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T-1 Jayhawk > Electrical System > Flashcards

Electrical System Flashcards

1
Q

There are __ DC buses

A

15

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2
Q

There are __ AC buses

A

6`

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3
Q

The main aircraft battery is a __-volt, ___-____ battery

A

24-volt, lead-acid

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4
Q

Ops limits for GPU (volts & amps)

A

28-28.5 V, 1,000 to 1,500 amps

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5
Q

Generators provide __ volts and ___ amps.

A

28 V, 400 amps

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6
Q

Location of the main aircraft battery

A

Aft fuselage compartment

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7
Q

Location of the standby battery

A

Aircraft nose

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8
Q

With the Master L and R GEN switches in EMER, you will be down to…

A

… standby power only

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9
Q

Each inverter converts DC power to __ and ___-volt, ___ Hz AC power

A

26 and 115-volt, 400 Hz

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10
Q

What type of power (AC or DC) is used for most T-1A systems?

A

DC

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11
Q

Where are the generators located?

A

Engine accessory gearbox (lower front portion of engine)

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12
Q

Each generator has a ___ that controls starting & generating modes of operation

A

Generator Control Unit

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13
Q

How many inverters does the T-1A have?

A

2

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14
Q

What’s the visual cue that a push-pull circuit breaker has popped?

A

A white ring shows around the CB.

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15
Q

What are the 3 sources of DC power?

A

acft battery, external power, starter-generators

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16
Q

Starter-generator requires __% N2 to produce the rated power output

A

58%

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17
Q

The GCUs work together to ____ the load between the generators

A

equalize

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18
Q

GCU removes power from the starter at approximately….

A

35-40% N2

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19
Q

GCUs are located in the upper portion of the…

A

aft fuselage compartment

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20
Q

The aircraft battery is rated at __ ampere-hours

A

40

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21
Q

How many feeder lines are on each side of the aircraft?

A

3

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22
Q

How many feeder lines are normally active?

A

2

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23
Q

What causes L or R BUS FDR FAIL to illuminate?

A

The third (standby) feeder line has become active.

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24
Q

How many times can you reset BUS FDR circuit breakers?

A

0

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25
Q

Battery switch, in ON, power 3 relays:

A

Battery relay, Battery tie-in relay, Emergency bus power relay

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26
Q

On the Before Exterior Inspection, battery voltage should be…

A

22 to 24 volts

27
Q

Don’t start 2nd engine until 1st generator load is below…

A

150 amps

28
Q

Prestart, engine starting, and emergency power is provided by the aircraft…

A

…battery

29
Q

External power receptacle is located…

A

… on lower left side of fuselage

30
Q

The ____ provides ground fault protection & voltage regulation for generators.

A

GCU

31
Q

The ___ provides a connection for all DC power

A

battery charge bus

32
Q

The LH and RH bus-tie RCCBs tie the LH and RH ___ buses to the ___ bus

A

main; battery charge

33
Q

What are the 2 primary buses for secondary power distribution?

A

load buses

34
Q

Placing battery switch to EMER isolates the ___, & connects the battery to the ____bus

A

start bus; emergency bus

35
Q

What’s the max operating load for 1 generator at FL200?

A

400 amps

36
Q

What’s the max load for each generator on the ground?

A

280 amps

37
Q

With 2 generators operating, what’s the max load for each?

A

280 amps

38
Q

With only one generator operating in flight, up to 32,500 ft, what’s the max load?

A

400 amps

39
Q

With only one generator operating in flight, above 32,500 ft, what’s the max load?

A

280 amps

40
Q

Standby bus powers:

A

CP instrument lights; RTU #1, UHF radio, ITT #1, Stby altimeter vibrator, Stby ADI, EFC sys (CRUISSE)

41
Q

Standby battery voltage:

A

24 volts

42
Q

Standby bus is normally powered by…

A

… LH Load Bus

43
Q

Standby power switch & indicator lights are on the ___ panel

A

right instrument

44
Q

What buses can be powered by the standby battery?

A

Standby bus only

45
Q

On the standby power switchlight, what does ON mean?

A

Standby battery is the only source powering standby bus

46
Q

If the right load bus loses power, #2 inverter can be powered by…

A

…the emergency bus

47
Q

Primary Shed buses disconnect when:

A

1 inverter isn’t supplying 115-v AC, #2 inverter is on, and #2 inverter is powered by emergency bus

48
Q

During normal ops, leave the rotary AC voltmeter switch in ___ position

A

NO 1 INV - 115V

49
Q

The #1 inverter is normally powered by what bus?

A

LH Load bus

50
Q

Voltage & freq of the #2 inverter is regulated by the ___.

A

2 inverter internal circuitry

51
Q

Normally, the secondary AC buses are powered by the ___.

A

2 inverter

52
Q

The inverter selector switch has what 3 positions?

A

NO 1, AUTO, NO 2

53
Q

What’s the color and location of the navigation lights?

A

2x red - left wingtip; 2x green - right wingtip, 1 white - back of vert stab

54
Q

After gear retraction, how would you extend landing lights?

A

recycle switches: RET/OFF then EXT/ON

55
Q

Max airspeed/altitude for the landing lights

A

200 KIAS / FL200

56
Q

When should cabin general area floodlights automatically extinguish?

A

When aircraft is airborne, or when general area fluorescent lights illuminate

57
Q

To arm instrument floodlights…

A

place integral switch to INTEG

58
Q

Where is the anti-collision beacon? What color?

A

Top of vertical stabilizer. Red.

59
Q

What are first indications of right generator failure?

A

MASTER CAUTION & R GEN OFF annunciators

60
Q

With RH generator failure, what voltage should the voltmeter read for RH GEN position?

A

0

61
Q

If you can’t reset a generator, maintain a minimum of __ N2 on the other engine

A

58%

62
Q

What are the indicators of #2 Inverter failure?

A

MASTER CAUTION, INV 2 FAIL, and 0 volts for #2 positions on AC voltmeter

63
Q

If smoke or fumes are present with an electrical fire, what’s the first step?

A

OXYGEN MASKS - DON/100%

64
Q

On Elec. Fire checklist, after master gen switches -> EMER, batt -> OFF, what’s powered?

A

Stby bus only

T-1 Jayhawk (11 decks)

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