Boeing B777 – Air Systems - SmartCockpit - Airline training guides, Aviation, Operations, Safety

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

False.

True.

Correct! Wrong!

The cabin altitude limiter closes both outflow valves if cabin altitude exceeds:

13 500 ft

10 000 ft.

14 000 ft.

15 000 ft.

Correct! Wrong!

In flight, the cabin altitude controller operates in:

A cruise mode.

A climb mode.

All statements are correct.

A descent mode.

Correct! Wrong!

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

AFT and BULK cargo compartments may overheat.

Electronic Equipment and displays may fail.

Pack temperature would cause damage.

Recirculation fans may not cool equipment adequately.

Correct! Wrong!

If a duct leak is detected, the system automatically isolates the leak. The EICAS caution message BLEED LEAK is displayed. The automatic isolation logic may include:

One or two sequential steps

Betwwen one and four sequential steps.

One, two, or three sequential steps.

Correct! Wrong!

During isolation, the ENGINE and/or APU bleed switch OFF lights and the ISOLATION switch CLOSED lights illuminate and extinguish as the repective valves close and open.

What cabin differential pressure is scheduled for takeoff?

Equal to the outside pressure.

Slighlty negative.

Slighlty positive.

Zero.

Correct! Wrong!

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 200 ft.

Assumes a landing altitude of 2000 ft.

Assumes a landing altitude of 1000 ft.

Assumes a landing altitude of 1500 ft.

Correct! Wrong!

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.

Correct! Wrong!

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.

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.

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

Correct! Wrong!

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

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

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.

Correct! Wrong!

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

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

To prevent cabin overheat during low altitude flight

To set the maximum temperature in any zone.

To set the actual temperature in cabin zones A-F.

Correct! Wrong!

In the cabin altitude controller cruise mode, maximum cabin altitude is 8,000 feet. The cabin altitude controllers enter cabin altitude controller descent mode at T/D or at initial descent of approximately _____ from cruise altitude, regardless of T/D.

750 ft.

1000 ft.

1500 ft.

500 ft.

Correct! Wrong!

What landing altitude is displayed on the EICAS pressurization system indications when the airplane has traveled more than 400 miles or has passed the halfway point?

The destination airport altitude to the nearest 100 feet.

The departure airport altitude to the nearest 100 feet.

The alternate airport altitude to the nearest 50 feet.

The destination airport altitude to the nearest 500 feet.

Correct! Wrong!

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 15°C.

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

The bulk cargo compartment ventilation fan operates continuously.

Correct! Wrong!

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.

False.

True.

Correct! Wrong!

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

It removes power from the trim air system.

It allows the trim air valve to operate manually.

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

It removes control at the cabin attendant panel.

Correct! Wrong!

When does a visible orange lip indicate on a pressure relief valve?

Set cabin altitude to less than 8000 ft.

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

Advise maintenance of the open valve.

Position the landing altitude switch to AUTO.

Correct! Wrong!

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

35 000 ft.

33 000 ft.

37 000 ft.

39 000 ft.

Correct! Wrong!

What is the normal source of bleed air to start the second engine?

Ground cart(s)

APU.

Engine.

Correct! Wrong!

What is bleed air used for?

Pressurizing the hydraulics reservoir.

Pressurizing the hydraulics reservoir and sspirating the TAT probe.

Aspirating the TAT probe.

Correct! Wrong!

Which component can be reset by the air conditioning reset switch.

Packs only.

Reciculation fan switches only.

The entire air conditioning system.

Trim air valves and recirculation fans.

Correct! Wrong!

What happens when you select the FWR CARGO A/C control to AUTO?

Packs operate at reduced flow rate.

The EICAS advisory message CARGO A/C FWD is displayed.

The forward cargo heating system is shutoff and a selected temperature is displayed on the AIR synoptic.

Pack flow rate is modulated to achieve a pack outlet temperature between 5 and 43°C.

Correct! Wrong!

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, 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.

The mode is selected automatically.

Correct! Wrong!

Which of the following are landing elevation limits for B777?

2000 feet below to 13000 feet above sea level.

2000 feet below to 12000 feet above sea level.

1000 feet below to 14000 feet above sea level.

1000 feet below to 12000 feet above sea level.

Correct! Wrong!

If a pack overheats or fails the pack shuts down and an air conditioning may be needed.

True.

False.

Correct! Wrong!

When is the center bleed isolation valve open?

During climb and descent.

During single bleed source operation.

During engine start.

During descent.

Correct! Wrong!

If the cruise altitude is unavailable from the FMC in AUTO, the cabin altitude controllers assume a cruise altitude of 39,000 feet.

True.

False.

Correct! Wrong!

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

False.

True.

Correct! Wrong!

This improves ventilation and smoke removal. Cabin altitude and full ventilation rates can be maintained by either valve.

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

Bleed air pressure is inadequate.

The PACK switched is pushed on.

A pack or compressor outlet high temperature has occurred.

The pack valve is failed or closed.

Correct! Wrong!

What will cause the automatic closure of a bleed valve?

APU operation

Ground cart supplying bleed air.

Bleed air overtemp or overpressure.

Engine fire switch pulled.

Correct! Wrong!

What must be done to manually set a landing altitude?

Pull the manual landing elevation selector out then set the required altitude.

Check the FMC for automatic landing elevation adjustment.

Press the AUTO button on the cabin altitude controller

Adjust the trim air valves to the desired altitude.

Correct! Wrong!

When does the ground crew call horn sound?

When hydraulics systems are pressurized.

Before starting the engine.

When cooling of forward electronic electrical equipment is inoperative.

In case of APU fire.

Correct! Wrong!

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 the FWD CARGO FIRE ARM switch is ARMED.

When high air airflow is detected in flight.

Correct! Wrong!

Each trim air system supplies three zone supply ducts, with the left trim air system also supplying the flight deck.

False.

True.

Correct! Wrong!

What causes the trim air FAULT light to come on?

The pack flow control valves are commanded closed.

The trim air valve is commanded open

All statements are correct.

The trim air valve is commanded closed because of a zone supply duct overheat.

Correct! Wrong!

How does the trim air system meet zone temperature requirements?

It heats conditioned air.

It cools or heats conditioned air.

It controls pack air temperature.

It cools conditioned air.

Correct! Wrong!

Flight Deck Temperature (FLT DECK TEMP) selector in mid position sets the temperature to approximately 75°F (24°C)

False.

True

Correct! Wrong!

What action is required during preflight if the LANDING ALTITUDE EICAS message is displayed with the FWD and AFT OUTFLOW VALVE switches in AUTO?

Push the LDG ALT selector IN.

Select the FWD and AFT OUTFLOW valve switches to MAN.

Pull the LDG ALT

Push the LDG ALT selector OUT.

Correct! Wrong!

What protects the fuselage against excessive differential pressure?

Recirculation fans.

Positive and negative pressure relief valves.

Cabin altitude limiter.

Trim air valves

Correct! Wrong!

Whic trim air valve can be moved directly by the flight crew, and how is it monitored?

Right trim air valve - monitored through the air synoptic.

Cabin trim air valve - monitored through the flight deck temperature selector.

Flight trim air valve - through a manual positions of the flight deck temperature selector.

Left trim air valve - monitored through the engine display.

Correct! Wrong!

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

The backup supply fan operates automatically.

The aft equipment cooling and ventilating system provides cooling.

The EICAS advisory message EQUIP COOLING is displayed.

The forward system reconfigures automatically to an override mode.

Correct! Wrong!

When is the pack OFF light illuminated amber?

During engine start.

When the valve ıs failed closed.

All statements are true.

When there is a pack or compressor outlet high temperature condition.

Correct! Wrong!

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

9400 feet.

8000 feet.

7400 feet.

9000 feet.

Correct! Wrong!

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

OFF.

ON.

AUTO.

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

Correct! Wrong!

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.

True.

False.

Correct! Wrong!

After engine start, what is the correct position for the L ENG and R ENG BLEED AIR switches?

AUTO.

ON.

OFF.

Correct! Wrong!

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

Four packs - controlling pressurization.

Three packs - providing cooling.

Two packs - cooling supplied hot bleed air.

One pack - managing ventilation.

Correct! Wrong!

The LANDING ALTITUDE advisory message indicates which of the following?

The preset landing altitude is not correct.

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

A landing was made to different altitude.

Correct! Wrong!

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

AUTO.

OFF.

AUTO or OFF

Correct! Wrong!

The aft and bulk cargo compartments have independent bleed air heating systems. An insulated curtain separates the two compartments.

True.

False.

Correct! Wrong!

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

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

The pack temperature decreases.

It cancels input to the flight deck temperature controller.

It opens the flight deck trim air valve.

Correct! Wrong!

Landing altitude (normally provided by the FMC) can be manually set using the LANDING ALTITUDE selector. Landing field selection limits are _ below sea level to _ feet above sea level.

1500 ft and 16 000 ft.

1000 ft and 13 000 ft

2000 ft and 14 000 ft.

1000 ft and 15 000 ft.

Correct! Wrong!

What does the PACK MODE R EICAS message indicate?

The standby cooling mode is inoperative

The right pack is inoperative.

The airplane is in unfavorable conditions and right pack output temperature is too high.

The right pack is operating in the standby cooling mode.

Correct! Wrong!

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.

Correct! Wrong!

What determines the pack outlet temperature?

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

The CABIN TEMERATURE selector.

The flight deck temperature selector.

All statements are correct.

Correct! Wrong!

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.

Fail the pack standby cooling controller.

Increase airflow through the pack.

Shutoff the pack.

Correct! Wrong!

What is the function of the negative pressure relief vents?

They prevent negative pressure differential.

They regulate cabin pressure during climb.

They minimize cabin overpressure conditions.

They improve smoke removal ventilation.

Correct! Wrong!

What is the source of supplemental heat for the aft cargo compartment?

Forward equipment cooling exhaust air.

An independent bleed air heating system.

Left recirculation fan.

An electric heater.

Correct! Wrong!

With the CARGO TEMPERATURE selector set to LOW or HIGH, the respective cargo heat shutoff valve opens and the temperature control valve opens and closes to maintain the temperature in the compartment.

The lavatory/galley vent fans draw air across temperature sensors in each compartment. If both vent fans fail, cargo heat is not provided.

The lavatory/galley vent fans draw air across temperature sensors in each compartment.

The lavatory vent fans draw air across temperature sensors in each compartment. If both vent fans fail, cargo heat is still provided but at a low rate.

Correct! Wrong!

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

30 degrees open.

Full closed.

In transit.

Full open.

Correct! Wrong!

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

Recirculation fans may not cool equipment adequately.

AFT and BULK cargo compartments may overheat.

Pack temperature would cause damage.

Equipment and displays could fail.

Correct! Wrong!

Where is the target temperature for the air conditioning zones displayed?

On the upper EICAS display when pressurization is selected to MAN.

On the air synoptic.

On the lower EICAS display when pressurization is selected to MAN.

On the HYD synoptic.

Correct! Wrong!

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

Right pack - lower recirculation system.

Left pack - upper recirculation system.

APU bleed air - outflow valves.

Both packs - upper and lower recirculation systems.

Correct! Wrong!

Which system(s) supply trim air to the flight deck?

Right trim air system.

Both right and left trim air systems.

Center trim air system.

Left trim air system.

Correct! Wrong!

What system provides the heat for the forward cargo compartment?

The trim air system.

Bleed air from the engines.

Aft cargo heat system.

Exhaust from the equipment cooling system.

Correct! Wrong!

Which of the followings are bleed air sources?

Trim air.

Demand pump.

APU and Ground Cart.

Packs.

Correct! Wrong!

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 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

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

Correct! Wrong!

During climb, what parameter(s) schedule cabin altitude?

Airplane climb rate and flight plan cruise altitude.

Airplane flight altitude.

A constant pressure differential.

Airplane flight altitude and pressure altitude.

Correct! Wrong!

In flight, the normal source of bleed air for all systems except the engine anti-ice is the engine low stage compressor (at high power) or intermediate stage compressor (at low power).

False.

True.

Correct! Wrong!

What is the indication that an outflow valve is in manual control?

Red light on the air synoptic.

Green light on the outflow valve.

Amber 'M' on the outflow valve indications.

No indication. Manual control is not displayed.

Correct! Wrong!

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 prevent smoke from entering the flight deck.

To cool the equipment in the aisle stand.

Correct! Wrong!

Boeing B777 – Air Systems

Boeing B777 – Air Systems

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

The cabin altitude limiter closes both outflow valves if cabin altitude exceeds:

In flight, the cabin altitude controller operates in:

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

If a duct leak is detected, the system automatically isolates the leak. The EICAS caution message BLEED LEAK is displayed. The automatic isolation logic may include:

What cabin differential pressure is scheduled for takeoff?

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:

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.

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

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

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

In the cabin altitude controller cruise mode, maximum cabin altitude is 8,000 feet. The cabin altitude controllers enter cabin altitude controller descent mode at T/D or at initial descent of approximately _____ from cruise altitude, regardless of T/D.

What landing altitude is displayed on the EICAS pressurization system indications when the airplane has traveled more than 400 miles or has passed the halfway point?

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

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.

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

When does a visible orange lip indicate on a pressure relief valve?

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

What is the normal source of bleed air to start the second engine?

What is bleed air used for?

Which component can be reset by the air conditioning reset switch.

What happens when you select the FWR CARGO A/C control to AUTO?

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

Which of the following are landing elevation limits for B777?

If a pack overheats or fails the pack shuts down and an air conditioning may be needed.

When is the center bleed isolation valve open?

If the cruise altitude is unavailable from the FMC in AUTO, the cabin altitude controllers assume a cruise altitude of 39,000 feet.

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

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

What will cause the automatic closure of a bleed valve?

What must be done to manually set a landing altitude?

When does the ground crew call horn sound?

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

Each trim air system supplies three zone supply ducts, with the left trim air system also supplying the flight deck.

What causes the trim air FAULT light to come on?

How does the trim air system meet zone temperature requirements?

Flight Deck Temperature (FLT DECK TEMP) selector in mid position sets the temperature to approximately 75°F (24°C)

What action is required during preflight if the LANDING ALTITUDE EICAS message is displayed with the FWD and AFT OUTFLOW VALVE switches in AUTO?

What protects the fuselage against excessive differential pressure?

Whic trim air valve can be moved directly by the flight crew, and how is it monitored?

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

When is the pack OFF light illuminated amber?

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

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

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.

After engine start, what is the correct position for the L ENG and R ENG BLEED AIR switches?

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

The LANDING ALTITUDE advisory message indicates which of the following?

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

The aft and bulk cargo compartments have independent bleed air heating systems. An insulated curtain separates the two compartments.

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

Landing altitude (normally provided by the FMC) can be manually set using the LANDING ALTITUDE selector. Landing field selection limits are _____ below sea level to _____ feet above sea level.

What does the PACK MODE R EICAS message indicate?

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.

What determines the pack outlet temperature?

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

What is the function of the negative pressure relief vents?

What is the source of supplemental heat for the aft cargo compartment?

With the CARGO TEMPERATURE selector set to LOW or HIGH, the respective cargo heat shutoff valve opens and the temperature control valve opens and closes to maintain the temperature in the compartment.

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

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

Where is the target temperature for the air conditioning zones displayed?

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

Which system(s) supply trim air to the flight deck?

What system provides the heat for the forward cargo compartment?

Which of the followings are bleed air sources?

How are cargo compartments controlled in terms of temperature ranges?

During climb, what parameter(s) schedule cabin altitude?

In flight, the normal source of bleed air for all systems except the engine anti-ice is the engine low stage compressor (at high power) or intermediate stage compressor (at low power).

What is the indication that an outflow valve is in manual control?

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

Landing altitude (normally provided by the FMC) can be manually set using the LANDING ALTITUDE selector. Landing field selection limits are _ below sea level to _ feet above sea level.