Answers - Position and Warning Systems

Fill in the Blanks

1. current, unsatisfactory
2. blow, damage, control
3. zero
4. slip, skid
5. all the way
6. 20
7. weight, wheels (main wheels)

True or False

1. false
2. true
3. true
4. false
5. false

Knowledge Application

1. The control unit
2. By a warning light
3. The system is off or has failed
4. An audible alert and/or a warning light
5. A horn or other aural device, and a red warning light or lights

Multiple Choices

1. a
Antiskid generators measure the rotational speed of the wheel and any changes in the rotational speed. A signal is generated that varies in frequency or signal strength according to the speed of the wheel.

2. a
In an antiskid brake system, the skid control valves are located downstream of the brake control valves. When the skid control generator senses an impending wheel skid, it sends a signal to the skid control box which in turn sends a signal to the skid control valve. The skid control valve takes the brake system pressure supplied to it and bypasses some of it back to the system return line. The amount of pressure the skid control valve allows to go to the brakes should not allow a wheel skid to occur.

3. c
An antiskid system makes use of electrical components, such as the skid control generator and the skid control box, as well as hydraulic components, such as the skid control valves. This combination of electrical and hydraulic components makes the antiskid an electrohydraulic system.

4. c
The pilot can turn off the operation of the antiskid system by a switch in the cockpit.

5. b
Take-off Warning Systems will monitor the take-off position of critical control surfaces and systems. These include stabilizer trim-, trailing edge flap-, leading edge device-, and speedbrake-positions

6. a
The takeoff configuration warning system is armed when the aircraft is on the ground and one or more thrust levers are advanced to the takeoff position.

7. c
Airspeed indicators are sensitive instruments which measure the difference between the pitot and static pressures.

8. b
The operation of the angle-of-attack indicating system is based on detection of differential pressure at a point where the airstream is flowing in a direction that is not parallel to the true angle of attack of the aircraft.

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