Ice and Rain Control Flashcards

1
Q

What controls the temperature in a thermal anti-icing system?

A

Hot and cold air mixed

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

What are the sources of heat for thermal anti-icing system?

A

Bleed air from the compressor section of a turbine engine, engine exhaust heat exchangers and combustion heaters.

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

What prevents overheating of the leading edge of a thermal anti-ice system operated by engine bleed air?

A

Overheat sensors signal the anti icing valves to close and shut off the hot air

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

What happens to the hot air used by a thermal anti ice system after it has heated the surface?

A

The air is dumped (exhausted) overboard

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

Why is it necessary to provide overheat protection for anti-icing systems that use turbine engine bleed air?

A

The air is hot enough to cause damage to the aircraft structure

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

What are the effects of arcing on an electrically heated windshield?

A

Localized overheating and damage to the windshield

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

Can the operation of an electrically heated pitot-tube be checked with the aircraft’s ammeter, and if so, How?

A

Yes, turn the pitot heater on and observe the deflection of the ammeter needle

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

Describe several potential problems associated with electrically heated windshields?

A

Arcing, delamination, scratches, and discoloration

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

why do some pneumatic deicer boot systems have an electrically operated timer?

A

To automatically cycle the boots, provide the proper rest time, and then recycle the boots

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

What are the two common methods of inflating pneumatic deicer boots?

A

bleed air from a turbine engine or the exhaust from an engine-driven vacuum pump

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

What procedure is used to hold deicer boots flat with the airfoil surface during flight?

A

Suction is applied to the boots

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

Why do some deicer boot systems incorporate an oil seperator?

A

If a wet pump system is used, the oil must be removed before it reaches the boots because oil damages the rubber

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

What methods are used to attach a deicer boot to the leading edges of the wing and tail surfaces?

A

Adhesives, fairing strips and screws or combination of both.

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

What important step should be taken prior to making a cold patch repair to a deicer boot?

A

consult the manufacture’s service manual and follow the repair instruction explicitly

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

Describe the methods commonly used to remove rain from a windshield?

A

Windshield wipers, a blast of air, or chemical rain repellant

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

What power source are used to operate windshield wiper?

A

Electricity or hydraulic pressure

17
Q

Name two problems associated with in flight-operation of aircraft windshield wiper?

A

Insufficient blade pressure caused by aerodynamic forces and failure to oscillate fast enough

18
Q

Describe the operation of a pneumatic rain removal system

A

A high velocity air blast prevents the rain from reaching the surface of the wind shield

19
Q

What are the effects of spraying rain repellant on a dry windshield?

A

it smears and streaks, which reduces visibility , and it is hard to remove when dry.

20
Q

where would you find information on the acceptable limits of windshield delamination?

A

In reference material provided by the manufacturer