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The Electronic Control Box (ECB) is primarily a full authority digital electronic controller that performs the APU system logic for all modes of APU operation such as:

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The APU has an integral independent lubrication system for lubrication and cooling.

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The basic element of the APU is a single shaft gas turbine which delivers _____ power for driving the accessory gearbox (electrical generator) and produces bleed air (engine starting and pneumatic supply).

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When starting the APU, the FUEL LO PR indication appears amber when an APU fuel low pressure is detected.

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The APU is supplied from the:

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The LOW OIL LEVEL advisory pulses in _____ if the APU oil quantity approaches its minimum value.

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Can the APU be used with wing anti-ice on?

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After 3 starter motor duty cycles, you shall wait 30 minutes before attempting 3 more cycles.

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After 3 starter motor duty cycles, you shall wait 60 min before attempting 3 more cycles.

With battery power only, what would an APU fire test look like?

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To start the APU the:

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The ECB (Electronic Control Box) controls the APU fuel flow.

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What is the maximum altitude at which the APU may be started using the batteries only?

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If an APU start is initiated on battery power only, is fire protection available?

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How many APU fire extinguisher bottles are installed?

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Can the APU FIRE test be performed with the APU running?

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Automatic shutdown of APU on ground will not occur while crew is performing this test.

When the APU Master Switch is released, a normal APU shutdown occurs:

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The starter engages if the air intake is closed and the MASTER SW and the START pushbuttons are ON.

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Fire on ground or in flight will cause the APU MASTER SW pushbutton FAULT light to come on.

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Nobody is in the cockpit, and there is an APU FIRE, which statement is correct?

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With the engines off, if the AVAIL light is illuminated on both the APU START push button and the EXT PWR push button, what is the source of electrical power for the aircraft busses?

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What is the maximum operating altitude of the APU?

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Maximum altitude for APU bleed operation is:

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The APU may obtain power for starting from:

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When the APU is running, the APU fuel pump:

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The APU cannot be shut down from outside the aircraft.

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The APU MASTER SW FAULT light will illuminate:

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When the APU MASTER SW is selected ON:

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The APU system page will appear on the ECAM:

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When selected on, the APU START push button, will:

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The APU may be started and operated even if the LOW OIL LEVEL ECAM advisory is displayed. Maintenance action is required within next _____ of APU operation.

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With battery power, what would an APU fire test look like?

Correct! Wrong!

BAT 1 and 2 push buttons do not need to be selected ON if external power is available.

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If APU bleed was used, after a manual shut down sequence, the APU:

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A FLAP OPEN indication is displayed in amber when the APU air inlet flaps is fully open.

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On ground, can you start the APU using the aircraft batteries only?

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Airbus A320 – APU