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324 Aircraft Systems > Block Exam > Flashcards

Block Exam Flashcards

1
Q

What are the 2 types of Current electricity?

A
  1. Alternating Current (AC)

2. Direct Current (DC)

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2
Q

What are the 2 types of Electricity?

A
  1. Static - not often useful

2. Current - AC/DC

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3
Q

How is Current electricity produced?

A
  • Electrons move through a circuit and perform work
    1. Magnetic Field
    2. Heat Generation
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4
Q

What type of electricity does an Alternator use?

A

AC

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5
Q

What kind of electricity comes a battery?

A

DC

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6
Q

What type of electricity would an energy storage device for remote starting have?

A

DC

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7
Q

What are the 6 ways we can PRODUCE energy?

A
  1. Friction
  2. Heat
  3. Light
  4. Pressure
  5. Chemical Reaction
  6. Magnetism
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8
Q

What is Thermocoupling?

A
  • A loop of different metals with 2 junctions

- Electric current will flow through wires when there is a temperature differential

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9
Q

Explain Light energy. Is there anything in out aircraft that uses this?

A
  • Light is energy
  • When light strikes photoemissive materials, electrons are forced to scatter and do work
    Ex: PFD!
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10
Q

Explain Pressure energy. What is 1 example?

A
  • When a material with Piezoelectricity is bent/deformed by a mechanical force
  • Excess of electron accumulation on the surface
    Ex: Record Player
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11
Q

Explain Chemical energy

A

An imbalance of electrons (E will move from high to low, being forced through a conductor which creates a chemical reaction)

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12
Q

What is 1 coulomb?

A
  • An electrical quantity

- 6.28 x 10 to the 18th power

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13
Q

1 ____ is the movement of 1 coulomb per second

A

1 amp = movement of 1 coulomb per second

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14
Q

What is the measurement of flow/current?

A

Amps

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15
Q

1 ____ is the resistance through which 1 volt can force 1 amp (to flow)

A

1 ohm = resistance through which 1 volt can force 1 amp

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16
Q

What is the measurement of resistance?

A

Ohms

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17
Q

What is the measurement of pressure?

A

Volts

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18
Q

1 HP = _____ (mechanical)

A

33,000 ft/lbs per minute (mechanical)

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19
Q

1 HP = _____ (electrical)

20
Q

If you have a 110 volt/9 amp motor, how many Watts is it?

A

110 x 0.9 = 99 Watts

21
Q

What is the equation for calculating Watts?

A

Watts = Volts x Amps

22
Q

What kinds of electricity is found in wall socket outlets?

23
Q

What kind of electricity do our laptops utilize?

24
Q

What is a TRU? What does it do?

A
  • Transformer Rectifying Unit

- Transforms AC to DC

25
Will you ever have AC batteries?
NO
26
What is the equation for Amps?
Amps = Volts/Resistance | - Current/flow is directly proportional to pressure, and inversely proportional to resistance
27
True of False: Current can only flow one direction.
TRUE
28
______ Current is constantly changing in direction (phase) and amplitutde
Alternating Current (AC)
29
___ Current is based on the flow in ONE direction (- or +)
Direct Current (DC)
30
Simply put, what is a battery?
An energy storage device! | - Device composed of 1+ cells in which CHEMICAL energy is converted into ELECTRICAL energy
31
What kind of batteries ARE rechargable?
Secondary Cell Batteries (vs Primary Cell)
32
What is RATED Capacity?
- Indicates a battery's ability to perform when it is new | pg 182
33
What 3 things affect charge?
idk
34
What 2 things will affect the Condition of a battery?
Degraded by: 1. Age 2. G-Force stress
35
Explain Series Circuits (pg 210) DRAW IT
- ALL electrons must flow through ALL active components
36
Explain Parallel Circuits (pg 210) DRAW IT
- A portion of current flows through each filament
37
AIRCRAFT electrical system. What are the 6 main components?
(pg 213-220) 1. The source of power (12v Negative Ground - Negative terminal of battery is connected to the air frame) 2. Master Solenoid/Switch (Way to isolate the battery from rest of electrical system) 3. Starter Circuit (Electrons flow from battery and through the Starter Motor Circuit and Control Circuit in a constant loop) 4. The Busbar (Circuit breakers installed/mounted on a busbar) 5. Individual Working Circuits (connected through busbar, protected by circuit breaker, controlled by a switch) 6. The Alternator (E pump)
38
Alkaline, carbon zinc, and lithium ion are examples of what type of battery?
Primary (dry) cell batteries
39
Lead acid and nickel-cadmium (NiCad) are examples of what type of battery?
Secondary (wet) cell batteries | ~ Rechargeable
40
What 3 things will affect ACTUAL Capacity of a battery?
1. Battery Temperature 2. Battery State of Charge 3. Battery Condition
41
Battery condition is degraded by what 2 things?
1. Age | 2. G-Force
42
Explain what happens with a Thermal Runaway
- Rise in battery temperature leading to rise in current - The battery begins to accept ALL of the charging current the source is capable of producing - Battery gets so hot that it may explode or melt
43
What are 4 general facts about Generators?
- AC or DC Generators - Stationary magnets, rotating conductor/coil - Simpler, easier to control - Most common in Turbine engine a/c
44
Describe an AC Generator. What are its main components? What 3 things does current output depend on?
- 1 conductor/coil formed into a loop with ends attached to SLIP RINGS - Brush - Sine Wave (output) varies - Amount of current produced depends on: 1. # of lines of flux 2. # of conductors cutting the flux 3. Speed at which conductors move through the flux
45
Describe a DC Generator. What are its main components?
- Ends of conductor/coil are attached to a SPLIT RING - Negative and Positive Brush - AC is generated in the coil/armature and SPLIT RING commutator causes E flow through LOAD to all be in 1 direction - Commutator creates the pulseating DC output
46
What are the 2 basic types of batteries? What makes them different?
1. Primary - Cannot be recharged | 2. Secondary - Rechargeable

324 Aircraft Systems (3 decks)

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