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

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

False.

True.

Correct! Wrong!

What is the function of the negative pressure relief vents?

They minimize cabin overpressure conditions.

They improve smoke removal ventilation.

They regulate cabin pressure during climb.

They prevent negative pressure differential.

Correct! Wrong!

What protects the fuselage against excessive differential pressure?

Cabin altitude limiter.

Positive and negative pressure relief valves.

Trim air valves

Recirculation fans.

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!

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!

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 500 feet.

The destination airport altitude to the nearest 100 feet.

The departure airport altitude to the nearest 100 feet.

Correct! Wrong!

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

Shutoff the pack.

Increase airflow through the pack.

Decrease airflow to half rate.

Fail the pack standby cooling controller.

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!

When does the ground crew call horn sound?

When hydraulics systems are pressurized.

Before starting the engine.

In case of APU fire.

When cooling of forward electronic electrical equipment is inoperative.

Correct! Wrong!

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

One pack - managing ventilation.

Two packs - cooling supplied hot bleed air.

Three packs - providing cooling.

Four packs - controlling pressurization.

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 12000 feet above sea level.

1000 feet below to 14000 feet above sea level.

2000 feet below to 12000 feet above sea level.

Correct! Wrong!

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

False.

True.

Correct! Wrong!

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

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

Packs operate at reduced flow rate.

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.

Correct! Wrong!

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

Pack temperature would cause damage.

AFT and BULK cargo compartments may overheat.

Recirculation fans may not cool equipment adequately.

Electronic Equipment and displays may fail.

Correct! Wrong!

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

Center trim air system.

Both right and left trim air systems.

Right trim air system.

Left trim air system.

Correct! Wrong!

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

Full closed.

30 degrees open.

In transit.

Full open.

Correct! Wrong!

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

Airplane climb rate and flight plan cruise altitude.

Airplane flight altitude and pressure altitude.

Airplane flight altitude.

A constant pressure differential.

Correct! Wrong!

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

ON.

OFF.

AUTO.

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

Correct! Wrong!

What must be done to manually set a landing altitude?

Adjust the trim air valves to the desired altitude.

Press the AUTO button on the cabin altitude controller

Check the FMC for automatic landing elevation adjustment.

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

Correct! Wrong!

When is the center bleed isolation valve open?

During descent.

During single bleed source operation.

During engine start.

During climb and descent.

Correct! Wrong!

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

39 000 ft.

35 000 ft.

37 000 ft.

33 000 ft.

Correct! Wrong!

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

To set the maximum temperature in any zone.

To prevent cabin overheat during low altitude flight

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

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

Correct! Wrong!

Which of the followings are bleed air sources?

APU and Ground Cart.

Demand pump.

Packs.

Trim air.

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!

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 causes the trim air FAULT light to come on?

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

The pack flow control valves are commanded closed.

The trim air valve is commanded open

All statements are correct.

Correct! Wrong!

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

The pack temperature decreases.

It cancels input to the flight deck temperature controller.

It opens the flight deck trim air valve.

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

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 IN.

Select the FWD and AFT OUTFLOW valve switches to MAN.

Push the LDG ALT selector OUT.

Correct! Wrong!

What will cause the automatic closure of a bleed valve?

Ground cart supplying bleed air.

Bleed air overtemp or overpressure.

APU operation

Engine fire switch pulled.

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 operating in the standby cooling mode.

The standby cooling mode is inoperative

The right pack is inoperative.

Correct! Wrong!

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

9000 feet.

7400 feet.

8000 feet.

9400 feet.

Correct! Wrong!

What system provides the heat for the forward cargo compartment?

Exhaust from the equipment cooling system.

The trim air system.

Aft cargo heat system.

Bleed air from the engines.

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

False.

True.

Correct! Wrong!

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 control at the cabin attendant panel.

It removes power from the trim air system.

Correct! Wrong!

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

AUTO.

AUTO or OFF

OFF.

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!

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!

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

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

On the air synoptic.

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

On the HYD synoptic.

Correct! Wrong!

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

OFF.

AUTO.

ON.

Correct! Wrong!

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.

Correct! Wrong!

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

The entire air conditioning system.

Packs only.

Reciculation fan switches only.

Trim air valves and recirculation fans.

Correct! Wrong!

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

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

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.

Correct! Wrong!

How does the trim air system meet zone temperature requirements?

It heats conditioned air.

It cools conditioned air.

It cools or heats conditioned air.

It controls pack air temperature.

Correct! Wrong!

In flight, the cabin altitude controller operates in:

All statements are correct.

A descent mode.

A cruise mode.

A climb mode.

Correct! Wrong!

What cabin differential pressure is scheduled for takeoff?

Slighlty positive.

Zero.

Equal to the outside pressure.

Slighlty negative.

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. There is a non normal procedure for this message.

The mode is selected automatically, and the EICAS message EQUIP COOLING OVRD is displayed.

The EICAS message EQUIP COOLING OVRD is displayed and there is a non normal procedure to be performed.

The mode is selected automatically.

Correct! Wrong!

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

When the FWD CARGO FIRE ARM switch is ARMED.

When high air airflow is detected in flight.

When both supply fans fail in flight.

When the EQUIP COOLING switch is in OVRD.

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.

True.

False.

Correct! Wrong!

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

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

Correct! Wrong!

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

The backup supply fan operates automatically.

The forward system reconfigures automatically to an override mode.

The aft equipment cooling and ventilating system provides cooling.

The EICAS advisory message EQUIP COOLING is displayed.

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!

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.

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.

Correct! Wrong!

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

Set cabin altitude to less than 8000 ft.

Advise maintenance of the open valve.

Position the landing altitude switch to AUTO.

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

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 1500 ft.

Assumes a landing altitude of 1000 ft.

Assumes a landing altitude of 2000 ft.

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.

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

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

Left trim air valve - monitored through the engine display.

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 bulk cargo compartment ventilation fan operates continuously.

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

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 10°C to 15°C - High is 25°C to 30°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!

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.

1500 ft.

500 ft.

750 ft.

1000 ft.

Correct! Wrong!

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

Bleed air pressure is inadequate.

The pack valve is failed or closed.

The PACK switched is pushed on.

A pack or compressor outlet high temperature has occurred.

Correct! Wrong!

What determines the pack outlet temperature?

The flight deck temperature selector.

The CABIN TEMERATURE selector.

All statements are correct.

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

Correct! Wrong!

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.

AFT and BULK cargo compartments may overheat.

Equipment and displays could fail.

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.

1500 ft and 16 000 ft.

1000 ft and 13 000 ft

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:

Betwwen one and four sequential steps.

One, two, or three 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.

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!

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 is the pack OFF light illuminated amber?

When the valve ıs failed closed.

All statements are true.

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

During engine start.

Correct! Wrong!

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

Left recirculation fan.

An electric heater.

An independent bleed air heating system.

Forward equipment cooling exhaust air.

Correct! Wrong!

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

Ground cart(s)

Engine.

APU.

Correct! Wrong!

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

Amber 'M' on the outflow valve indications.

Red light on the air synoptic.

Green light on the outflow valve.

No indication. Manual control is not displayed.

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!

Boeing B777 – Air Systems

Boeing B777 – Air Systems

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

What is the function of the negative pressure relief vents?

What protects the fuselage against excessive differential pressure?

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

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.

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

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.

When does the ground crew call horn sound?

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

Which of the following are landing elevation limits for B777?

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

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

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

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

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

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

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?

When is the center bleed isolation valve open?

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

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

Which of the followings are bleed air sources?

The LANDING ALTITUDE advisory message indicates which of the following?

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 causes the trim air FAULT light to come on?

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

What will cause the automatic closure of a bleed valve?

What does the PACK MODE R EICAS message indicate?

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

What system provides the heat for the forward cargo compartment?

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

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

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

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

What is bleed air used for?

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

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

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

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

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

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

How does the trim air system meet zone temperature requirements?

In flight, the cabin altitude controller operates in:

What cabin differential pressure is scheduled for takeoff?

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

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.

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

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

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

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

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:

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

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

How are cargo compartments controlled in terms of temperature ranges?

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.

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

What determines the pack outlet temperature?

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

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.

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

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?

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

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

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

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.

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.