B777 Air Systems

Boeing 777 Air Systems

Boeing 777 Air Systems Revised 10/7/24

1 / 15

In the standby cooling mode, what will the pack automatically do if the airplane is not in an area of sufficient cooling?

Decrease airflow to half rate.

Increase airflow through the pack

Shutoff the pack.

Fail the pack standby cooling controller.

2 / 15

What is the normal position of the aft outflow valve after landing?

In transit.

Full closed.

30 degrees open.

Full open.

3 / 15

Why should the CABIN TEMP control be set to mid position?

To set the maximum temperature in any zone.

To prevent cabin overheat during low altitude flight.

To set the actual temperature in cabin zones A-F

To allows ± 6˚C temperature range adjustment on cabin attendant panel.

4 / 15

Why should you minimize flight time at low altitude when the EQUIP COOLING OVRD message is displayed?

AFT & BULK cargo compartments may overheat.

Equipment & displays could fail.

Pack temperature would cause damage.

Recirculation fans may not cool equipment adequately.

5 / 15

What is the cabin altitude at maximum certified airplane operating altitude?

7,400 feet.

8,000 feet.

9,400 feet

9,000 feet.

6 / 15

What determines the pack outlmet temperature?

The temperature zone requiring the coolest temperature controls the pack outlet temperature.

The CABIN TEMERATURE selector.

All statements are correct.

The flight deck temperature selector.

7 / 15

Under normal conditions, what is the source of bleed air to start the second engine?

Engine.

Ground carts.

APU

Validate

8 / 15

How are cargo compartments controlled in terms of temperature ranges?

Low is 4°C to 10°C - High is 18°C to 24°C

Low is 0°C to 5°C - High is 15°C to 24°C

Low is 5°C to 10°C - High is 20°C to 25°C

Low is 10°C to 15°C - High is 25°C to 30°C

9 / 15

The LANDING ALTITUDE advisory message indicates which of the following?

The preset landing altitude is not correct.

A landing was made to different altitude.

The FMC does not supply a landing altitude or the landing altitude selector is pulled.

10 / 15

What happens if the forward equipment cooling primary supply fan fails?

The EICAS advisory message EQUIP COOLING is displayed.

The aft equipment cooling and ventilating system provides cooling.

The backup supply fan operates automatically.

The forward system reconfigures automatically to an override mode.

11 / 15

What happens when the BULK CARGO TEMPERATURE selector is positioned to HIGH?

The compartment temp. İs automatically kept approximately 7°C.

The compartment temperature is automatically kept at approximately 21°C.

The bulk cargo compartment ventilation fan operates continuously.

The compartment temperature is automatically kept at approximately 15°C.

12 / 15

If an overheat or other significant pack fault is detected, the pack shuts down automatically. An attempt to restore pack operation may not be made by pressing the AIR COND RESET switch.

False.

True.

13 / 15

Two outflow valves are installed: one forward and one aft. Normally, most of the outflow is through the forward outflow valve.

False.

True.

14 / 15

How many packs are there and what is their main function?

Three packs - providing cooling.

Four packs - controlling pressurization.

One pack - managing ventilation.

Two packs - cooling supplied hot bleed air.

15 / 15

How are zone target temperatures selected, and what is the temperature range?

Automatically adjusted based on the outside temperature with a temperature range between 15°C and 35°C.

Manually set by the flight crew with a temperature range between 18°C and 29°C.

Manually set by the cabin crew with a temperature range between 0°C and 30°C.

Automatically set by the system with a temperature range between 10°C and 40°C.

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