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Advanced Systems > Electrical > Flashcards

Electrical Flashcards

1
Q

The aircraft AC generators are rated at:
120 VAC, 400 HZ at 35 KVA

115 VAC, 400 HZ at 40 KVA

115 VAC, 400 HZ at 35 KVA

115 VAC, 30 HZ at 400 KVA

A

115VAC
400HZ at 40KVA

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2
Q

Gen 2 normally powers:
AC BUS 1, ESS BUS and SERV BUS

AC BUS 2, AC ADG bus, and service bus

AC BUS 2 and SERV BUS

AC BUS 2, ADG BUS, SERV BUS

A

AC BUS 2 and SERV BUS

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3
Q

The engine or APU generator output is tripped off and removed from the bus system for which of the following:
Under voltage, over frequency, generator or bus over current

Over/under voltage, over/under frequency, generator or bus faults

Overvoltage, over frequency, generator or bus undercurrent

Under voltage, under frequency, generator or bus over current

A

Over/under voltage
over/under frequency
generator or bus fails

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4
Q

The batteries supply DC electrical power to the following buses under normal conditions:
MAIN BATT DIR BUS, APU BATT DIR BUS, DC EMER BUS, SERV BUS

MAIN BATT DIR BUS, APU BATT DIR BUS, DC BUS 1, DC BATT BUS

MAIN BATT DIR BUS, APU BATT DIR BUS, DC ESS BUS, DC BATT BUS

MAIN BATT DIR BUS, APU BATT DIR BUS, DC EMER BUS, DC BATT BUS

A

MAIN BATT DIR BUS, APU BATT DIR BUS, DC EMER BUS, DC BATT BUS

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5
Q

The ADG Bus provides power to __________ via the ADG bus:
Hydraulic pump 3B

Pitch Trim Ch 1

Both A & B

Neither A or B

A

Hydraulic pump 3B

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6
Q

The APU battery is:
24 volts rated at 43 ampere hours
24 volts rated at 17 ampere hours
12 volts rated at 17 ampere hours
12 volts rated at 43 ampere hours

A

24 volts rated at 43 ampere hours

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7
Q

The DC EMER BUS is always displayed on the DC ELECTRICAL synoptic page
t
f

A

False

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8
Q

The constant speed drive provides a means of converting
Variable generator speed to constant engine speed

Variable frequency output from the generators

Variable engine speed to constant generator speed

Variable generator speed to variable engine speed

A

Variable engine speed to constant generator speed

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9
Q

What can cause an IDG FAULT?
Generator over/under frequency

IDG oil overheats

Generator over/under voltage

IDG oil low pressure

B and D above

All the above

A

IDG oil overheats
IDG oil low pressure

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10
Q

An IDG that is electrically disconnected, can be reconnected in flight by pulling the IDG circuit breaker and pressing the appropriate IDG switch-light.
t
f

A

False

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11
Q

The aircraft electrical AC (Alternating Current) generators are rated at:
20 VAC, 400 HZ at 35 KVA

115 VAC, 400 HZ at 40 KVA

115 VAC, 400 HZ at 35 KVA

115 VAC, 30 HZ at 400 KVA

A

115 VAC, 400 HZ at 40 KVA

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12
Q

he ADG (Air Driven Generator) supplies emergency AC (Alternating Current) electrical power to:
1B hydraulic pump and AC service bus

2B hydraulic pump and AC bus 1

ADG Bus (to power hydraulic pump 3B) and AC ESS bus (to power essential flight instruments)

AC service bus only

A

ADG Bus (to power hydraulic pump 3B) and AC ESS bus (to power essential flight instruments)

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13
Q

The AC AVAIL/IN USE switch light on the flight deck permits:
APU power to be supplied to the aircraft AC electrical system

External power to be supplied to the aircraft AC electrical system

ADG power to be supplied to the aircraft AC electrical system

Engine driven generator power to be supplied to the aircraft AC electrical system

A

External power to be supplied to the aircraft AC electrical system

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14
Q

Two circuit breaker panels are on the flight deck. Circuit breaker panels CBP-5 and CBP-6 are located in the ______________ and __________________.
Forward galley
Aft equipment bay
Above the forward flight attendant seat
Forward equipment compartment

A

Aft equipment bay
Forward equipment compartment

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15
Q

If a generator trips off, you may be able to reset it using the associated GEN switch on the ELECTRICAL POWER control panel if the condition was transitory.
t
f

A

True

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16
Q

Which AC Buses are depicted on the AC ELECTRICAL synoptic page under normal operating conditions?
AC BUS 1
AC BUS 2
ADG Bus
AC ESS BUS
AC SERVICE BUS
AC EMER BUS

A

AC BUS 1
AC BUS 2
AC ESS BUS
AC SERVICE BUS

17
Q

The power source priority for AC BUS 1 is
APU GEN, GEN 1, GEN 2, External power
External power, GEN 1, GEN 2, APU GEN
GEN 1, APU GEN, GEN 2, External power
GEN 1, External Power, GEN 2, APU GEN

A

GEN 1, APU GEN, GEN 2, External power

18
Q

The Power Source priority for AC BUS 2 IS:
APU GEN, GEN 2, GEN 1, External power
External Power, GEN 2, GEN 1, APU GEN
External power, APU GEN, GEN 2, GEN 1
GEN 2, APU GEN, GEN 1, External power

A

GEN 2, APU GEN, GEN 1, External power

19
Q

The AC ESS BUS is normally powered by:
AC BUS 2
AC SERV BUS
AC BUS 1
ADG BUS

A

AC BUS 1

20
Q

What causes the deployment of the ADG
Loss of all DC power
Loss of power to the DC BATT Bus
Loss of power to AC BUS 1
Loss of all AC power

A

Loss of all AC power

21
Q

If AC power is lost during flight and then aircraft generator power is reestablished, pressing the _______ will allow the AC ESS BUS to re-establish normal connections.
The associated GEN Switch-light
PWR TXFR OVERRIDE button
AC AVAIL/IN USE button
The ADG power button

A

PWR TXFR OVERRIDE button

22
Q

The ADG is capable of powering the AC ESS BUS when speed is greater than _________.
135
120
150
110

A

135 KIAS

23
Q

The source of power for TRU 1 during normal operations is:
AC BUS 1
AC BUS 2
AC ESS BUS
AC SERV BUS

A

AC BUS 1

24
Q

The purpose of a TRU is to convert DC electric power to AC electric power
t
f

A

False

25
Q

The source of power for ESS TRU 2 under normal conditions is:
AC BUS 1
AC BUS 2
AC ESS BUS
AC SERV BUS

A

AC BUS 2

26
Q

During ADG operations, the DC ESS BUS get power from:
AC BUS 2 through TRU 2 and the cross ties
AC ESS BUS through TRU 1
AC ESS BUS through ESS TRU 1
AC BUS 2 through ESS TRU 1
AC ESS BUS through ESS TRU 1

A

AC ESS BUS through ESS TRU 1

27
Q

If all TRU power is unavailable, the ultimate source of power for the DC battery bus will be the main battery and the APU battery.
t
f

A

True

28
Q

In the event of a TRU 1 or TRU 2 failure, the MAIN TIE contractor will close and the _____________ is automatically shed.
DC SERV BUS
DC BUS 1
DC UTIL BUS
DC BUS 2

A

DC UTIL BUS

29
Q

The batteries can supply DC electrical power to the following buses:
DC ESS BUS
DC BATT BUS
DC EMER BUS
MAIN BATT DIR BUS
DC BUS 2
APU BATT DIR BUS

A

DC ESS BUS
DC BATT BUS
DC EMER BUS
MAIN BATT DIR BUS
APU BATT DIR BUS

30
Q

The main and APU batteries are capable of supplying approximately _____ minutes of DC emergency power.
15
30
45
60

A

30

31
Q

The DC SERV BUS is normally powered by _______.
ESS TRU 1
ESS TRU 2
TRU 2
TRU 1

A

TRU 2

Advanced Systems (27 decks)

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