Block IV Flashcards

1
Q

What is the unit of electrical resistance?

A

Ohm

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2
Q

What is the opposition of which a device or material offers to the flow of current?

A

Resistance

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3
Q

A device to connect, disconnect, or change the connections in an electrical current

A

Switch

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4
Q

Signifies electrical pressure. Force which causes current to flow through an electrical conductor

A

Voltage

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5
Q

The elementary negative charge that revolves around the nucleus of an atom

A

Electron

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6
Q

An electric current that flows in one direction only

A

Direct current

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7
Q

The complete path of an electric current

A

Circuit

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8
Q

An electric current that flows in both directions

A

Alternating current

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9
Q

E = IR
current is directly proportional to the electromotive force in the circuit

A

Ohm’s law

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10
Q

An arrangement where electrical devices are connected so that the total current must flow through all devices

A

Series circuit

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11
Q

A circuit that consists of both series and parallel networks

A

Series-parallel circuit

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12
Q

What is the minimum electrical power required to perform normal ground operations

A

120/208 volt, three-phase, 400 Hz electrical power.
Allowable current is 365(+/- 35) per power receptacle

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13
Q

How many IDG’s are there?

A

8

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14
Q

IDG 1, 3, and 5 provide power to what?

A

Air vehicle equipment synchronizing bus (AVE sync bus)

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15
Q

IDG 2, 4, 6, and 8 provide power to what?

A

Mission equipment synchronizing bus (ME sync bus)

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16
Q

Can supply power to any load buses via their individual bus tie breakers whenever the main generators and ground power sources are not operating

A

APU generator power system

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17
Q

What are the two main distribution systems?

A

AC & DC

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18
Q

Where does the AC feeder originate?

A

At the generator circuit breakers on the E-15 and E-16 equipment racks

19
Q

How many transformer rectifier units (TRUs) is DC?
Where is it located?

A

4 TRUs - located on E5 rack

20
Q

Supplies power to lights, instruments, and loads requiring 28 VAC, 400-Hz power

A

VAC power system

21
Q

What are the 2 external power receptacles and where are they located?

A

EP1A and EP1B
Located on left side of the fuselage, forward of the wing

22
Q

What are the 2 additional external power receptacles and where are they located?

A

EP2A and EP2B
Located in the forward end of the E-16 rack for use during high power performance checks

23
Q

The complete path of an electric current

A

Circuit

24
Q

If current in the circuit exceeds the rating, this should automatically trip to break the circuit

A

Circuit breaker

25
Q

How many times can a circuit breaker be reset?

A

Once - due to fire hazard

26
Q

GCU stands for? And does what?

A

Generator Control Unit

Provides voltage and current control functions

27
Q

FLCU stands for? And does what?

A

Frequency and Load Control Unit

Provides speed trim signals for controlling real load in each generator channel

28
Q

How many FLCUs are there?
Where are they located?

A

8

1, 3, 5 located on E-15 rack
2, 4, 6, and 8 located on E-16 rack

29
Q

FRAPU stands for? And does what?

A

Frequency Reference Auto-Paralleling Unit

Provides precise frequency control

30
Q

BPCU stands for? And does what?

A

Bus Power Control Unit

To control and protect synchronous bus

31
Q

Commonly known as auto pilot

A

Flight Guidance System

32
Q

How many pitot-static systems are there?

A

3

One for Pilot station instruments
One for Co Pilot station instruments
One for auxiliary system instruments

33
Q

Provides max breaking efficiency and relieving brake pressure from locked wheels

A

Anti-Skid

34
Q

Single loop system that is activated by wheel well fire detection control unit

A

Wheel Well Fire Detection System

35
Q

Heating circuits that are laminated into window to prevent icing and fogging

A

Anti-Ice

36
Q

How many batteries and where are they located?

A

4 - located in aircraft forward lower compartment

37
Q

What is the main aircraft battery set?

A

M686 and M689

38
Q

What is the emergency lighting battery set?

A

M5 and M6

39
Q

Condition in which current for fully charged battery rises out of proportion to the voltage. Can become dangerously hot, gas excessively, and spew electrolyte.

A

Thermal Runway

40
Q

Applied to components of E-6B and mission systems whose sensitivity to nuclear weapon environments can affect survivability

A

Hardness Critical

41
Q

EMP protection ensures all mission essential equipment has at least _______ safety margin.

A

-32dB

42
Q

EMP protection exists during when?

A

Ground operation, in-flight operation, in-flight refueling, and LTWA/STWA extended modes.

43
Q

What is the first level of EMP hardening?

A

Fuselage hardening

44
Q

What is the second level of EMP hardening?

A

Internal hardening