Electrical System

Question 1

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

Answer 1

AMPS

Question 2

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

Answer 2

VOLTS

Question 3

Resistence is measured in what

Answer 3

OHMS

Question 4

What are the 2 current types

Answer 4

1. DC
2. AC

Question 5

What typically generates a DC current

Answer 5

BATTERIES

Question 6

Why 2 things typically generate an AC current

Answer 6

1. Generators
2. Alternators

Question 7

What is the equation for resistors in series

Answer 7

R total = R1 + R2 + R3

Question 8

What is the equation for resistors in parallel

Answer 8

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

Question 9

What is a capacitor

Answer 9

Components that can store electrical charge

Question 10

Electrons flow in which direction

Answer 10

NEGATIVE to POSITIVE

Question 11

Conventional electron flow is considered to flow in which direction

Answer 11

POSITIVE to NEGATIVE

Question 12

What is the equation for capacitors in series

Answer 12

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

Question 13

What is the equation for capacitors in parallel

Answer 13

C total = C1 + C2 + C3

Question 14

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

Answer 14

GENERATOR or ALTERNATOR

Question 15

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

Answer 15

MOTOR

Question 16

What is the definition of static electricity

Answer 16

Imbalance of electrical charge

Question 17

How is static electricity encouraged to dissipate on aircraft

Answer 17

STATIC WICKS

Question 18

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

Answer 18

1. Puncture holes
2. Wingtips blown off

Question 19

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

Answer 19

EXPLODE

Question 20

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

Answer 20

1. Compass
2. Communications Radios
3. NAV equipment
4. Computer

Question 21

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

Answer 21

1. Blindness
2. Deafness

Question 22

The 2 typical voltage of aviation batteries

Answer 22

1. 12V
2. 24V

Question 23

What is battery capacity measured in

Answer 23

AMPERE HOURS (Ah)

Question 24

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

Answer 24

1. 100 Amps
2. 50 Amps
3. 200 Amps

Question 25

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

Answer 25

1. 24 V 2. 120 Ah ## Footnote **REMEMBER: ** VOLTS in SERIES - Ess sound at end of Volt**S** sounds like SERIES AMPS in PARALLEL - the "Ah" sound of amp sounds like the "ah" sound in p**A**rallel

Question 26

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

Answer 26

1. 6v 2. 440 Ah ## Footnote **REMEMBER: ** VOLTS in SERIES - Ess sound at end of Volt**S** sounds like SERIES AMPS in PARALLEL - the "Ah" sound of amp sounds like the "ah" sound in p**A**rallel

Question 27

What device is used to convert AC to DC

Answer 27

RECTIFIER

Question 28

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

Answer 28

1. Generator 2. Alternator

Question 29

How is the magnetic field in an alternator produced

Answer 29

FIELD WINDING | Coil of wires ## Footnote Coil needs a source of electricity to produce a magnetic field

Question 30

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

Answer 30

DOES NOT CONTAIN MAGNETS

Question 31

A GENERATOR or ALTERNATOR produce electrical power at lower RPM

Answer 31

ALTERNATOR

Question 32

What is the purpose of a Solenoid or Relay

Answer 32

SLAVE DEVICE ## Footnote 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

Question 33

What does the master switch operate

Answer 33

BATTERY SOLENOID ## Footnote Connects battery power via solenoid contacts to power bus

Question 34

What is a power bus bar used for

Answer 34

ELECTRICAL POWER DISTRIBUTION

Question 35

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

Answer 35

BENDIX ## Footnote Bendix is withdrawm from the flywheel

Question 36

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

Answer 36

BENDIX DISENGAGES