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

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

To cool the equipment in the aisle stand.

To prevent smoke from entering the flight deck.

To defog the forward windows.

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 removes power from the trim air system.

It allows the trim air valve to operate manually.

It removes control at the cabin attendant panel.

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!

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!

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

30 degrees open.

Full closed.

Full open.

In transit.

Correct! Wrong!

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

AUTO or OFF

OFF.

AUTO.

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!

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!

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.

When does the ground crew call horn sound?

When cooling of forward electronic electrical equipment is inoperative.

In case of APU fire.

Before starting the engine.

When hydraulics systems are pressurized.

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.

Electronic Equipment and displays may fail.

Pack temperature would cause damage.

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 13 000 ft

2000 ft and 14 000 ft.

1000 ft and 15 000 ft.

1500 ft and 16 000 ft.

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!

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

On the air synoptic.

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

On the HYD synoptic.

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

Correct! Wrong!

Which of the following are landing elevation limits for B777?

2000 feet below to 12000 feet above sea level.

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.

Correct! Wrong!

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

The bulk cargo compartment ventilation fan operates continuously.

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.

Correct! Wrong!

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

To prevent cabin overheat during low altitude flight

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.

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!

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

The mode is selected automatically.

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

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.

OFF.

AUTO.

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!

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

Select the FWD and AFT OUTFLOW valve switches to MAN.

Pull the LDG ALT

Push the LDG ALT selector IN.

Push the LDG ALT selector OUT.

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.

True.

False.

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!

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 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!

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

Left trim air system.

Center trim air system.

Right trim air system.

Both right and left trim air systems.

Correct! Wrong!

When is the center bleed isolation valve open?

During single bleed source operation.

During engine start.

During descent.

During climb and descent.

Correct! Wrong!

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

False.

True.

Correct! Wrong!

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

14 000 ft.

15 000 ft.

10 000 ft.

13 500 ft

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!

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

AFT and BULK cargo compartments may overheat.

Recirculation fans may not cool equipment adequately.

Equipment and displays could fail.

Pack temperature would cause damage.

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!

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 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!

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

It opens the flight deck trim air valve.

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.

Correct! Wrong!

What cabin differential pressure is scheduled for takeoff?

Slighlty negative.

Equal to the outside pressure.

Slighlty positive.

Zero.

Correct! Wrong!

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

True.

False.

Correct! Wrong!

What determines the pack outlet temperature?

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

The flight deck temperature selector.

All statements are correct.

The CABIN TEMERATURE selector.

Correct! Wrong!

What system provides the heat for the forward cargo compartment?

Aft cargo heat system.

The trim air system.

Exhaust from the equipment cooling system.

Bleed air from the engines.

Correct! Wrong!

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

Automatically adjusted based on the outside temperature with a temperature range between 15°C and 35°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 set by the system with a temperature range between 10°C and 40°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!

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

The EICAS advisory message EQUIP COOLING is displayed.

The aft equipment cooling and ventilating system provides cooling.

The forward system reconfigures automatically to an override mode.

The backup supply fan operates automatically.

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!

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 2000 ft.

Assumes a landing altitude of 200 ft.

Assumes a landing altitude of 1500 ft.

Assumes a landing altitude of 1000 ft.

Correct! Wrong!

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

A pack or compressor outlet high temperature has occurred.

Bleed air pressure is inadequate.

The PACK switched is pushed on.

The pack valve is failed or closed.

Correct! Wrong!

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

Red light on the air synoptic.

No indication. Manual control is not displayed.

Green light on the outflow valve.

Amber 'M' on the outflow valve indications.

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.

Left trim air valve - monitored through the engine display.

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.

Correct! Wrong!

How does the trim air system meet zone temperature requirements?

It heats conditioned air.

It controls pack air temperature.

It cools conditioned air.

It cools or heats conditioned air.

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 pulled out.

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

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

Correct! Wrong!

Which of the followings are bleed air sources?

Packs.

Demand pump.

Trim air.

APU and Ground Cart.

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!

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!

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

True.

False.

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 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.

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

Packs operate at reduced flow rate.

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

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 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.

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

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.

500 ft.

1500 ft.

750 ft.

1000 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:

One, two, or three sequential steps.

One or two sequential steps

Betwwen one and four 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.

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 will cause the automatic closure of a bleed valve?

Bleed air overtemp or overpressure.

APU operation

Ground cart supplying bleed air.

Engine fire switch pulled.

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 protects the fuselage against excessive differential pressure?

Positive and negative pressure relief valves.

Cabin altitude limiter.

Trim air valves

Recirculation fans.

Correct! Wrong!

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

Forward equipment cooling exhaust air.

An electric heater.

Left recirculation fan.

An independent bleed air heating system.

Correct! Wrong!

What is the function of the negative pressure relief vents?

They prevent negative pressure differential.

They minimize cabin overpressure conditions.

They regulate cabin pressure during climb.

They improve smoke removal ventilation.

Correct! Wrong!

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

7400 feet.

9400 feet.

9000 feet.

8000 feet.

Correct! Wrong!

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

Engine.

Ground cart(s)

APU.

Correct! Wrong!

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

35 000 ft.

39 000 ft.

33 000 ft.

37 000 ft.

Correct! Wrong!

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

Fail the pack standby cooling controller.

Decrease airflow to half rate.

Increase airflow through the pack.

Shutoff the pack.

Correct! Wrong!

When is the pack OFF light illuminated amber?

During engine start.

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

When the valve ıs failed closed.

All statements are true.

Correct! Wrong!

Boeing B777 – Air Systems

Boeing B777 – Air Systems

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

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

How are cargo compartments controlled in terms of temperature ranges?

The LANDING ALTITUDE advisory message indicates which of the following?

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

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

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 must be done to manually set a landing altitude?

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

When does the ground crew call horn sound?

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.

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

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

Which of the following are landing elevation limits for B777?

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

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

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

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

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

What causes the trim air FAULT light to come on?

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

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.

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

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

What does the PACK MODE R EICAS message indicate?

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

When is the center bleed isolation valve open?

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

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

What is bleed air used for?

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

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

In flight, the cabin altitude controller operates 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.

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

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

What cabin differential pressure is scheduled for takeoff?

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

What determines the pack outlet temperature?

What system provides the heat for the forward cargo compartment?

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

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 if the forward equipment cooling primary supply fan fails?

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

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:

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

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?

How does the trim air system meet zone temperature requirements?

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

Which of the followings are bleed air sources?

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

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

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

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

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.

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.

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:

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 will cause the automatic closure of a bleed 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.

What protects the fuselage against excessive differential pressure?

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

What is the function of the negative pressure relief vents?

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

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

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

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

When is the pack OFF light illuminated amber?

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.