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BỘ CÂU HỎI TRẮC NGHIỆM HỆ THỐNG ĐIỆN TÀU BAY
1. When combined with a CSD, a brushless three-phase AC generator is often referred to as: a. AN IDG.
b. A ’FREQUENCY WILD’ GENERATOR c. A COMPOUND GENERATOR
2. Câu hỏi 4: TRIP-FREE CIRCUIT-BREAKER CONTACTS:
a. CAN ALWAYS BE CLOSED WHILST A FAULT EXISTS
b. CANNOT BE CLOSED WHILST A FAULT EXISTS
c. ARE ONLY USED DURING MAINTENANCE.
3. Câu hỏi 5: STEPPING A POWER SUPPLY DOWN FROM 115 TO 26V AC WOULD NORMALLY BE ACHIEVED BY A: a. TRANSFORMER RECTIFIER UNIT b. INVERTER c. TRANSFORMER.
4. Câu hỏi 8: FOR TWIN ENGINE AIRCRAFT, IF AC BUS 1 IS SHORTED,
a. AC ESS BUS IS NO LONGER POWERED
b. AC ESS BUS IS POWERED AC BUS 2
c. AC ESS BUS IS POWERED BY STATIC INVERTER OR EMER GEN
5. Câu hỏi 11: MANUAL ACTION ON BUS TIE PUSHBUTTON (SWITCHED TO OFF) WILL:
a. PREVENT ALL GENERATORS FROM SUPPLYING TO NORMAL CONSUMERS
b. INHIBIT A CLOSURE OF THE BUS TIE POWER RELAYS
c. MAKE POWER SUPPLY FROM LEFT TO RIGHT SIDE OR VICE VERSA POSSIBLE
6. Câu hỏi 14: IN TWIN ENGINE AIRCRAFT, WHEN GENERATOR NO.1 FAILS, BUS
TIE SWITCHING WILL AUTOMATICALLY:
a. OPENS BUS TIE POWER RELAY 1 AND CLOSES BUS TIE POWER RELAY 2 1
b. CLOSES 2 BUS TIE POWER RELAYS
c. OPENS 2 BUS TIE POWER RELAYS
7. Câu hỏi 17: WHEN TWO IDGS IN TWIN ENGINE AIRCRAFT FAILS, DC EMER BUS IS SUPPLIED BY:
a. TR1 VIA DC BUS1 OR ESS TR VIA DC ESS BUS b. EMERGENCY GENERATOR c. BATTERY ONLY
d. TR2 VIA DC BUS2 OR ESS TR VIA DC ESS BUS
8. Câu hỏi 20: WHICH STATEMENT IS NOT TRUE FOR POWER SOURCE SWITCHING?
a. A POWER SOURCE SWITCHING ALWAYS OCCURS WHEN AN EXISTING POWER
SOURCE IS LOST OR WHEN A NEW POWER SOURCE BECOMES AVAILABLE.
b. AUTOMATIC SWITCHING TRANSFERS POWER SOURCES FOR FLIGHT OPERATION
WHEREAS MANUAL SWITCHING MAINLY TRANSFER GROUND POWER SOURCES.
c. POWER SOURCE SWITCHING IS PERFORMED BY GCUS OR GPCU VIA ELECTRICAL MOTORS
9. Câu hỏi 21: FOR TWIN ENGINE AIRCRAFT, IF DC BUS 1 FAILS, DC ESS BUS IS SUPPLIED BY: a. ESS TR b. TR1 c. TR2
10. Câu hỏi 23: A SINGLE-PHASE AC GENERATOR HAS TWELVE POLES AND IT
RUNS AT 600 R.P.M. WHICH ONE OF THE FOLLOWING GIVES THE OUTPUT FREQUENCY OF THE GENERATOR? a. 120HZ. b. 50HZ c. 60HZ
11. Câu hỏi 24: FUSES HAVE A RATING THAT DETERMINES THE:
a. MINIMUM CURRENT IT CAN CARRY WITHOUT OPENING
b. TIME TAKEN FOR THE FUSE TO RUPTURE.
c. MAXIMUM CURRENT IT CAN CARRY WITHOUT OPENING 2
12. Câu hỏi 25: HOW MUCH DOES THE POWER FOR FOUR ENGINE JET AIRCRAFT NEED? a. 300 KW b. 100 KW c. 200 KW d. 400 KW
13. Câu hỏi 26: Electrical power in aircraft is mainly used for:
a. Heating (galley, anti-icing); Lighting (cockpit, cabin, exterior); Electronic devices (computers,
controls, indications, sensors). Pumps and valves needs hydraulic power
b. Lighting (cockpit, cabin, exterior); Electronic devices (computers, controls, indications,
sensors). Heating needs hot air only
c. Heating (galley, anti-icing); Lighting (cockpit, cabin, exterior); Mechanical power (pumps,
valves, motion); Electronic devices (computers, controls, indications, sensors)
14. Câu hỏi 27: HOW MUCH POWER CAN THE EMERGENCY GENERATOR POVIDE? a. 65 KW b. 60 KW TO 90 KW c. 1 KW d. 5 KW
15. Câu hỏi 28: HOW IS POWER SOURCE SWITCHING PERFORMED? a. BY CONTROL POWER RELAYS b. BY BUS TIE RELAYS c. BY POWER SOURCE RELAYS
16. Câu hỏi 29: WHEN AIRCRAFT IS ENERGIZED BY APU, IF YOU DISCONNECT APU GCU, WHAT MIGHT HAPPEN?
a. CURRENT TRANSFORMER CONNECTED TO APU GCU IS DAMAGED b. NOTHING HAPPENS c. APU GCU IS DAMAGED
17. Câu hỏi 30: THE FUNCTION OF LOAD SHEDDING IS
a. INCREASE LOADS WHEN OPERATING PARRALLEL. 3
b. IMPROVES THE RELIABILITY OF THE POWER RELAYS
c. PREVENTS AN OVERLOAD OF THE ENGINES
d. Improves the reliability of the power relays and Prevents an overload of the power
18. Câu hỏi 31: DC POWER SOURCES ARE: a. APU AND BATTERIES
b. TR UNITS AND STATIC INVERTER c. BATTERIES d. TR UNITS AND BATTERIES e. TR UNITS
19. Câu hỏi 32: THE SLIP-RINGS IN AN AC GENERATOR PROVIDE A MEANS OF:
a. CONNECTING AN EXTERNAL CIRCUIT TO A ROTATING ARMATURE WINDING
b. PERIODICALLY REVERSING THE CURRENT PRODUCED BY AN ARMATURE WINDING.
c. SUPPORTING A ROTATING ARMATURE WITHOUT THE NEED FOR BEARINGS
20. Câu hỏi 33: IN ORDER TO PROVIDE A POWER SOURCE OF 115VAC, 400HZ, ENGINE
DRIVEN GENERATOR AND APU GENERATOR ARE INSTALLED IN THE AIRCRAFT. THEY ARE
a. ONLY DIFFERENT IN RATED POWER b. TOTALLY IDENTICAL
c. IDENTICAL IN FUNCTION BUT DIFFERENT IN OPERATION
21. Câu hỏi 34: AT TERMINAL BLOCK OF A GENERATOR INSTALLED IN MODERN AIRCRAFT, THERE ARE: a. 3 CABLES b. 5 CABLES c. 4 CABLES
22. Câu hỏi 35: THE FUNCTION OF STATIC INVERTER IS a. CONVERT 24V DC TO 115 V AC b. CONVERT 115V AC TO 28 V AC c. CONVERT 28VAC TO 115 V AC 4
d. CONVERT 115V THREE PHASES TO 28V DC
23. Câu hỏi 37: WHICH STATEMENT IS NOT TRUE FOR BUSES IN AIRCRAFT?
a. A BUS CONNECTS THE POWER SOURCE TO ALL THE ELECTRICAL CONSUMERS
WHICH USE THE SAME TYPE OF ELECTRICAL POWER
b. EACH BUS HAS A SPECIFIC NAME, WHICH ALLOWS US TO IDENTIFY THE
POWER SOURCE FOR THE BUS AND INDICATES WHETHER AC OR DC IS DISTRIBUTED
c. THERE ARE MANY BUSES IN AIRCRAFT, BUT THEY ALL HAVE THE SAME FUNCTION
d. THE AC BUS 1 CONNECT THE THE GENERATOR 1 TO THE AC CUSTOMERS
BELONG LEFT PART OF A320 AC DISTRIBUTION SYSTEMS.
24. Câu hỏi 38: A THREE-PHASE INDUCTION MOTOR HAS THREE PAIRS OF POLES
AND IS OPERATED FROM A 60 HZ SUPPLY. WHICH ONE OF THE FOLLOWING GIVES
THE MOTOR’S SYNCHRONOUS SPEED? a. 3600R.P.M. b. 1200R.P.M. c. 1800R.P.M.
25. Câu hỏi 39: TRUS ARE USED TO CONVERT WHAT FORMS OF ELECTRICAL POWER: a. DC INTO AC. b. AC INTO AC c. AC INTO DC
26. Câu hỏi 40: OUTPUT VOLTAGE OF ENGINE DRIVEN GENERATOR REMAINS 115VAC THANKS TO: a. CBMU
b. CONSTANT SPEED DRIVE (CSD) VIA CONTROL SIGNAL FROM GCU
c. EXCITER CURRENT VIA CONTROL SIGNAL FROM GCU 5