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

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!

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 normal source of bleed air to start the second engine?

APU.

Engine.

Ground cart(s)

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!

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

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.

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

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 determines the pack outlet temperature?

The CABIN TEMERATURE selector.

All statements are correct.

The flight deck temperature selector.

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

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 1000 ft.

Assumes a landing altitude of 2000 ft.

Assumes a landing altitude of 1500 ft.

Assumes a landing altitude of 200 ft.

Correct! Wrong!

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

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

Left trim air valve - monitored through the engine display.

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

Right trim air valve - monitored through the air synoptic.

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.

What must be done to manually set a landing altitude?

Check the FMC for automatic landing elevation adjustment.

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

Press the AUTO button on the cabin altitude controller

Adjust the trim air valves to the desired altitude.

Correct! Wrong!

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

Right pack - lower recirculation system.

Left pack - upper recirculation system.

Both packs - upper and lower recirculation systems.

APU bleed air - outflow valves.

Correct! Wrong!

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

False.

True.

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!

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

The destination airport altitude to the nearest 100 feet.

The destination airport altitude to the nearest 500 feet.

The alternate airport altitude to the nearest 50 feet.

The departure airport altitude to the nearest 100 feet.

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!

Which of the following are landing elevation limits for B777?

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.

2000 feet below to 13000 feet above sea level.

Correct! Wrong!

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

10 000 ft.

14 000 ft.

13 500 ft

15 000 ft.

Correct! Wrong!

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

39 000 ft.

33 000 ft.

35 000 ft.

37 000 ft.

Correct! Wrong!

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

Left recirculation fan.

An independent bleed air heating system.

Forward equipment cooling exhaust air.

An electric heater.

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.

Equipment and displays could fail.

AFT and BULK cargo compartments may overheat.

Pack temperature would cause damage.

Correct! Wrong!

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

Full closed.

In transit.

30 degrees open.

Full open.

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!

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 MAN and LDG ALT selector pushed IN.

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

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!

What system provides the heat for the forward cargo compartment?

Bleed air from the engines.

Exhaust from the equipment cooling system.

Aft cargo heat system.

The trim air system.

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 happens if the forward equipment cooling primary supply fan fails?

The aft equipment cooling and ventilating system provides cooling.

The EICAS advisory message EQUIP COOLING is displayed.

The backup supply fan operates automatically.

The forward system reconfigures automatically to an override mode.

Correct! Wrong!

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

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

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

To set the maximum temperature in any zone.

To prevent cabin overheat during low altitude 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.

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

Packs operate at reduced flow rate.

Correct! Wrong!

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

The PACK switched is pushed on.

A pack or compressor outlet high temperature has occurred.

Bleed air pressure is inadequate.

The pack valve is failed or closed.

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 5°C to 10°C - High is 20°C to 25°C

Low is 4°C to 10°C - High is 18°C to 24°C

Correct! Wrong!

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

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.

Set cabin altitude to less than 8000 ft.

Correct! Wrong!

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

A constant pressure differential.

Airplane climb rate and flight plan cruise altitude.

Airplane flight altitude.

Airplane flight altitude and pressure altitude.

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 OUT.

Push the LDG ALT selector IN.

Correct! Wrong!

What is the function of the negative pressure relief vents?

They regulate cabin pressure during climb.

They improve smoke removal ventilation.

They prevent negative pressure differential.

They minimize cabin overpressure conditions.

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!

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 both supply fans fail in flight.

When high air airflow is detected in flight.

When the EQUIP COOLING switch is in OVRD.

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!

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

False.

True.

Correct! Wrong!

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

Packs only.

Reciculation fan switches only.

Trim air valves and recirculation fans.

The entire air conditioning system.

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!

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

1500 ft and 16 000 ft.

1000 ft and 15 000 ft.

2000 ft and 14 000 ft.

1000 ft and 13 000 ft

Correct! Wrong!

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

Right trim air system.

Left trim air system.

Center trim air system.

Both right and left trim air systems.

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.

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!

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

False.

True.

Correct! Wrong!

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

Four packs - controlling pressurization.

One pack - managing ventilation.

Two packs - cooling supplied hot bleed air.

Three packs - providing cooling.

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!

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

True

False.

Correct! Wrong!

What causes the trim air FAULT light to come on?

The pack flow control valves are commanded closed.

All statements are correct.

The trim air valve is commanded open

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

Correct! Wrong!

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

AUTO or OFF

AUTO.

OFF.

Correct! Wrong!

When is the pack OFF light illuminated amber?

All statements are true.

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

When the valve ıs failed closed.

During engine start.

Correct! Wrong!

What does the PACK MODE R EICAS message indicate?

The right pack is inoperative.

The right pack is operating in the standby cooling mode.

The standby cooling mode is inoperative

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

Correct! Wrong!

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

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

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

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

Correct! Wrong!

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

It opens the flight deck trim air valve.

It cancels input to the flight deck temperature controller.

The pack temperature decreases.

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

Correct! Wrong!

What cabin differential pressure is scheduled for takeoff?

Slighlty negative.

Zero.

Equal to the outside pressure.

Slighlty positive.

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

It removes power from the trim air system.

It allows the trim air valve to operate manually.

It removes control at the cabin attendant panel.

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

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!

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

On the HYD synoptic.

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.

Correct! Wrong!

How does the trim air system meet zone temperature requirements?

It cools conditioned air.

It heats conditioned air.

It cools or heats conditioned air.

It controls pack air temperature.

Correct! Wrong!

Which of the followings are bleed air sources?

APU and Ground Cart.

Packs.

Trim air.

Demand pump.

Correct! Wrong!

When is the center bleed isolation valve open?

During engine start.

During single bleed source operation.

During climb and descent.

During descent.

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!

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!

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.

1000 ft.

750 ft.

Correct! Wrong!

In flight, the cabin altitude controller operates in:

A climb mode.

A cruise mode.

All statements are correct.

A descent mode.

Correct! Wrong!

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 defog the forward windows.

To prevent smoke from entering the flight deck.

Correct! Wrong!

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

9400 feet.

9000 feet.

8000 feet.

7400 feet.

Correct! Wrong!

Boeing B777 – Air Systems

Boeing B777 – Air Systems

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

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 normal source of bleed air to start the second engine?

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

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

What protects the fuselage against excessive differential pressure?

What determines the pack outlet temperature?

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?

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

What must be done to manually set a landing altitude?

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

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

The LANDING ALTITUDE advisory message indicates which of the following?

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

Which of the following are landing elevation limits for B777?

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

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

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

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

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

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.

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

Automatic ventilation of the Forward Cargo Compartment Air Conditioning System ensures that smoke and objectionable odors do not enter the flight deck or passenger cabin.

What system provides the heat for the forward cargo compartment?

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

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

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

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

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

How are cargo compartments controlled in terms of temperature ranges?

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

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

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 is the function of the negative pressure relief vents?

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.

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

What is bleed air used for?

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

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

When does the ground crew call horn sound?

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.

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

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

What will cause the automatic closure of a bleed valve?

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

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

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

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

What causes the trim air FAULT light to come on?

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

When is the pack OFF light illuminated amber?

What does the PACK MODE R EICAS message indicate?

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

What cabin differential pressure is scheduled for takeoff?

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

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

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.

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

How does the trim air system meet zone temperature requirements?

Which of the followings are bleed air sources?

When is the center bleed isolation valve open?

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

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

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.

In flight, the cabin altitude controller operates in:

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

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

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.