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737 Electrical System

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Title of test:
737 Electrical System

Description:
electrical System

Author:
AVATAR

Creation Date:
13/10/2020

Category:
Others
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Content:
How is the electrical system managed when a fault occurs? The electrical system monitors itself for faults and automatically disconnects a generator bus from its power source when electrical power is out of limits The crew must monitor electrical meters for faults a manually disconnect a generator bus from its power source when electrical power is out of limits The electrical system monitors itself for faults only on the ground, the crew must monitor electrical meters for faults while in flight.
What is the normal source of power for an AC TRANSFER bus? Opposite GEN bus Respective MAIN bus Respective GEN bus.
CONDITION: Both driven generators online; APU shutdown; BUS TRANSFER switch in the AUTO position. Which buses are not powered if #2 engine-driven generator trip off? All AC and DC buses on both sides Generator bus, Main bus, and Transfer buses on failed side Generator bus and main bus on failed side.
What is the power source for TR-3? AC Generator Bus #1 Main Bus #2 Main Bus 31.
What is the normal source of power for TRs 1 and 2? Respective AC TRANSFER buses Respective GEN buses Respective MAIN AC buses.
What is the backup source of power for DC Bus 1? #2 DC Bus @2 TR DC Standby bus and battery.
How does the TR 3 disconnect relay normally function? Automatically closes when the crew conducts a raw data approach Automatically closes when TR 1 fails to allow TR 2 to power the DC Bus 1 Automatically opens during an A/P or FD approach at glide slope capture.
What is the power source for the Hot battery bus when all aircraft are powered? Battery Charger Aircraft battery TR 3.
What is the normal source of power for the AC Ground Service Bus? # 1 Generator bus # 2 Generator bus # 2 main Bus.
What is the normal source of power for the battery bus? TR 1 TR 2 TR 3.
What is the normal source of power for the battery Charge? AC GRND SERVICE Bus # 1 MAIN Bus # 2 MAIN Bus.
The aircraft is in flight with only the battery for electric power. Where does the power come from for the AC and DC Standby buses? #2 Main bus for the AC Standby bus, and # 2 DC bus for the DC Standby bus State Inverter for the AC Standby Bus, and battery bus for the DC Standby Bus Battery charger through the Hot battery bus for both Standby Buses.
What is the alternate power source for the battery bus? TR 1 TR 2 Hot battery Bus.
What is the alternate source of power for the Hot battery bus when the normal power source is not available? Battery Battery charger External power.
What is the alternate power source for the Battery Charger Generator Bus 1 Ground Service Bus Main Bus 2.
What is the purpose of the CSD? Change constant engine speed into variable generator speed Change variable speed into constant generator drive speed Automatically disconnect generator drive with a feeder fault trip.
Which DC Selector position display DC amps? TR's 1,2,3, and BAT BAT BUS, and STBY PWR All selectable positions.
Which of the following must be accomplished to check the battery condition? Turn on the battery switch, place DC meter selector to BAT, check volts within limits Turn on the battery switch, place the DC meter selector to BAT BUS, check volts and amp within limits. Turn on the battery Switch, place DC meter selector to BAT, check volts, and frequency within limits.
How is a failure of TR 1 indicated with the TR 3 disconnect relay closed? 0 amps, 0 volts indicated on the DC meters at the TR 1 position. 0 volts, normal amps indicated on the DC meters at the TR 1 position. 0 Amps, normal volts indicated on the DC meter at the TR 1 position.
How would a failure of the static inverter ne indicated during the standby power check? 0 volts on the AC voltmeter and 0 cps on the AC frequency meter 0 amps indicated on the DC ammeter 0 volts indicated on DC volt meter.
What is the function of the ON position of the galley power switch? Powers respective galley from its associated Transfer Bus Powers all galleys when either Generator bus is powered Powers all galleys when both Generator Buses are powered.
With the battery switch ON, which statement is correct? This switch is the only means available for turning on the battery bus Both the battery bus and Switched Hot battery bus are powered Provides the only means available for turning on the battery bus.
Which statements describes establishing power to the Ground Service bus on the ground? GRD POWER AVAILABLE light on, GROUND SERVICE switch on APU GEN OFF BUS light on, GRD PWR switch ON GEN OFF BUS lights ON, GRD service sitch ON.
What does an illuminated STANDBY PWR OFF light indicate? The DC Standby bis is unpowered The AC Standby bus is unpowered The AC and DC Standby buses are unpowered.
What is the function of the AUTO position of the standby power switch with the loss of all AC power? Allows the Battery Charger to be the source of power for both Stand by buses inflight or on the ground Allows the BATTERY BUS to be the source of power for both Standby buses inflight Allows the SWITCHED HOT BATTERY bus to be source for both Standby buses inflight.
What does an illuminated CSD HIGH OIL TEMP light indicate? CSD oil temperature exceeds operating limits CSD ' IN " oil temperature is in the yellow caution range CSD 'RISE" oil temperature is in yellow caution range.
Which is correct for disconnecting a CSD? Hold generator drive disconnect switch to DISCONNECT for 3 seconds. The CSD may be re-engaged inflight at idle engine speed. Momentarily place generator drive disconnect switch to DISCONNECT. The CSD may be re-engaged by placing the switch guard down. Hold the generator drive disconnect switch to DISCONNECT momentarily. The CSD may re-engage on the ground by maintenance.
What does an illuminated GRD POWER AVAILABLE light indicate? Ground cart is plugged in and the external bus is powered Ground cart is plugged in and powering the aircraft buses Ground cart is plugged in and output is within limits.
What is the function of the ON position of the GRD PRW switch? Connects ground power directly to both Transfer buses if ground power is within voltage and frequency limits Connects ground power to both Generator buses if the ground power quality is correct Connects ground power directly to both Transfer buses regardless of ground power voltage and frequency limits.
What is the function of the OFF position of the BUS TRANSFER switch? Prevents operation of bus transfer relays, shed window heat & electric hydraulic pumps, prevent the charger from switching to main Bus 2, and opens TR 3 disconnect relay. Disconnect both Transfer Buses from their respective Generator Buses, prevents battery charger switching to alternate power, and opens TR 3 disconnect relay. Prevents operation of bus transfer relay, prevents battery charger from switching to main Bus 2, and opens TR 3 disconnect relay.
What does an illuminated BUS OFF amber light indicate? The APU generator is supplying the respective bus The respective generator bus is unpowered The engine pe APU generator is supplying the generator bus.
What does an illuminated TRANSFER BUS OFF light indicate? Respective Transfer Bus is unpowered Engine generator is not supplying the respective Transfer bus Transfer bus switch is in the OFF position.
What is the function of the APU generator switches Connects generator output to generator bus regardless of power quality Connects generator output to generator bus if power quality is correct Connects generator output to main bus if power quality is correct.
In-flight, the AC ground Service bus is powered by: Generator Bus 1 Main Bus1 Main Bus 2 Generator Bus 2.
Engine-driven generator maximum load is: 125 Amp 150 Amp 125 Amp ground, 150 Amp flight 150 Amp ground, 125 Amp flight.
In the air, galley power is available only when both generator buses are powered True False.
All power sources to a GEN BUS must be manually connected through the movement of a switch. True False.
What are the Transformer Rectifier operating parameters? 18-20 volts 24-30 volts 50-65 volts.
With a loss of all generators, a fully charged battery can supply power to the standby buses for at least 20' 30' 45' 60'.
On the ground, alternate power for the Standby buses requires: Standby power switch at BAT Bus transfer switch at OFF Bus transfer switch at AUTO Standby power switch at AUTO.
With the loss of normal AC power in flight, power for the Standby AC and Standby DC buses is automatically available from: Main bus 2 and TR 3 Transfer bus 2 and DC bus 2 Battery bus and Static inverter None of the answers are correct.
A ground service bus control switch, labeled "GROUND SERVICE" is located on the: Foward overhead panel External power receptacle panel Aft flight attendant panel Foward flight attendant panel.
An amber "BUS OFF" light is: Illuminated when TR 3 fails Illuminated when the corresponding GEN bus is powered Extinguished when the corresponding GEN bus is powered.
What is the maximum engine generator electrical load limit? 100 Amp 125 Amp 150 Amp.
What is the minimum battery voltage for an APU start? 22 volts 23 volts 24 volts 25 volts.
When a CSD LOW OIL PRESSURE or HIGH OIL TEMP light comes on, the system annunciator and master Caution lights illuminate. ELEC GEN ENG HYD.
THE LIGHT IS ILLUMINATED WHEN THE EXTERNAL AC BUS IS POWERED GRD POWER AVAILABLE BUSS OFF TRANSFER BUS OFF GEN OFF BUS.
WHAT IS THE BASIC AC POWER DISTRIBUTION? (300/500).
THE DRIVE LIGHT FOR AN IDG ILLUMINATES WHEN (700/800/900)?.
What is the maximum single-engine drive generator load for an 800 model aircraft on the ground? .
When a B737-700 model IDG os operating and the ID breaker is closed, the IDG output is connected to:.
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