

A
  1. Activates the standby electric-motor driven pump
  2. Opens the standby rudder SOV
  3. Allows the standby system to power the rudder and thrust reversers
  4. Illuminates the STBY RUD, MASTER CAUTION, and FLT CONT lights.

73 Memory Items And Limitations (5 decks)

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