Aircraft Systems Part 2(Wheels & Tyres, Anti-skid, Pressurisation)

Question 1

The most common type of tyre for light and large jet transport aeroplanes?

Answer 1

Ribbed

Question 2

The purpose of a chine type tyre?

Answer 2

To deflect water away from rear mounted fuselage engines

Question 3

The type of tyre that can prevent nosewheel shimmy?

Answer 3

Marstrand tyre

Question 4

The principle operation of brakes?

Answer 4

To convert kinetic energy into heat energy by rubbing two different surfaces together

Question 5

What type of brake system:

This type of brake employs two stationary shoes attached to floating back plate positioned within a rotating brake drum, which is splined or attached to the wheel hub.

Answer 5

Internal expanding shoe brakes

Question 6

What type of brake system:

This system is employed on smaller aeroplanes not requiring excessive braking action, like tailwheel type aeroplanes to prevent nosing over.

Answer 6

Expander tube brakes

Question 7

The three effect that the anti-skid system provide:

Answer 7

1. a shorter ground roll
2. reduced tyre wear and tendency for tyre blow-out
3. better control over the aircraft during landing

Question 8

What type of anti-skid function:

This becomes operational when wheel rotation slows down but has not yet come to a stop.

Answer 8

Normal skid control

Question 9

What type of anti-skid function:

This causes the brake to be fully released when a wheel locks, something which can easily occur if a wheel hits a patch of ice, and will be activated if the normal skid control does not prevent the wheel from reaching a full skid.

Answer 9

Locked wheel skid control

Question 10

What type of anti-skid function:

This prevents the brakes form being applied during approach to land, even though the brake pedals may be depressed, thus preventing the wheels from making contact with the ground with brakes engaged.

Answer 10

Touchdown protection

Question 11

What type of anti-skid function:

This is system that monitors the anti-skid control system. in the event of a system failure it will automatically allow full manual use of the brake system.

Answer 11

Fail safe protection

Question 12

What type of system:

This system is used on large transport type aeroplanes where two or more wheels are fitted to a bogie. High rotational wheel speeds and their weight impose tremendous gyroscopic forces during gear retraction and are capable of snapping the torque links or leg assembly if the wheels are still rotating. This system will engage if wheels are selected in the up position

Answer 12

Autobrakes

Question 13

In the case of light single and twin engined aeroplanes fresh, or ventilated air, is usually supplied by -

Answer 13

ram air ducts

Question 14

In the case of light single and twin engined aeroplanes fresh, or ventilated air, in the case of a pressurised gas turbine aeroplanes, draw air from -

Answer 14

the compressor section of the engine, which must be cooled

Question 15

Which type of heating system:

This simple heating system is used commonly on light aeroplanes. A hot air jacket is mounted around the engine exhaust tailpipe. Air which is routed through the jacket comes into contact with the heated metal surface and is the supplied to the cabin.

Answer 15

Exhaust gas heater

Question 16

Which type of heating system:

Although this type of heater may vary from aeroplane to aeroplane, four common requirements must be met; a supply of fuel to burn, a method to ignite the fuel, air to provide oxygen to burn and ventilating air to carry the heat around the cabin.

Answer 16

Combustion heater

Question 17

Which type of heating system:

This system comprises a series of high-resistant wire coils mounted in an air supply duct which, when fed with an electric current, becomes hot.

Answer 17

Electrical Heater

Question 18

Which type of heating system:

This the most common method of providing heat in modern large jet transport aeroplanes and comprises three parts: a compressor, and a turbine which are linked together and a heat exchanger.

Answer 18

Compressed air heating( boot-strap system)

Question 19

What is the maximum allowable cabin altitude?

Answer 19

8 000ft

Question 20

The cabin sink and climb rate limits?

Answer 20

300 fpm and 500 fpm

Question 21

The simplest method of providing pressurisation in reciprocating engine aeroplanes is to draw air from either the -

Answer 21

supercharger or turbo charger

Question 22

A more acceptable method of providing pressurisation is through independent cabin compressors, which are either -

Answer 22

a centrifugal compressor or a positive displacement type

Question 23

The modern turbine powered aeroplanes usually use what type of pressurisation method?

Answer 23

turbine compressor bleed air.

Question 24

PSI is?

Answer 24

pound per square inch

Question 25

Differential pressure is -

Answer 25

The difference between the cabin pressure and the ambient pressure

Question 26

The maximum altitude at which the aeroplane may operate at a certain cabin altitude is determined by the -

Answer 26

differential pressure

Question 27

The term that describes a condition in which cabin pressure is higher than ambient pressure -

Answer 27

positive differential

Question 28

The term that describes a condition in which cabin pressure is lower than ambient pressure -

Answer 28

negative differential