Brainscape's Knowledge GenomeTM

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


See full index

M11 > M11.12 > Flashcards

M11.12 Flashcards

1
Q

What is the heating element in an electrical heating circuit usually made up of?

A

A metal wire, power supply and a temperature or power control unit

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

How many different types of temperature control are used in aircraft electrical heating circuits?

A

Two: a bimetallic switch or an electronic switch

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

With window heat operation, what is the maximum demand of heating power?

A

2 kW

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

What type of coating provides up to a 100° contact angle?

A

Hydrophobic coating

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

Why don’t we operate the optical ice detector systems all of the time?

A

Because it takes hot air from the engines which reduces their performance and economy

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

What does the rotary type ice detector consist of?

A

Consists of a single phase AC motor that drives a serrated rotor in close proximity to a stationary knife edge cutter

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

What are the main components of a window heat system?

A

The window itself, the temperature control and the monitoring circuit

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

What type of fluid is used for chemically deicing a propeller?

A

Glycol-based fluid

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

What are deicer boots made out of?

A

A soft, pliable rubber, or rubberised fabric

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

What are the five procedures you should carry out to make sure the deicer boot has maximum life?

A

Do not drag refuelling hoses over the deicing boot, keep the surface of the boots free from fuel, grease and dirt, do not lay tools on or lean maintenance equipment against the boots

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

When is the manual override function is on thermal anti-ice valves?

A

When there is a valve or system failure

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

When does the solenoid control valve close by spring force?

A

When there is no air pressure

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

The part of the ice detector you can see outside the aircraft is called what?

A

Magnetostrictive probe tip

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

In the engine anti ice system, where are the two places the air can come from?

A

Engine bleed air and the pneumatic system

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

What are the two negative effects on the engine inlet of ice buildup?

A

A disturbed airflow and potential FOD damage

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

When would you perform the icing and what with?

A

Shortly before take off with a de icing fluid

17
Q

Is the telescopic duct short or long when the slats are retracted?

A

Short

18
Q

When do anti-ice systems usually operate?

A

In-flight

19
Q

What is the main advantage of an electrical temperature control circuit?

A

It has no mechanical parts that can wear

20
Q

What circuit protects the anti-icing system from overheating?

A

The overheat protection circuit

21
Q

On the pressure regulating valve, the valve motion stops when the downstream pressure is?

A

At the correct value, about 20 psi

22
Q

On the pressure regulating valve when the pressure decreases below 14 psi will you get a fault light?

A

No because the ground sensing switch opens the circuit

23
Q

What temperature does clear ice and rime ice form at?

A

Clear ice between zero and -10 and rime ice below -10°C

24
Q

On what part of the wing do both types of ice form?

A

On the leading edge

25
Q

Why is there only one anti ice switch for two anti-ice valves?

A

Because they both have to be operated at the same time

26
Q

If an anti-ice valve has to be manually closed and locked, what other action must be taken?

A

The one on the other side must be closed and locked too

27
Q

What positions can the engine anti ice valves be locked in?

A

In the open or closed position

28
Q

What logic shots of the wing anti-ice system when the aircraft lands?

A

Ground to air

29
Q

What two methods can be used to deice propeller blades?

A

Electrical heating elements and chemical deicing fluid

30
Q

What two methods do we use to control the heating power in an electrically heated system?

A

The temperature control circuit and the power control circuit

31
Q

What are the four types of probes?

A

Angle of attack/alpha sensors, temperature probe, pitot tube and static ports

32
Q

Why is it important to heat aircraft probes?

A

Because with ice buildup there could be unreliable data readings

33
Q

Why does a propeller rubber boot have a grooves in it if it uses a chemical deicing system?

A

In order to get the fluid to run along the wing at different angles

34
Q

If we are to test the windscreen wiper system, what must we ensure?

A

That the screen is not dry

35
Q

That’s what speed must we ensure that we don’t switch on the windscreen wipers?

A

250 knots

36
Q

What is the purpose of the convert it in the windscreen wiper system?

A

It converts the rotating output of the motor to the cycling movement of the wiper

M11 (7 decks)

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