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

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

It removes control at the cabin attendant panel.

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

It allows the trim air valve to operate manually.

It removes power from the trim air system.

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!

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 protects the fuselage against excessive differential pressure?

Trim air valves

Cabin altitude limiter.

Positive and negative pressure relief valves.

Recirculation fans.

Correct! Wrong!

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

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.

The backup supply fan operates automatically.

Correct! Wrong!

The LANDING ALTITUDE advisory message indicates which of the following?

The preset landing altitude is not correct.

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

A landing was made to different altitude.

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 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.

Manually set by the cabin crew with a temperature range between 0°C and 30°C.

Correct! Wrong!

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

Packs operate at reduced flow rate.

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.

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

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!

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 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 compartment temp. İs automatically kept approximately 7°C.

The bulk cargo compartment ventilation fan operates continuously.

Correct! Wrong!

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

Full open.

30 degrees open.

In transit.

Full closed.

Correct! Wrong!

What is the function of the negative pressure relief vents?

They regulate cabin pressure during climb.

They prevent negative pressure differential.

They improve smoke removal ventilation.

They minimize cabin overpressure conditions.

Correct! Wrong!

What must be done to manually set a landing 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.

Adjust the trim air valves to the desired altitude.

Correct! Wrong!

What does the PACK MODE R EICAS message indicate?

The standby cooling mode is inoperative

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.

Correct! Wrong!

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

Three packs - providing cooling.

Two packs - cooling supplied hot bleed air.

Four packs - controlling pressurization.

One pack - managing ventilation.

Correct! Wrong!

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

Push the LDG ALT selector IN.

Pull the LDG ALT

Select the FWD and AFT OUTFLOW valve switches to MAN.

Push the LDG ALT selector OUT.

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.

True.

False.

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.

An electric heater.

Left recirculation fan.

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.

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

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

On the air synoptic.

On the HYD synoptic.

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

Correct! Wrong!

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

It cancels input to the flight deck temperature controller.

The pack temperature decreases.

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

It opens the flight deck trim air valve.

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 maximum temperature in any zone.

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

To prevent cabin overheat during low altitude flight

Correct! Wrong!

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

AUTO or OFF

OFF.

AUTO.

Correct! Wrong!

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

Amber 'M' on the outflow valve indications.

No indication. Manual control is not displayed.

Green light on the outflow valve.

Red light on the air synoptic.

Correct! Wrong!

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

AUTO.

ON.

OFF.

Correct! Wrong!

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

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

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

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

The mode is selected automatically.

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!

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

9000 feet.

7400 feet.

8000 feet.

9400 feet.

Correct! Wrong!

What determines the pack outlet temperature?

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

All statements are correct.

The CABIN TEMERATURE selector.

The flight deck temperature selector.

Correct! Wrong!

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

Engine.

Ground cart(s)

APU.

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. If both vent fans fail, cargo heat is not provided.

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

Correct! Wrong!

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

Equipment and displays could fail.

Recirculation fans may not cool equipment adequately.

AFT and BULK cargo compartments may overheat.

Pack temperature would cause damage.

Correct! Wrong!

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

A pack or compressor outlet high temperature has occurred.

The pack valve is failed or closed.

The PACK switched is pushed on.

Bleed air pressure is inadequate.

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!

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!

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

15 000 ft.

13 500 ft

14 000 ft.

10 000 ft.

Correct! Wrong!

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

33 000 ft.

39 000 ft.

37 000 ft.

35 000 ft.

Correct! Wrong!

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

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

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

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

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

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).

True.

False.

Correct! Wrong!

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

Packs only.

The entire air conditioning system.

Reciculation fan switches only.

Trim air valves and recirculation fans.

Correct! Wrong!

What causes the trim air FAULT light to come on?

The trim air valve is commanded open

All statements are correct.

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

The pack flow control valves are commanded closed.

Correct! Wrong!

When is the pack OFF light illuminated amber?

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

When the valve ıs failed closed.

All statements are true.

During engine start.

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 1500 ft.

Assumes a landing altitude of 200 ft.

Assumes a landing altitude of 2000 ft.

Correct! Wrong!

What will cause the automatic closure of a bleed valve?

Bleed air overtemp or overpressure.

Ground cart supplying bleed air.

APU operation

Engine fire switch pulled.

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!

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.

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.

Left trim air valve - monitored through the engine display.

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!

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 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 departure airport altitude to the nearest 100 feet.

The destination airport altitude to the nearest 100 feet.

The alternate airport altitude to the nearest 50 feet.

The destination airport altitude to the nearest 500 feet.

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!

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

A constant pressure differential.

Airplane flight altitude and pressure altitude.

Airplane climb rate and flight plan cruise altitude.

Airplane flight altitude.

Correct! Wrong!

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

Right trim air system.

Left trim air system.

Both right and left trim air systems.

Center trim air system.

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.

2000 ft and 14 000 ft.

1000 ft and 13 000 ft

1500 ft and 16 000 ft.

1000 ft and 15 000 ft.

Correct! Wrong!

When is the center bleed isolation valve open?

During descent.

During climb and descent.

During single bleed source operation.

During engine start.

Correct! Wrong!

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

OFF.

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

AUTO.

ON.

Correct! Wrong!

What cabin differential pressure is scheduled for takeoff?

Slighlty negative.

Equal to the outside pressure.

Zero.

Slighlty positive.

Correct! Wrong!

In flight, the cabin altitude controller operates in:

All statements are correct.

A climb mode.

A cruise mode.

A descent mode.

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.

500 ft.

750 ft.

1500 ft.

Correct! Wrong!

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

False.

True.

Correct! Wrong!

How does the trim air system meet zone temperature requirements?

It cools or heats conditioned air.

It controls pack air temperature.

It cools conditioned air.

It heats conditioned air.

Correct! Wrong!

What system provides the heat for the forward cargo compartment?

Exhaust from the equipment cooling system.

Aft cargo heat system.

The trim air system.

Bleed air from the engines.

Correct! Wrong!

How are cargo compartments controlled in terms of temperature ranges?

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

Low is 0°C to 5°C - High is 15°C to 24°C

Low is 10°C to 15°C - High is 25°C to 30°C

Correct! Wrong!

Which of the following are landing elevation limits for B777?

2000 feet below to 13000 feet above sea level.

1000 feet below to 14000 feet above sea level.

1000 feet below to 12000 feet above sea level.

2000 feet below to 12000 feet above sea level.

Correct! Wrong!

When does the ground crew call horn sound?

When hydraulics systems are pressurized.

When cooling of forward electronic electrical equipment is inoperative.

In case of APU fire.

Before starting the engine.

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.

Shutoff the pack.

Fail the pack standby cooling controller.

Decrease airflow to half rate.

Correct! Wrong!

Which of the followings are bleed air sources?

Trim air.

Demand pump.

APU and Ground Cart.

Packs.

Correct! Wrong!

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

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!

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!

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

Recirculation fans may not cool equipment adequately.

Pack temperature would cause damage.

AFT and BULK cargo compartments may overheat.

Electronic Equipment and displays may fail.

Correct! Wrong!

Boeing B777 – Air Systems

Boeing B777 – Air Systems

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

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.

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 protects the fuselage against excessive differential pressure?

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

The LANDING ALTITUDE advisory message indicates which of the following?

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

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

What is bleed air used for?

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

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

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

What is the function of the negative pressure relief vents?

What must be done to manually set a landing altitude?

What does the PACK MODE R EICAS message indicate?

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

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

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

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:

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

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

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

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

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

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

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

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

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

What determines the pack outlet temperature?

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

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.

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

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

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

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

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:

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

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).

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

What causes the trim air FAULT light to come on?

When is the pack OFF light illuminated amber?

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:

What will cause the automatic closure of a bleed valve?

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

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

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

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

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?

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

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

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

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.

When is the center bleed isolation valve open?

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

What cabin differential pressure is scheduled for takeoff?

In flight, the cabin altitude controller operates in:

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.

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

How does the trim air system meet zone temperature requirements?

What system provides the heat for the forward cargo compartment?

How are cargo compartments controlled in terms of temperature ranges?

Which of the following are landing elevation limits for B777?

When does the ground crew call horn sound?

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

Which of the followings are bleed air sources?

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

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

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

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.