Environmental control System And Pneumatics

Question 1

RAM AIR Ventilation is only used when

Answer 1

When the aircraft is unpressurized

Question 2

Cabin air outflow is controlled automatically by

Answer 2

The active CPC which maintains aircraft pressurization

Question 3

The pressurization system automatically pre-pressurizes the aircraft to

Answer 3

-150 feet

Question 4

Maximum negative differential pressure is

Answer 4

-0.5 psi

Question 5

If the cabin altitude reaches 14,000 feet the:

Answer 5

CPAM will trigger the oxygen system to auto deploy to the passengers

Question 6

On the ground, with Display Control Panel in “Normal,” what fan cools the cockpit displays?

Answer 6

GND Fan

Question 7

When the Press CONT switch light in pressed in…

Answer 7

It selects Manual Mode

Question 8

The Cabin Alt regulator, when selected UP….

Answer 8

Causes the outflow valve to open and increase cabin altitude

Question 9

When in Manual (Man) the pressurization read outs are displayed on

Answer 9

EICAS Primary Page

Question 10

The two safety valves located on the Aft Pressure Bulkhead

Answer 10

Provide over pressure and negative pressure relief

Question 11

During ground operations, the Ground Valve

Answer 11

Is used to assist in the cooling of the avionics and CRT screens

Question 12

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

Answer 12

6th or 10th stage

Question 13

The Right hand Pack normally supplies the

Answer 13

Passenger Cabin