Electrical Flashcards
(31 cards)
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
115VAC
400HZ at 40KVA
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
AC BUS 2 and SERV BUS
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
Over/under voltage
over/under frequency
generator or bus fails
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
MAIN BATT DIR BUS, APU BATT DIR BUS, DC EMER BUS, DC BATT BUS
The ADG Bus provides power to __________ via the ADG bus:
Hydraulic pump 3B
Pitch Trim Ch 1
Both A & B
Neither A or B
Hydraulic pump 3B
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
24 volts rated at 43 ampere hours
The DC EMER BUS is always displayed on the DC ELECTRICAL synoptic page
t
f
False
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
Variable engine speed to constant generator speed
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
IDG oil overheats
IDG oil low pressure
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
False
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
115 VAC, 400 HZ at 40 KVA
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
ADG Bus (to power hydraulic pump 3B) and AC ESS bus (to power essential flight instruments)
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
External power to be supplied to the aircraft AC electrical system
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
Aft equipment bay
Forward equipment compartment
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.
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f
True
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
AC BUS 1
AC BUS 2
AC ESS BUS
AC SERVICE BUS
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
GEN 1, APU GEN, GEN 2, External power
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
GEN 2, APU GEN, GEN 1, External power
The AC ESS BUS is normally powered by:
AC BUS 2
AC SERV BUS
AC BUS 1
ADG BUS
AC BUS 1
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
Loss of all AC power
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
PWR TXFR OVERRIDE button
The ADG is capable of powering the AC ESS BUS when speed is greater than _________.
135
120
150
110
135 KIAS
The source of power for TRU 1 during normal operations is:
AC BUS 1
AC BUS 2
AC ESS BUS
AC SERV BUS
AC BUS 1
The purpose of a TRU is to convert DC electric power to AC electric power
t
f
False
