B777 Air Systems

Boeing 777 Air Systems

Boeing 777 Air Systems Revised 10/7/24

1 / 15

What system provides the heat for the forward cargo compartment?

Aft cargo heat system.

The trim air system.

Bleed air from the engines.

Exhaust from the equipment cooling system.

2 / 15

During preflight, what position should the APU BLEED AIR switch be in?

OFF.

ON.

OUT.

AUTO.

3 / 15

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

Full closed.

30 degrees open.

Full open.

In transit.

4 / 15

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

Full open.

30 degrees open.

In transit.

Full closed.

5 / 15

What is bleed air used for?

Both A & B.

Aspirating the TAT probe.

None of the above.

Pressurizing the hydraulic reservoirs.

6 / 15

Which statement(s) is (are) correct about the equipment cooling override mode?

The EICAS message EQUIP COOLING OVRD is displayed.

The mode is selected automatically.

There is a non normal procedure for this message.

All of the above is correct.

7 / 15

Which are the bleed air sources?

Demand pump.

Trim air.

Packs.

APU & ground cart.

8 / 15

How are cargo compartments controlled in terms of temperature ranges?

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

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

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

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

9 / 15

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

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

The bulk cargo compartment ventilation fan operates continuously.

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

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

10 / 15

If landing altitude is unavailable from the FMC (and not set in MAN), the EICAS advisory message LANDING ALT is displayed. The cabin altitude controller:

Assumes a landing altitude of 1000 ft.

Assumes a landing altitude of 2000 ft.

Assumes a landing altitude of 1500 ft.

Assumes a landing altitude of 200 ft.

11 / 15

During preflight, what position should the APU BLEED AIR switch be in?

AUTO or OFF

OFF.

AUTO.

12 / 15

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

True.

False.

13 / 15

What is the most correct statement about the equipment cooling override mode?

The EICAS message EQUIP COOLING OVRD is displayed and there is a non normal procedure to be performed.

The mode is selected automatically.

The mode is selected automatically, and the EICAS message EQUIP COOLING OVRD is displayed.

The mode is selected automatically, the EICAS message EQUIP COOLING OVRD is displayed. There is a non normal procedure for this message.

14 / 15

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

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

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

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

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

15 / 15

For Boeing 777, the APU Bleed Air is available at all altitudes.

False.

True.

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