APU

The APU compartment is ventilated by

APU compressor by-pass air.

Air ducted from the APU intake door that is then exhausted through the eductor

A fan, mechanically driven from the APU gearbox

The APU compartment requieres no ventilation

The primary function of the APU is

To supply bleed air for main engine start

To supply bleed air for pressurization

To drive a 40 Kva generator

To augment trust for take-off

Fuel for the APU is provided via

A cross-flow/ APU pump drawing fuel from both wings

An APU pump drawing fuel from the left collector tank

Right engine fuel feed manifold through a negative g check valve

Both a and c are correct

The green AVAIL light in the APU start/stop swichlight means:

APU bleed air is available

APU is able to supple electrical loading

APU is running

APU BITE test is complete

The AVAIL green light illuminate in the APU control panel indicate:

APU is ready to accept electrical loading only

APU is available for electrical loading

APU is ready to be started

APU is ready to be shutdown

The APU supplies pneumatic power for

Wing anti-ice

Cowl anti-ice

Thrust reverse

Engines start air conditioning

The APU control system ensures priority is given to

Electrical loads

Pneumatic loads

RPM

Fuel

The APU gauges appear when

APU POWER/FUEL switch/light is pressed in

APU START/STOP switch/light is pressed in

Battery master is selected on

XFLOW/APU PUMP switch/light is pressed in

On ground, the APU is supplying both electrical and pneumatic power simultaneously.As EGT increases above EGT limit which of the following occur

Generator loads sheds

APU shuts down

LCV modulates towards close

Left and right air conditioning packs close

From normal APu shutdown, the controls which are used consist of

APU SHUTOFF button and APU XFLOW swichlights

APU STAR/STOP bwichlight and PWR/FUEL bwichlight

APU STAR/STOP bwichlight and APU GEN button.

XFLOW MAN swichlight and APU SHUTOFF button

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