BOOK TWO, BLOCK IV-ELECTRICAL SYSTEMS

Question 1

SAFETY, SHOCK

Answer 1

OCCURS WHEN CURRENT PASSES THROUGH THE BODY. CAN CAUSE DSIRUPTIONS OF BODYS ELECTRICAL FUNCTIONS.CAN STOP HEART, LUNGS OR BOTH CAUSING SEVERE INJURY OR DEATH.

Question 2

SAFETY, LOAD CENTERS

Answer 2

HIGH VOLTAGE AREAS. ALL ELECTRICAL POWER MUST BE REMOVED PRIOR TO ENETERING.

Question 3

BASIC ELECTRICAL THEORY; A.VOLTAGE

Answer 3

THE ELECTRICAL FORCE, WHICH CAUSES CURRENT TO FLOW IN A CIRCUIT. IT IS MEASURED IN VOLTS.

Question 4

BASIC ELECTRICAL THEORY,B.ELECTRICAL CURRENT

Answer 4

THE MOVEMENT OF ELECTRICAL CHARGE THROUGH THE ELECTRONIC CIRCUIT. CURRENT ISMEASURED IN AMPERES.

Question 5

BASIC ELECTRICAL THEORY, C. RESISTANCE

Answer 5

CAUSES OPPOSITION TO THE FLOW OF ELECTRICTY IN A CIRCUIT.

Question 6

BASIC ELECTRICAL THEORY, D. HERTZ

Answer 6

ELECTRICAL UNIT OF FREQENCY EQUAL TO ONE CYCLE PER SECOND.

Question 7

BASIC ELECTRICAL THEORY, E. BUS

Answer 7

A DISTRIBUTION POINT IN AN AIRCRAFT ELECTRICAL SYSTEM TO WHICH THE BATTERY AND THE GENERATORS ARE CONNECTED. COMPONENTS THEN DERIVE THEIR POWER FROM THE BUS.

Question 8

GENERATORS;P3C , AC GENERATOR

Answer 8

A GENERATOR MOUNTED IN EACH ENGINE REDUCTION GEAR DRIVE OF ENGINE 2, 3 , AND 4. THE ENGINE REDUCTION GEAR IS PROTECTED FROM POSSIBLE DAMAGE SHOULD THE GENERATOR SEIZE BY A SHEAR SECTION ON THE GENERATOR STUB SHAFT. A GEN OFF LIGHT INDICATOR LOCATED ON THE RIGHT INBOARD OVERHEAD FLIGHT STATION PANEL ILLUMINATES WITH A FAILURE OF ANY OF THE ENGINE DRIVEN GENERATORS.

Question 9

GENERATORS,APU AC GENERATOR

Answer 9

IDENTICAL TO GENERATORS USED ON 2, 3, AND4 EXCEPT FOR COOLING BELL HOUSING. A GEN OFF LIGHT INDICATOR LOCATED ON THE RIGHT INNOARD OVERHEAD FLIGHT STATION PANEL ILLUMINATES WITH A FAILURE OF THE APU GENERATOR.

Question 10

GENERATORS, P8A, AC

Answer 10

PRIMARY AC POWER IS PROVIDED BY TWO INTEGRATED DRIVE GENERATORS (IDGS).

Question 11

GENERATORS, P8A, APU

Answer 11

THE APU OPERATES A GENERATOR AND CAN SUPPLY POWER TO ALL AC BUSES ON THE GROUND AND INFLIGHT.

Question 12

DISTRIBUTION, P3C, SENSING RELAYS

Answer 12

EMPLOYED IN THE AC POWER DISTRIBUTION system to connect and control POWER TO THE BUSES. IDENTICAL AND INTERCHANGABLE AND DO NOT ENERGIZE UNLESS THE GENERATOR VOLTAGE AND FREQUENCY ARE CORRECT. LOCATED IN THE MAIN LOAD CENTER.

Question 13

DISTRIBUTION, P8A, SENSING RELAYS

Answer 13

EMPLOYED IN THE AC POWER DISTRIBUTION SYSTEMTO CONNECT CONTROL POWER TO THE BUSES. IDENTICAL AND INTERCHANGABLE AND DO NOT ENERGIZE UNLESS THE GENERATOR VOLTAGE AND FREQUENCY ARE CORRECT.

Question 14

CIRCUITS AND BREAKERS

Answer 14

CIRCUIT BREAKERS ARE INSTALLED ON PANELS THROUGHOUT THE AIRCRAFT TO PROTECT THE VARIOUS ELECTRICAL CIRCUITS. CURRENT LIMITERS ARE ALSO PROVIDED WHERE NECESSARY. CIRCUIT BREAKERS USED IN THE ELECTRICAL SYSTEM ARE OF THE PUSH- PULL TYPE.

Question 15

REGULATION,VOLTAGE REGULATOR AND SUPERVISORY PANEL

Answer 15

FOUR VR/SUPERVISORY PANELS IN THE MAIN LOAD CENTER. THEY ARE INDENTICAL AND INTERCHANGABLE. PROVIDES CONTROL OF THE GENERATOR AND CONNECTS IT TO THE BUS SYSTEM.

Question 16

BATTERIES, P3C

Answer 16

ONE 24-VOLT BATTERY LOCATED IN THE AFT SECTION OF THE NOSE WHEEL WELL IS NORMALLY USED FOR STARTING THE APU. THE BATTERY IS CAPABLE OF POWERING MOST DC BUSES FOR A LIMITED TIME IN THE EVENT ALL OTHER DC SOURCES FAIL. THE BATTERY RECIEVES A CONTINUOUS CHARGE UNDER NORMAL OPERATION.

Question 17

BATTERIES, P8A

Answer 17

TWO 24 VOLT NICKEL-CADMIUM BATTERIES, MAIN AND AUX, ARE LOCATED IN THE ELECTRONICS COMPARTMENT. THE BATTERIES CAN SUPPLY PART OF THE DC SYSTEM. THE AUX OPERATES IN PARALLEL WITH THE MAIN BATTERY WHEN THE BATTERY IS POWERING THE STANDBY SYSTEM. AT ALL OTHER TIMES, THE AUXILIARY BATTERY IS ISOLATED FROM THE POWER DISTRIBUTION SYSTEM. THE BATTERY RECIEVES A CONTINUOUS CHARGE UNDER NORMAL OPERTION.