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?

Both A and B are correct.

For structural reasons.

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 cool the equipment in the aisle stand.

To prevent smoke from entering the flight deck.

The pilots demand it.

To defog the forward windows.

3 / 15

During preflight, what position should the FWD and AFT OUTFLOW VALVE switches and LDG ALT selector be in?

OUTFLOW VALVE switches in MAN and LDG ALT selector pushed IN.

OUTFLOW VALVE switches in OFF and LDG ALT selector pushed IN.

OUTFLOW VALVE switches in AUTO and LDG ALT selector pushed IN.

OUTFLOW VALVE switches in AUTO and LDG ALT selector pulled out.

4 / 15

During normal bleed air operation, what position should the L, C, R ISLN BLEED AIR switches be in?

OFF

AUTO

L ISLN AUTO, R ISLN AUTO, C ISLN OFF.

ON.

5 / 15

What is the function of the negative pressure relief vents?

They improve smoke removal ventilation.

They regulate cabin pressure during climb.

They minimize cabin overpressure conditions.

They prevent negative pressure differential.

6 / 15

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

To set the actual temperature in cabin zones A-F

To set the maximum temperature in any zone.

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

To prevent cabin overheat during low altitude flight.

7 / 15

When does the ground crew call horn sound?

Before starting engines.

When hydraulics are pressurized.

When cooling of forward electronic/electrical equipment is inoperative.

In case of an APU fire.

8 / 15

When does the ground crew call horn sound?

When hydraulics are pressurized.

In case of APU fire.

When cooling of forward electronic/electrical equipment is inoperative.

Before starting engines.

9 / 15

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

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 7°C.

10 / 15

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

Validate

Engine.

APU

Ground carts.

11 / 15

Forward Equipment Cooling system does not reconfigure automatically to override mode automatically for which of the following?

When the EQUIP COOLING switch is in OVRD.

When both supply fans fail in flight.

When high air airflow is detected in flight.

When the FWD CARGO FIRE ARM switch is ARMED.

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.

True.

False.

13 / 15

Automatic ventilation of the Forward Cargo Compartment Air Conditioning System ensures that smoke and objectionable odors do not enter the flight deck or passenger cabin.

False.

True.

14 / 15

The controller uses ambient pressure and flight plan data from the FMC to calculate a cabin pressurization schedule. The schedule provides a comfortable cabin climb to cruise altitude.

False.

True.

15 / 15

If one pack is in standby cooling and the other pack is operating normally, the pack in standby cooling mode shuts down at lower altitudes and higher outside air temperatures when ambient conditions do not permit standby cooling.

True.

False.

Your score is

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