Air Systems

Question 1

What are the required immediate action items for a cabin altitude warning horn inflight?

Answer 1

1. Oxygen Mask & Regulators….. ON & 100%
2. Crew Communications ………. Establish
3. Seatbelt Sign ………………….. ON

Question 2

Bleed air is obtained from the ____ & _____ stages of the compressor section of the engine.

Answer 2

5th; 9th

Question 3

When 5th low-stage pressure is insufficient, the ___ high-stage valve modulates open to maintain proper pressure.

Answer 3

9th

Question 4

The engine bleed air valve is normally DC power activated and ______ operated.

Answer 4

pneumatically

Question 5

The illumination of the BLEED TRIP OFF light indicates ________.

Answer 5

engine bleed air temperature or pressure exceeds a predetermined limit

Question 6

What occurs when the BLEED TRIP OFF light illuminates?

Answer 6

The respective engine bleed air valve closes automatically

Question 7

What precools engine bleed air?

Answer 7

A precooler, or heat exchanger

Question 8

What sources of air can be used to start the engine?

Answer 8

APU, ground air cart, and engine bleed air

Question 9

With the isolation valve switch in AUTO, both engine bleed air switches ON, and both air conditioning pack switches AUTO or HIGH, the isolation valve is _____.

Answer 9

closed

Question 10

With the isolation valve switch in AUTO, if either an engine bleed air switch or an air conditioning pack switch is positioned OFF, the isolation valve is _____.

Answer 10

Open

Question 11

Does the APU bleed air switch affect the isolation valve position?

Answer 11

No

Question 12

Does the APU bleed air valve, on the B737-800, automatically close when the APU is shut down?

Answer 12

Yes

Question 13

The APU bleed air valve is___ activated and ______ operated.

Answer 13

DC; pneumatically

Question 14

With the DUAL BLEED light illuminated, engine thrust must be _______.

Answer 14

limited to idle

Question 15

What causes a wing-body overheat condition?

Answer 15

a bleed air duct leak

Question 16

If a leak in the bleed duct from the APU occurs, which WING-BODY OVER HEAT light will illuminate?

Answer 16

Left

Question 17

With the ISOLATION VALVE switch in AUTO, the isolation valve _________ if either engine BLEED air or air condition PACK switch is positioned OFF.

Answer 17

automatically opens

Question 18

The Wing-Body Overheat (OVHT) TEST switch _____________.

Answer 18

() all answers are correct
() tests wing-body overheat detector circuit
() illuminates both WING-BODY OVERHEAT lights

Question 19

Conditioned air for the cabin comes from _________________.

Answer 19

either the aircraft air conditioning system or a preconditioned ground source

Question 20

Conditioned air from the ______, upstream of the mix manifold, flows directly to the flight deck.

Answer 20

Left pack

Question 21

Air from the left pack, air from the right pack, and air from the recirculation system is combined in the ________.

Answer 21

Mix manifold

Question 22

The APU can supply air for ________ on the ground for all operations

Answer 22

Two packs

Question 23

With the air conditioning PACK switches in AUTO and both packs are operating _________.

Answer 23

the packs provides “normal air flow”

Question 24

With the air conditioning PACK switches in AUTO and one pack is operating _________.

Answer 24

The operating pack provides high air flow

Question 25

With the air conditioning PACK switch in HIGH, _________.

Answer 25

the respective pack provides high air flow

Question 26

On the B737 -700, Anytime the pack valve closes, the air mix valves are driven to the _______ position automatically.

Answer 26

full cold

Question 27

On the B737 -700, In the automatic temperature mode, the ________ are operated by the automatic temperature controller.

Answer 27

air mix valves

Question 28

On the B737-700, the automatic temperature controller is bypassed when the temperature selector is positioned to ________.

Answer 28

Manual

Question 29

The ram air system is used to provide cooling for the __________ in the air conditioning systems.

Answer 29

Heat exchangers

Question 30

The RAM DOOR FULL OPEN light illuminates whenever the ram door is ___________.

Answer 30

fully open

Question 31

On a B737-700, a DUCT OVERHEAT light causes the appropriate air mix valve to drive ___________.

Answer 31

full cold

Question 32

On the B737-700, when a PACK TRIP OFF light illuminates, the pack valve ________.

Answer 32

automatically closes and the mix valv drives full cold

Question 33

M AIR133 – (6.20.30.9) | In a B737-700, a PACK TRIP OFF is caused by _________.

Answer 33

pack temperatures exceeding limits

Question 34

In a B737-800, what happens if an amber ZONE TEMP light illuminates?

Answer 34

the MASTER CAUTION light will illuminate and the trim air valve closes

Question 35

The recirculation fan system __________ the air conditioning load and the engine bleed air demand.

Answer 35

reduces

Question 36

What makes the equipment cooling OFF light illuminate?

Answer 36

loss of air flow due to failure of an equipment cooling fan

Question 37

The TRIP RESET switch resets the ______________.

Answer 37

all answers are correct * bleed trip off, pack trip off * duct overheat on b737-700 or the ZONE TEMP on the b737-800

Question 38

On the B737-800, the PACK light indicates _____________.

Answer 38

a pack trip pff or failure of both primary and standby pack controls

Question 39

The aircraft is pressurized by bleed air supplied to and distributed by _________.

Answer 39

the air conditioning system

Question 40

What is cabin air outflow controlled by?

Answer 40

the outflow valve and the overboard exhaust valve

Question 41

The main outflow valve is actuated by one of _____ DC motors and is the overboard exhaust exit for the majority of the air circulated through the passenger cabin.

Answer 41

three

Question 42

On the cabin altitude panel, which scale on the CABIN Altimeter (ATL) / Differential Pressure (DIFF PRESS) Indicator indicates the cabin altitude in feet?

Answer 42

inner scale

Question 43

On the cabin altitude panel, which scale on the CABIN Altimeter (ATL) / Differential Pressure (DIFF PRESS) Indicator indicates the differential pressure between cabin and ambient in psi?

Answer 43

outer scale

Question 44

How can the intermittent cabin altitude warning horn be cut out?

Answer 44

by pushing the ALTITUDE HORN CUTOUT switch

Question 45

At what cabin altitude will the intermittent cabin altitude warning sound?

Answer 45

10.000ft

Question 46

How is the cabin rate of climb displayed?

Answer 46

on the cabin rate of climb indicator

Question 47

On the Cabin Pressurization Panel, which modes automatically pressurize the aircraft?

Answer 47

AUTO & ALTN

Question 48

On the Cabin Pressurization Panel, the MAN mode controls aircraft pressurization _____________.

Answer 48

manually by the outflow valve switch

Question 49

On the Cabin Pressurization Panel, with the pressurization mode selector in the MAN mode, the outflow valve switch takes approximately _______ to move the outflow valve in the full range of motion

Answer 49

20 seconds

Question 50

On the Cabin Pressurization Panel, an illuminated amber AUTO FAIL light indicates _____________.

Answer 50

automatic pressurization system failure is detected

Question 51

On the Cabin Pressurization Panel, if both the amber AUTO FAIL light and the green ALTN light is illuminated, _________.

Answer 51

a single channel controller failure has ocurred

Question 52

The OFF SCHED DESCENT light indicates the aircraft began descent before having reached the planned cruise altitude. The controller programs the cabin ____________.

Answer 52

land at the takeoff field elevation withour further pilot inputs

Question 53

On the B737-700, the pack valve will close if the cooling cycle overheats and is associated with a PACK TRIP OFF light.

Answer 53

true