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

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

False.

True.

Correct! Wrong!

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

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

Right trim air valve - monitored through the air synoptic.

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!

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

AUTO.

OFF.

AUTO or OFF

Correct! Wrong!

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

On the HYD synoptic.

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

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

On the air synoptic.

Correct! Wrong!

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

The aft equipment cooling and ventilating system provides cooling.

The forward system reconfigures automatically to an override mode.

The EICAS advisory message EQUIP COOLING is displayed.

The backup supply fan operates automatically.

Correct! Wrong!

The LANDING ALTITUDE advisory message indicates which of the following?

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

The preset landing altitude is not correct.

A landing was made to different altitude.

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 high air airflow is detected in flight.

When the FWD CARGO FIRE ARM switch is ARMED.

When both supply fans fail in flight.

Correct! Wrong!

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

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

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

Packs operate at reduced flow rate.

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

Correct! Wrong!

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

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.

Set cabin altitude to less than 8000 ft.

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.

1000 ft and 15 000 ft.

2000 ft and 14 000 ft.

1000 ft and 13 000 ft

1500 ft and 16 000 ft.

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 pushed 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 pulled out.

Correct! Wrong!

How does the trim air system meet zone temperature requirements?

It controls pack air temperature.

It cools or heats conditioned air.

It heats conditioned air.

It cools conditioned air.

Correct! Wrong!

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

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.

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

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

Correct! Wrong!

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

Correct! Wrong!

What system provides the heat for the forward cargo compartment?

The trim air system.

Exhaust from the equipment cooling system.

Bleed air from the engines.

Aft cargo heat system.

Correct! Wrong!

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

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

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 15°C.

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 alternate airport altitude to the nearest 50 feet.

The destination airport altitude to the nearest 100 feet.

The destination airport altitude to the nearest 500 feet.

The departure airport altitude to the nearest 100 feet.

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!

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

False.

True.

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 1500 ft.

Assumes a landing altitude of 200 ft.

Assumes a landing altitude of 2000 ft.

Assumes a landing altitude of 1000 ft.

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!

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 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.

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

Correct! Wrong!

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

OFF.

ON.

AUTO.

Correct! Wrong!

Which of the followings are bleed air sources?

Packs.

Trim air.

APU and Ground Cart.

Demand pump.

Correct! Wrong!

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

Electronic Equipment and displays may fail.

Pack temperature would cause damage.

AFT and BULK cargo compartments may overheat.

Recirculation fans may not cool equipment adequately.

Correct! Wrong!

What will cause the automatic closure of a bleed valve?

APU operation

Bleed air overtemp or overpressure.

Ground cart supplying bleed air.

Engine fire switch pulled.

Correct! Wrong!

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

Both packs - upper and lower recirculation systems.

APU bleed air - outflow valves.

Left pack - upper recirculation system.

Right pack - lower recirculation system.

Correct! Wrong!

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

Full open.

In transit.

30 degrees open.

Full closed.

Correct! Wrong!

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

True.

False.

Correct! Wrong!

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

Equipment and displays could fail.

AFT and BULK cargo compartments may overheat.

Recirculation fans may not cool equipment adequately.

Pack temperature would cause damage.

Correct! Wrong!

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

37 000 ft.

39 000 ft.

33 000 ft.

35 000 ft.

Correct! Wrong!

What determines the pack outlet temperature?

The flight deck temperature selector.

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

The CABIN TEMERATURE selector.

All statements are correct.

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.

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.

True.

False.

Correct! Wrong!

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

15 000 ft.

14 000 ft.

13 500 ft

10 000 ft.

Correct! Wrong!

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

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

ON.

AUTO.

OFF.

Correct! Wrong!

What must be done to manually set a landing altitude?

Press the AUTO button on the cabin altitude controller

Adjust the trim air valves to the desired altitude.

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

Check the FMC for automatic landing elevation adjustment.

Correct! Wrong!

What is bleed air used for?

Aspirating the TAT probe.

Pressurizing the hydraulics reservoir.

Pressurizing the hydraulics reservoir and sspirating the TAT probe.

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.

Increase airflow through the pack.

Fail the pack standby cooling controller.

Shutoff the pack.

Correct! Wrong!

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

One pack - managing ventilation.

Three packs - providing cooling.

Four packs - controlling pressurization.

Two packs - cooling supplied hot bleed air.

Correct! Wrong!

When does the ground crew call horn sound?

Before starting the engine.

When hydraulics systems are pressurized.

In case of APU fire.

When cooling of forward electronic electrical equipment is inoperative.

Correct! Wrong!

Which of the following are landing elevation limits for B777?

2000 feet below to 13000 feet above sea level.

1000 feet below to 14000 feet above sea level.

2000 feet below to 12000 feet above sea level.

1000 feet below to 12000 feet above sea level.

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

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.

It removes power from the trim air system.

Correct! Wrong!

What protects the fuselage against excessive differential pressure?

Positive and negative pressure relief valves.

Trim air valves

Cabin altitude limiter.

Recirculation fans.

Correct! Wrong!

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

It cancels input to the flight deck temperature controller.

It opens the flight deck trim air valve.

The pack temperature decreases.

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

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.

1000 ft.

750 ft.

1500 ft.

500 ft.

Correct! Wrong!

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

8000 feet.

9000 feet.

7400 feet.

9400 feet.

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!

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

A constant pressure differential.

Airplane flight altitude.

Airplane flight altitude and pressure altitude.

Airplane climb rate and flight plan cruise altitude.

Correct! Wrong!

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

The mode is selected automatically.

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.

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!

What is the function of the negative pressure relief vents?

They minimize cabin overpressure conditions.

They regulate cabin pressure during climb.

They improve smoke removal ventilation.

They prevent negative pressure differential.

Correct! Wrong!

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

True.

False.

Correct! Wrong!

When is the pack OFF light illuminated amber?

All statements are true.

When the valve ıs failed closed.

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

During engine start.

Correct! Wrong!

When is the center bleed isolation valve open?

During engine start.

During single bleed source operation.

During descent.

During climb and descent.

Correct! Wrong!

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

Left recirculation fan.

An independent bleed air heating system.

An electric heater.

Forward equipment cooling exhaust air.

Correct! Wrong!

What does the PACK MODE R EICAS message indicate?

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

The right pack is inoperative.

The right pack is operating in the standby cooling mode.

The standby cooling mode is inoperative

Correct! Wrong!

What causes the trim air FAULT light to come on?

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

The trim air valve is commanded open

All statements are correct.

The pack flow control valves are commanded closed.

Correct! Wrong!

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

True

False.

Correct! Wrong!

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

APU.

Engine.

Ground cart(s)

Correct! Wrong!

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

Center trim air system.

Left trim air system.

Right trim air system.

Both right and left trim air systems.

Correct! Wrong!

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

The entire air conditioning system.

Reciculation fan switches only.

Packs only.

Trim air valves and recirculation fans.

Correct! Wrong!

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

True.

False.

Correct! Wrong!

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

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!

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

To prevent smoke from entering the flight deck.

To defog the forward windows.

To cool the equipment in the aisle stand.

Correct! Wrong!

What cabin differential pressure is scheduled for takeoff?

Zero.

Equal to the outside pressure.

Slighlty negative.

Slighlty positive.

Correct! Wrong!

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

No indication. Manual control is not displayed.

Green light on the outflow valve.

Red light on the air synoptic.

Amber 'M' on the outflow valve indications.

Correct! Wrong!

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

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

To prevent cabin overheat during low altitude flight

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

To set the maximum temperature in any zone.

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 OUT.

Pull the LDG ALT

Select the FWD and AFT OUTFLOW valve switches to MAN.

Push the LDG ALT selector IN.

Correct! Wrong!

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

The pack valve is failed or closed.

The PACK switched is pushed on.

A pack or compressor outlet high temperature has occurred.

Bleed air pressure is inadequate.

Correct! Wrong!

Boeing B777 – Air Systems

Boeing B777 – Air Systems

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

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

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

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

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

The LANDING ALTITUDE advisory message indicates which of the following?

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

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

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

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.

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

How does the trim air system meet zone temperature requirements?

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

How are cargo compartments controlled in terms of temperature ranges?

What system provides the heat for the forward cargo compartment?

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

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?

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).

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

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:

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.

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.

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

Which of the followings are bleed air sources?

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

What will cause the automatic closure of a bleed valve?

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

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

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

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

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

What determines the pack outlet temperature?

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:

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.

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

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

What must be done to manually set a landing altitude?

What is bleed air used for?

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

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

When does the ground crew call horn sound?

Which of the following are landing elevation limits for B777?

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

What protects the fuselage against excessive differential pressure?

What happens if the FLT DECK TEMP control is moved to the 'C' 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 is the cabin altitude at maximum certified airplane operating altitude?

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

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

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

In flight, the cabin altitude controller operates in:

What is the function of the negative pressure relief vents?

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

When is the pack OFF light illuminated amber?

When is the center bleed isolation valve open?

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

What does the PACK MODE R EICAS message indicate?

What causes the trim air FAULT light to come on?

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

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

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

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

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

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.

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

What cabin differential pressure is scheduled for takeoff?

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

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

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

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

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.