B777 Air Systems

Boeing 777 Air Systems

Boeing 777 Air Systems Revised 10/7/24

1 / 15

Why does the pressurization system schedule the cabin altitude slightly below airport field elevation for landing?

For structural reasons.

Both A and B are correct.

So the airplane will land somewhat pressurized.

So the airplane will land somewhat depressurized.

2 / 15

Why does the flight deck receive air from the left pack at a higher pressure than the passenger cabin?

To defog the forward windows.

To cool the equipment in the aisle stand.

To prevent smoke from entering the flight deck.

The pilots demand it.

3 / 15

What action is required if a visible orange lip on a pressure relief valve is displayed?

Set cabin altitude to less than 8000 ft.

Position the landing altitude switch to AUTO.

Advise maintenance of the open valve.

No action is required. The valve is in its normally closed position.

4 / 15

What happens if the FLT DECK TEMP control is moved to the 'C' position?

It opens the flight deck trim air valve.

It cancels input to the flight deck temperature controller.

The pack temperature decreases.

It closes the trim air valve and lowers the flight deck temperature.

5 / 15

What does the MAN position on the FLT DECK TEMP control do?

It causes the packs to provide air at an average mid temperature range.

It allows the trim air valve to operate manually.

It removes power from the trim air system.

It removes control at the cabin attendant panel.

6 / 15

What is bleed air used for? Select One Answer

Both A & B.

Pressurizing the hydraulics reservoir.

Aspirating the TAT probe.

7 / 15

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

The mode is selected automatically.

All of the above is correct.

There is a non normal procedure for this message.

The EICAS message EQUIP COOLING OVRD is displayed.

8 / 15

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

The bulk cargo compartment ventilation fan operates continuously.

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

The compartment temperature is automatically kept at approximately 7°C.

9 / 15

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

Validate

Ground carts.

APU

Engine.

10 / 15

Which of the following is false for the PACK Switch illuminating OFF?

A pack or compressor outlet high temperature has occurred.

The PACK switch is pushed on.

The pack valve is failed or closed.

Bleed air pressure is inadequate.

11 / 15

Where does air to the cabin come from, and what are the additional sources?

APU bleed air - outflow valves.

Left pack - upper recirculation system.

Right pack - lower recirculation system.

Both packs - upper and lower recirculation systems.

12 / 15

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

Pack temperature would cause damage.

Recirculation fans may not cool equipment adequately.

Electronic Equipment and displays may fail.

AFT and BULK cargo compartments may overheat.

13 / 15

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

OFF.

AUTO or OFF

AUTO.

14 / 15

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

False.

True.

15 / 15

If cruise altitude is unavailable from the FMC in AUTO, the cabin altitude controllers assume a cruise altitude of:

39 000 ft.

37 000 ft.

33 000 ft.

35 000 ft.

Your score is

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