Pneumatics

Question 1

APU air is available in flight up to an altitude of approximately ____.

Answer 1

22,000 feet

Question 2

The Equipment cooling system draws air from___.

Answer 2

the cabin

Question 3

If CACTS Control of Cabin Temperature Zones fail, pack flow rate is modulated to achieve a pack outlet temperature between ____ and ____ degrees F.

Answer 3

40, 110

Question 4

The left and right body bleed air pressurizes the ____.

Answer 4

C1 and C2 air driven hydraulic pumps

Question 5

The expanded air display is presented on the EICAS when __________.

Answer 5

the air synoptic is displayed on an MFD

Question 6

On the ground, if the equipment cooling system is inoperative, ____.

Answer 6

the ground crew call horn sounds and an EICAS message appears

Question 7

The APU bleed air switch is normally left in the ____ position.

Answer 7

AUTO

Question 8

The aft and bulk cargo compartment temperatures are controlled via lavatory/galley vent fans which pull air across temperature sensors for each compartment. If both vent fans fail, the cargo heat system ________.

Answer 8

is not provided

Question 9

Equipment cooling will automatically switch to the override mode when ____.

Answer 9

the forward cargo fire extinguishing system is armed

Question 10

What is the maximum pressure altitude for an APU to Pack takeoff?

Answer 10

6900

Question 11

The AIR synoptic shown here indicates a bleed air loss in the ____ duct.

Left and Center body isolation valves closed

Answer 11

left body

Question 12

45. Refer to the synoptic. With a left body duct loss, which air driven hydraulic pump(s) (ADPs) is/are still available?

Answer 12

C2 ADP

Question 13

Using info presented on this synoptic, with the APU running, is APU air available for other bleed air functions

Answer 13

APU air is not available for any bleed air function.