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Flashcards in Environmental Deck (15)
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0
Q

RAM AIR ventilation is used only when

A

Both packs have failed

1
Q

The right hand pack normally supplies the

A

Passenger cabin

2
Q

Flight compartment exhaust air in flight is routed through the

A

Under floor through the avionics bay to the outflow valve at aft press bulkhead

3
Q

Cabin air outflow valve is controlled automatic by

A

The active CPC maintains aircraft pressurization

4
Q

The pressurization system automatically pre-pressurizes the aircraft to

A

-150 feet

5
Q

Maximum negative differential pressure control is

A

-0.5 psi

6
Q

If the cabin altitude reaches 14,000 feet the

A

CPAM will trigger the oxygen system auto deploy to the passengers

7
Q

On the ground, with display control panel in “normal” what fan cools the cockpit displays

A

GRD fan/ FLT ALT fan

8
Q

When the pressurization control switch light is pressed in

A

It selects manual mode

9
Q

The manual cabin altitude regulator, when selected up

A

Causes the outflow valve to OPEN and INCREASE cabin altitude

10
Q

When in manual MAN the pressurization readouts are displayed on

A

EICAS primary page

11
Q

CABIN PRESSURE aural warning will be heard when

A

Cabin altitude is greater than 10,000 feet

12
Q

The two safety valves located on the aft pressure bulkhead

A

Provide over pressure and negative pressure relief

13
Q

During ground operations the ground valve

A

Is used to cool avionics and FWD CRTs and equipment

14
Q

What is the normal source for engine supply bleed air to the manifold

A

6th or 10th stage