Pneumatics/ Cabin conditioning 07 Flashcards
In a turbo-compressor or bootstrap system the cooling air is:
a.compressor air
b.cabin air
c.ram air
d.engine compressor air
c.ram air
A humidifier is fitted to:
a.ensure the cabin air is saturated at high altitude
b.extract moisture from the air
c.increase the moisture content in the air when operating at high altitude
d.filter the air
c.increase the moisture content in the air when operating at high altitude
If the forward oil seal on an axial flow compressor fails, cabin air will be:
a.fresher and cooler
b.contaminated
c.only feed to the passengers
d.recycled back to the engine
e.unaffected
b.contaminated
How is the (charge) air cooled in a bootstrap (turbo-compressor) system:
a.by passing it through a fuel heater
b.via an air cooled radiator
c.by expanding over the turbine
d.by expanding the air over the turbine and driving the compressor
d.by expanding the air over the turbine and driving the compressor
The heat exchanger cools the charge air by:
a.using ram air feed from a NACA duct
b.using engine compressor air
c.using cabin air
d.using air taken from the pack compressor
a.using ram air feed from a NACA duct
The air-conditioning pack cold air unit is more efficient than the heat exchangers
Select one:
True
False
False
Which of the following is the pneumatic air not used for:
a.pressurising the cabin
b.pressurising the potable (drinking) water tank
c.pressurising the hydraulic tank
d.anti-icing of the wings
e.demisting the flight deck window
f.pressuring the fuel tanks
f.pressuring the fuel tanks
The pneumatic system only provides air when all engines are running:
Select one:
True
False
False
The mechanical drive for a cabin compressor comes from the:
engine
The pneumatic air is taken from the engine LP compressor
Select one:
True
False
False
