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Common Core 2 Flashcards

(85 cards)

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1
Q

Electricity

A

the physical phenomena arising from the existence and interaction of an electrical charge

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2
Q

Voltage, or EMF(Electromotive Force)

A

the amount of force being applied to a circuit to produce an electron flow

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3
Q

Amperage, or current flow

A

quantity of electricity flowing through the circuit

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4
Q

Resistance

A

opposition to the flow of electrons offered by a device or material

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5
Q

OHM(Omega)

A

the measurement of resistance to current flow

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6
Q

Watt

A

measurement of electrical work done

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7
Q

Forms of Electricity?

A

Static and Dynamic

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8
Q

Static Electricity

A

is electricity at rest, produced by friction and not easily measured nor controllable or useable

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9
Q

Dynamic Electricity

A

practical form of current flow, easily produced, measured, and controlled

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10
Q

Methods of Producing Electricity?

A

Mechanical, Chemical, Thermal, and Pressure

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11
Q

Mechanical produced electricity

A

by rotating a magnetic field through another magnetic field

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12
Q

Chemical produced electricity

A

surrounding two or more metallic plates with a chemical electrolyte

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13
Q

Thermal produced electricity

A

joining two dissimilar metals and applying heat

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14
Q

Pressure produced electricity

A

applying pressure to quartz, which will produce an electron flow

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15
Q

Types of Electricity?

A

DC(direct current) and AC(alternating current)

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16
Q

DC

A

is a steady current flow in one direction only, produced by a DC generator, or chemically by a battery

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17
Q

AC

A

flow that reverses direction at specific intervals, HERTZ/CYCLES. produced mechanically by an AC generator

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18
Q

SAFETY AROUND ELECTRICAL EQUIPMENT

A

determine power requirements before testing, inspect test equipment for calibration date

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19
Q

Multimeter

A

measures voltage, current, and resistance

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20
Q

Before making a resistance measurement??

A

remove all power to the circuit under test and discharge all residual voltage from storage capacitors

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21
Q

Multimeter Low Battery indicator

A

100 hours of life remain, standby mode kicks in after 1 hour of no use

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22
Q

AIRCRAFT ELECTRICAL SYSTEM

A

provides electrical power to the various aircraft systems

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23
Q

COMPONENTS OF THE Aircraft Electrical System

A
  1. Generator
  2. Control Switches
  3. Generator Advisory Lights
  4. AC/DC Transformer Rectifiers
  5. Power Distribution(AC/DC BUSES)
  6. Emergency Generator
  7. External Electrical Power Receptable
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24
Q

Aircraft Electrical System: Generator

A

produced AC power of three phase, 115/200VAC, 400Hertz. Driven by a constant speed drive(CSD) unit that regulates the generator at a constant speed

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25
Aircraft Electrical System: Control Switches
located in the flight station/cockpit. Used to select electrical power
26
Aircraft Electrical System: Generator Advisory Lights
located in the flight station/cockpit. Indicates if the generator is supplying power
27
Aircraft Electrical System: AC/DC Transformer Rectifiers
convert AC power to DC power
28
Aircraft Electrical System: Power Distribution(AC/DC Buses)
a number of circuits may be connected, protected by circuit breakers.
29
Aircraft Electrical System: Emergency Generator
three phase 115/200VAC, 400Hertz generator that will provide electrical power to both essential AC and DC buses in the even of main generator failure. NOT ALL AIRCRAFT HAS EMERGENCY GENERATORS
30
Aircraft Electrical System: External Electrical Power Receptacle
Provides a means of connecting an electrical source of external electrical power for ground maintenance and servicing
31
Pictorial Diagram
simplest of all diagrams. provides readily component identification
32
Block Diagram
Arrangement of blocks that are labeled with the name of each component, presents a general description
33
Schematic Diagram
most useful of all diagrams, provides overall aid to system operation. Illustrates various components that make up the system
34
Series circuit
a circuit with only one path for current flow
35
Parallel circuit
circuit with two or more paths for current flow known as branches
36
Series-Parallel circuit
circuit which is part series and part parallel
37
Engine Electrical System
provides electrical power to the engine performance indicators.
38
Engine Electrical System Components
1. Engine Speed Indicating System 2. Engine Temperature Indicating System 3. Fuel Flow Indicating System 4. Oil Pressure Indicating System 5. Engine Fire Detection System
39
Tachometer Indicator
indicates compressor rotor RPM in %.
40
Tachometer Generator
mounted and splined to the accessory gearbox, creates an electrical signal representing rotational speed of engine compressor
41
Thermocouple Assembly
mounted in the turbine or exhaust section, they are 2 dissimilar metals Alumel and Chromel, creating voltage signal of engine exhaust temp
42
Fuel Flow indicating system
indicates the amount of fiel being consumed by the engine in PPH
43
Fuel Flow Transmitter
mounted on the engine, provides an electrical signal that is proportional to the mass rate of fuel flow
44
Oil Pressure Indicating System
provides indication of engine oil pressure in PSI
45
Engine Fire Detection System
alerts pilot of an engine bay fire or overheat
46
Fire Detection Element
senses an overheat condition or fire and transmits the signal
47
Starting System
provides initial rotation to accelerate the engine to the point where ignition can be accomplished and sustained
48
Ignition System
provides a high energy spark at the engine ignitor plugs
49
Type of ignition system....
a high energy capacitor discharge type
50
Ignition System Components
Input leads Transformer Ignitor Leads Ignitor Plugs
51
Types of Engine Lubrication Systems
Wet Sump and Dry Sump
52
Wet Sump----
stores oil within the gearbox, used primarily on centrifugal flow engines
53
Dry Sump----
stores oil in a separate oil tank, used on axial flow engines, allows a larger supply of oil
54
OIL pressure relief valve
limits maximum system pressure, and returns excess oil to the inlet side
55
Lubrication System Pumps
Pressure element pump | Scavenge element pump
56
Types of Pumps
Gear type--may be dual or multi element | GErotor type--may be single dual or multi element
57
Lubrication System Filters
Cartridge Filter--periodically removed and replaced Screen Filter--can be cleaned and reused Screen Disk Filter--can be cleaned and reused
58
Lubrication Heat Exchangers
Transmits heat from the oil to Air or Fuel | Air/Oil and Fuel/Oil
59
Lubrication Jets(Nozzles)
direct oil onto the bearings and or gears, can be mist or solid spray
60
Oil Pressure Transmitter
senses oil in the lube system, sends signal to indicator displaying pressure in PSI
61
Types of Lubricating Oils
Petroleum based and Synthetic based
62
Oil used in most gas turbine engines is?
MIL-L-23699 or NATO O-156
63
Main Engine Bearings
support compressor and turbine rotors to allow free rotation
64
What determines the Number of bearings?
Length, Weight, and the number of rotors
65
Accessory bearings
allow accessory shafts and gears to move freely
66
Types of Bearings
Ball bearings--absorbs axial and radial loads | Roller bearings--used in high centrifugal force areas, absorbs radial loads only
67
Oil Seals
Labyrinth, Thread, and Carbon
68
Labyrinth seal
controlled by engine bleed air
69
Thread seal
seal that uses reverse threading and centrifugal force to retain oil
70
Carbon seal
a spring loaded seal mated with a machined surface
71
Aircraft Fuel Systems purpose
to provide a controlled means of receiving fuel from external sources and supply fuel to the engine
72
Jet Propellant is a type of?
highly refined kerosene and is clear or light straw in color, classified into grades
73
Volatility
ability to evaporate
74
AVGFE
aviation gas free engineering, must be performed prior to entering any type of fuel cell
75
Aircraft Fuel Pumps
delivers a continuous supply of fuel to the engines UNDER ALL OPERATING CONDITIONS
76
Types of Aircraft fuel pumps
Transfer Pump and Boost Pump
77
What must be performed prior to entering any type of Fuel Cell for Maintenance
AVGFE (Aviation Gas Free Engineering)
78
Electrically operated shut-off valves are commonly referred to as?
Gate valves
79
Why are Manually operated shut-off valves important?
they may be closed to stop fuel flow in case of fire
80
Fuel Drains purpose
drain condensation, excess fuel, and samples of fuel.
81
External tank capacity
150, 300, 400 gallons, mounted on pylons on the underside of the wings and fuselage
82
do not conduct _________ within _____ feet of operating aircraft
fueling operations, 100 feet
83
how many people is required for fueling
minimum of 3
84
Engine-Driven Fuel Pump
provides a continuous supply of fuel AT THE PROPER PRESSURES under all operating conditions
85
Aircraft Fuel Pumps
provides a continuous supply of fuel to the engines under all operating conditions

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