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Cat B- Mod 11 Aircraft Systems > 11.14 Lights > Flashcards

11.14 Lights Flashcards

1
Q

How is light produced?

A

Thermal radiation caused by passing a high current through a conductor.

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2
Q

What is luminous intensity measured in?

A

candela

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3
Q

What is luminous flux?

A

The amount of light radiated per second.

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4
Q

What is the unit of luminous flux?

A

Lumen

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5
Q

The ratio between luminous flux and the power consumed is called what?

A

Efficacy

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6
Q

How much higher is the start up power of a bulb compared to normal consumption?

A

15 times

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7
Q

What percentage of the energy that goes to a bulb is light?

A

12%

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8
Q

Why must halogen bulbs glass not be touched?

A

The aluminosilicate glass absorbs salt and grease from the skin.

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9
Q

What part of a strobe light actually emits the light.

A

Control electrode.

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10
Q

What are some of the advantages of LED’s?

A

Reduced mass
Reduced consumption
Longer life
Resilient

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11
Q

What regulation governs lights?

A

SERA.3215

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12
Q

Are nav lights mandatory?

A

Yes

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13
Q

What side is the red nav light?

A

Left

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14
Q

To what degrees must side nav lights be visible?

A

110 degrees
Rear- 70 degrees

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15
Q

What is the ELMS?

A

Electronic load management system

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16
Q

Where are the anti-col lights?

A

Wing tip and or upper/lower fuse

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17
Q

What is the common voltage of a beacon?

A

28 or 115

18
Q

How do strobes flash?

A

Using a set of capacitors that store up the energy and then release it across a gap in a gas filled tube.

19
Q

How much charge do the capacitors in a strobe store?

A

450v

20
Q

Landing lights in dim mode use what voltage?

A

7 AC

21
Q

How are landing lights aligned?

A

Aircraft on level ground and aircraft no more than 5 degrees from level.

22
Q

What 4 categories of internal lighting are there?

A

Flight deck
Passenger
Service
Emer

23
Q

How are incandescent lights manually dimmed?

A

Potentiometer
Transistor with Zener Diode
Transformer

24
Q

When is a transistor used instead of a potentiometer?

A

When a large amount of lights must be controlled

25
Q

What does a Zener diode allow?

A

Two modes, bright and dim

26
Q

What is a rheostat?

A

Dimming switch

27
Q

What is a circuit that uses a Diac and Triac known as?

A

Phase shifter circuit

28
Q

What does a small time constant give you in terms of brightness?

A

Full power

29
Q

What is a wander light?

A

Map reading light

30
Q

What are the two purposes of a glare shield?

A

To stop sun from whiting displays and to reflect instrument lighting to cast an overall lighting.

31
Q

In wedge lights what is the result of a lower angle?

A

More light is reflected

32
Q

What are trans-illuminated panels?

A

Bonded layers of acrylic plastics

33
Q

What are the two types of warning system in the cockpit?

A

Central warning System CWS
Crew Alert System CAS

34
Q

What system is CWS?

A

Analogue system

35
Q

What system is CAS?

A

Digital like ARINC

36
Q

What is wash lighting?

A

Lights through the length of the cabin.

37
Q

How is fluorescence in a lighting tube created?

A

When a free electron collides with mercury vapour atoms to produce ultra-violet radiation.

38
Q

If the engines are running and you open the flight deck door, what happens to the door light?

A

It turns off to avoid glare on the instruments.

39
Q

What must the emergency lighting system include?

A

Illuminated emer exit
Exterior emer lighting

40
Q

How long does the battery keep the emergency lights on for?

A

10-20 mins

41
Q

How long does it take to recharge the emergency lights battery?

A

16 hours

42
Q

What gas is in glow in the dark lights?

A

Tritium

Cat B- Mod 11 Aircraft Systems (28 decks)

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