A good battery should supply power to the hot battery bus and the emergency bus for approximately: a) 2 hours. b) 1 hour. c) 30 minutes. d) 10 minutes.
The battery bus serves as: a) A power-off DC source. b) An emergency power source. c) An extension bus. d) A generator tie bus.
In flight, with the generators on line, the battery is isolated from any charging source when the battery switch is in: a) OFF. b) BATT. c) EMER. d) A and C.
If manual termination of a start sequence is desired, the switch to press is: a) ENGINE START. b) STARTER DISENGAGE. c) LH START. d) RH START.
The voltage indicated on the volt meter with the selector switch in BATT is sensed from the: a) Battery bus. b) Left main bus . c) Hot battery bus. d) Right main bus.
If the generators are off line, the volt- meter reads battery voltage when the battery switch is in: a) OFF. b) BATT. c) EMER. d) B and C.
The light in each engine start button illuminates to indicate: a) Starting is complete. b) Opening of the start relay. c) Closing of the start relay. d) Generator disconnect.
The generator field relay opens when: a) An internal feeder fault is sensed. b) An overvoltage condition is sensed. c) An engine fire switch is activated. d) All of the above.
If battery starts are intended, the generator switches should be placed to: a) OFF. b) GEN. c) RESET. d) ON.
When the avionics power switches are positioned NORM and ON, normally: a) No. 1 inverter powers all AC buses. b) Both inverters are paralleled to supply power to all AC buses. c) No.2 inverter produces only26-VAC power. d) Each inverter powers its own AC buses.
Illumination of the AC FAIL annunciator light and the MASTER WARNING and MASTER CAUTION lights indicates: a) Failure of No.1 inverter. b) Failure of No.2 inverter. c) Failure of both inverters. d) Any of the above.
With the battery as the only source of power and the battery switch in the OFF position, the bus(es) powered are: a) Battery bus, hot battery bus. b) Emergency buses, battery bus. c) Hot battery bus. d) Emergency buses, battery bus, hot battery bus.
With the battery as the only source of power and the battery switch in the EMER position, the following bus(es) are powered: a) Battery bus, hot battery bus. b) Emergency buses, hot battery bus. c) Hot battery bus. d) Emergency buses, battery bus, hot battery bus.
With the battery as the only source of power and the battery switch in the BATT position, the following condition exists: a) The battery, emergency, and hot battery buses only receive power. b) All buses are powered except the emergency buses. c) LH and RH main DC buses only are powered. d) All DC buses are powered.
With only the hot battery and emergency buses powered, the following item is inoperative: a) NAV2. b) Engine instrument floodlight, emergency exit lights. c) Pilot’s standby HSI, COMM 1. d) NAV 1.
The correct statement is: a) With external power connected and the battery switch in OFF, all DC buses are powered from the external power unit. b) The battery switch must be out of the OFF position before the voltmeter will indicate the voltage of the hot battery bus. c) With external power connected and the battery switch in OFF, all DC buses are powered from the external unit except for the battery itself. d) The battery continues to charge with the generators on line regardless of the battery switch position.
Regarding the engine starting sequence (battery start on the ground): a) It is normally terminated by the pilot with the STARTER DISENGAGE button. b) The boost pump sand ignition switches must both be in the ON position before the start button is depressed. c) A minimum of 50% N2 is required on the operating engine prior to starting the second engine. d) It is terminated normally by the speed sensing switch on the starter/generator.
The incorrect statement is: a) Illumination of the STARTER DISENGAGE button is a function of the panel lights master switch. b) The generator switches are placed in the OFF position for an EPU start. c) The battery switch is placed in the OFF position prior to an EPU start. d) A failed LH 225 ampere current limiter prevents starting of the left engine.
Regarding a generator-assist start: a) It is necessary to observe a drop in amperage below 150 before depressing the second start button (to protect the 225 ampere current limiter). b) The operating generator’s switch must be placed to OFF before the start but- ton is depressed. c) A maximum of 49% N2 rpm is set on the operating engine. d) Select GRD IDLE HIGH on the operating engine.
Placing the battery switch in EMER with the generators on the line: a) Will not cause the immediate loss of any buses. b) Will cause loss of power to the emergency bus since the generators are on line. c) Will still provide charging power to the battery. d) Should result in the battery voltage remaining at 28.5 volts.
The correct statement regarding the GEN OFF L/R annunciator light is: a) Illumination of the light triggers the MASTER WARNING lights. b) The light illuminates whenever the power relay is open. c) Illumination of the light indicates both the power and field relays have opened. d) It indicates the starter/generator is in the start mode.
Ignition during engine start: a) Occurs immediately when the start button is depressed. b) Is initiated automatically by the speed sensing switch at 8 to 10% N2. c) Occurs when the throttle is brought to idle. d) Is terminated by the fuel control step modulator when it senses ITT above 300°C.
The BATT O’TEMP light comes on steady: a) But, will extinguish if the battery cools down. b) Will flash as the battery cools down. c) The battery switch should be placed to OFF (all buses continue to receive power). d) The MASTERWARNING lights will not illuminate until the BATT O’TEMP light begins to flash.
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