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

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!

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.

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

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.

False.

True.

Correct! Wrong!

What is the function of the negative pressure relief vents?

They improve smoke removal ventilation.

They prevent negative pressure differential.

They minimize cabin overpressure conditions.

They regulate cabin pressure during climb.

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 500 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 100 feet.

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!

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.

Left trim air valve - monitored through the engine display.

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

Right trim air valve - monitored through the air synoptic.

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!

When does the ground crew call horn sound?

When hydraulics systems are pressurized.

In case of APU fire.

Before starting the engine.

When cooling of forward electronic electrical equipment is inoperative.

Correct! Wrong!

Which of the following are landing elevation limits for B777?

1000 feet below to 14000 feet above sea level.

2000 feet below to 13000 feet above sea level.

1000 feet below to 12000 feet above sea level.

2000 feet below to 12000 feet above sea level.

Correct! Wrong!

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

The entire air conditioning system.

Trim air valves and recirculation fans.

Reciculation fan switches only.

Packs only.

Correct! Wrong!

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

Right pack - lower recirculation system.

APU bleed air - outflow valves.

Left pack - upper recirculation system.

Both packs - upper and lower recirculation systems.

Correct! Wrong!

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

To set the maximum temperature in any zone.

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

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

To prevent cabin overheat during low altitude flight

Correct! Wrong!

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

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.

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

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.

500 ft.

1500 ft.

Correct! Wrong!

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

AUTO.

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

ON.

OFF.

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.

It cancels input to the flight deck temperature controller.

The pack temperature decreases.

It opens the flight deck trim air valve.

Correct! Wrong!

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.

Correct! Wrong!

What system provides the heat for the forward cargo compartment?

Bleed air from the engines.

The trim air system.

Exhaust from the equipment cooling system.

Aft cargo heat system.

Correct! Wrong!

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

When both supply fans fail in flight.

When the EQUIP COOLING switch is in OVRD.

When the FWD CARGO FIRE ARM switch is ARMED.

When high air airflow is detected in flight.

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 determines the pack outlet temperature?

The flight deck temperature selector.

All statements are correct.

The CABIN TEMERATURE selector.

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

Correct! Wrong!

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

Increase airflow through the pack.

Decrease airflow to half rate.

Fail the pack standby cooling controller.

Shutoff the pack.

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 normal source of bleed air to start the second engine?

Ground cart(s)

APU.

Engine.

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!

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 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!

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

Three packs - providing cooling.

One pack - managing ventilation.

Two packs - cooling supplied hot bleed air.

Four packs - controlling pressurization.

Correct! Wrong!

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

AUTO.

AUTO or OFF

OFF.

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?

Pull the LDG ALT

Push the LDG ALT selector OUT.

Push the LDG ALT selector IN.

Select the FWD and AFT OUTFLOW valve switches to MAN.

Correct! Wrong!

What protects the fuselage against excessive differential pressure?

Recirculation fans.

Cabin altitude limiter.

Trim air valves

Positive and negative pressure relief valves.

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 forward system reconfigures automatically to an override mode.

The EICAS advisory message EQUIP COOLING is displayed.

Correct! Wrong!

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

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

Packs operate at reduced flow rate.

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

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

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!

When is the center bleed isolation valve open?

During climb and descent.

During engine start.

During single bleed source operation.

During descent.

Correct! Wrong!

What must be done to manually set a landing 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.

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

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!

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

Full closed.

30 degrees open.

Full open.

In transit.

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 0°C to 5°C - High is 15°C to 24°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

Correct! Wrong!

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

Equipment and displays could fail.

Pack temperature would cause damage.

Recirculation fans may not cool equipment adequately.

AFT and BULK cargo compartments may overheat.

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.

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!

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

AFT and BULK cargo compartments may overheat.

Pack temperature would cause damage.

Electronic Equipment and displays may fail.

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, two, or three sequential steps.

Betwwen one and four sequential steps.

One or two 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.

When is the pack OFF light illuminated amber?

When the valve ıs failed closed.

During engine start.

All statements are true.

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

Correct! Wrong!

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

The pack valve is failed or closed.

A pack or compressor outlet high temperature has occurred.

Bleed air pressure is inadequate.

The PACK switched is pushed on.

Correct! Wrong!

In flight, the cabin altitude controller operates in:

A descent mode.

All statements are correct.

A climb mode.

A cruise mode.

Correct! Wrong!

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

14 000 ft.

13 500 ft

10 000 ft.

15 000 ft.

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!

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.

2000 ft and 14 000 ft.

1000 ft and 13 000 ft

1000 ft and 15 000 ft.

Correct! Wrong!

What will cause the automatic closure of a bleed valve?

Engine fire switch pulled.

APU operation

Ground cart supplying bleed air.

Bleed air overtemp or overpressure.

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 lower EICAS display when pressurization is selected to MAN.

On the air synoptic.

On the HYD synoptic.

Correct! Wrong!

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

8000 feet.

7400 feet.

9400 feet.

9000 feet.

Correct! Wrong!

What is bleed air used for?

Pressurizing the hydraulics reservoir and sspirating the TAT probe.

Aspirating the TAT probe.

Pressurizing the hydraulics reservoir.

Correct! Wrong!

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

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 and there is a non normal procedure to be performed.

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

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!

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

Airplane climb rate and flight plan cruise altitude.

A constant pressure differential.

Airplane flight altitude.

Airplane flight altitude and pressure altitude.

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 1000 ft.

Assumes a landing altitude of 2000 ft.

Assumes a landing altitude of 200 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 MAN and LDG ALT selector pushed IN.

OUTFLOW VALVE switches in AUTO 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!

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!

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

AUTO.

OFF.

ON.

Correct! Wrong!

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

Right trim air system.

Both right and left trim air systems.

Left trim air system.

Center trim air system.

Correct! Wrong!

What causes the trim air FAULT light to come on?

The trim air valve is commanded open

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

All statements are correct.

The pack flow control valves are commanded closed.

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!

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

True.

False.

Correct! Wrong!

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

False.

True.

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!

Which of the followings are bleed air sources?

APU and Ground Cart.

Trim air.

Demand pump.

Packs.

Correct! Wrong!

The LANDING ALTITUDE advisory message indicates which of the following?

The preset landing altitude is not correct.

A landing was made to different altitude.

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

Correct! Wrong!

Boeing B777 – Air Systems

Boeing B777 – Air Systems

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.

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

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.

What is the function of the negative pressure relief vents?

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

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

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

When does the ground crew call horn sound?

Which of the following are landing elevation limits for B777?

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

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

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

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

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.

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

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

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

What system provides the heat for the forward cargo compartment?

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

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 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 cabin differential pressure is scheduled for takeoff?

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

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

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 does the trim air system meet zone temperature requirements?

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

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

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?

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

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

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.

When is the center bleed isolation valve open?

What must be done to manually set a landing altitude?

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

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

How are cargo compartments controlled in terms of temperature ranges?

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

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

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.

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:

When is the pack OFF light illuminated amber?

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

In flight, the cabin altitude controller operates in:

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

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

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 will cause the automatic closure of a bleed valve?

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

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

What is bleed air used for?

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

What does the PACK MODE R EICAS message indicate?

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

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:

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

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

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

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

What causes the trim air FAULT light to come on?

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

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

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

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

Which of the followings are bleed air sources?

The LANDING ALTITUDE advisory message indicates which of the following?

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.