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PPL - AGK > Electrical System > Flashcards

Electrical System Flashcards

1
Q

The number of electrons flowing around a circuit is measured in what

A

AMPS

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2
Q

The force in which electrons are moved around a circuit is measured in what

A

VOLTS

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3
Q

Resistence is measured in what

A

OHMS

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4
Q

What are the 2 current types

A
  1. DC
  2. AC
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5
Q

What typically generates a DC current

A

BATTERIES

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6
Q

Why 2 things typically generate an AC current

A
  1. Generators
  2. Alternators
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7
Q

What is the equation for resistors in series

A

R total = R1 + R2 + R3

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8
Q

What is the equation for resistors in parallel

A

1 / R total = 1 / R1 + 1 / R2 + 1 / R3

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9
Q

What is a capacitor

A

Components that can store electrical charge

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10
Q

Electrons flow in which direction

A

NEGATIVE to POSITIVE

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11
Q

Conventional electron flow is considered to flow in which direction

A

POSITIVE to NEGATIVE

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12
Q

What is the equation for capacitors in series

A

1 / C total = 1 / C1 + 1 / C2 + 1 / C3

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13
Q

What is the equation for capacitors in parallel

A

C total = C1 + C2 + C3

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14
Q

A wire moved through a magnetic field producing a current is considered what

A

GENERATOR or ALTERNATOR

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15
Q

A current passed through a wire producing a magnetic field which produces motion is considered what

A

MOTOR

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16
Q

What is the definition of static electricity

A

Imbalance of electrical charge

17
Q

How is static electricity encouraged to dissipate on aircraft

A

STATIC WICKS

18
Q

What are 2 possible results of lightening strike on a metal airframe

A
  1. Puncture holes
  2. Wingtips blown off
19
Q

What is a possible result of a lightening strike on a glass reinforced plastic aircraft

A

EXPLODE

20
Q

What are 4 systems that can be damaged by a lightening strike

A
  1. Compass
  2. Communications Radios
  3. NAV equipment
  4. Computer
21
Q

What are 2 temporary effects on a pilot following a lightening strike

A
  1. Blindness
  2. Deafness
22
Q

The 2 typical voltage of aviation batteries

A
  1. 12V
  2. 24V
23
Q

What is battery capacity measured in

A

AMPERE HOURS (Ah)

24
Q

How many amps can a 100Ah battery deliver;
1. 1 hour
2. 2 hours
3. 30 minutes

A
  1. 100 Amps
  2. 50 Amps
  3. 200 Amps
25
Q

2 x 12V 120Ah batteries are connected in series. What is the total;
1. Voltage
2. Capacity (Ah)

A
  1. 24 V
  2. 120 Ah

REMEMBER: **
VOLTS in SERIES - Ess sound at end of VoltS** sounds like SERIES
AMPS in PARALLEL - the “Ah” sound of amp sounds like the “ah” sound in pArallel

26
Q

2 x 6V 220Ah batteries are connected in parallel. What is the total;
1. Voltage
2. Capacity (Ah)

A
  1. 6v
  2. 440 Ah

REMEMBER: **
VOLTS in SERIES - Ess sound at end of VoltS** sounds like SERIES
AMPS in PARALLEL - the “Ah” sound of amp sounds like the “ah” sound in pArallel

27
Q

What device is used to convert AC to DC

A

RECTIFIER

28
Q

What are 2 devices typically used in aviation to provide charging to aircraft battery

A
  1. Generator
  2. Alternator
29
Q

How is the magnetic field in an alternator produced

A

FIELD WINDING

Coil of wires

Coil needs a source of electricity to produce a magnetic field

30
Q

What is a key difference between an alternator compared to a generator

A

DOES NOT CONTAIN MAGNETS

31
Q

A GENERATOR or ALTERNATOR produce electrical power at lower RPM

A

ALTERNATOR

32
Q

What is the purpose of a Solenoid or Relay

A

SLAVE DEVICE

Prevents high current being connected to a switch operated by the pilot
Pilot operates a switch that uses a small current to operate a switchin within the Solenoid/Relay
This allows a high current to then be passed to the on load device

33
Q

What does the master switch operate

A

BATTERY SOLENOID

Connects battery power via solenoid contacts to power bus

34
Q

What is a power bus bar used for

A

ELECTRICAL POWER DISTRIBUTION

35
Q

What is the name of the cog and spring arrangement in a starter motor

A

BENDIX

Bendix is withdrawm from the flywheel

36
Q

When the engine starts and pilot releases the starter mechanism, what happens within the starter motor

A

BENDIX DISENGAGES

PPL - AGK (20 decks)

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