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SV > Study Guide: Air Systems > Flashcards

Study Guide: Air Systems Flashcards

1
Q

757: The ISOLATION VALVE light is illuminated. What does this indicate?

a) The isolation valve has overheated
b) The isolation valve is open
c) The isolation valve is not in the commanded position
d) The isolation valve has sensed an overpressure

A

The isolation valve is not in the commanded position

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2
Q

757: The right DUCT LEAK light is illuminated. What does this indicate?

a) The engine bleed system pressure is excessive
b) A high temperature bleed air leak is detected
c) A bleed air leak in the engine anti-ice duct is detected
d) Overpressure is detected in either wing anti-ice duct

A

A high temperature bleed air leak is detected

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3
Q

757: The right engine BLEED AIR OFF light is illuminated. What is the position of the right engine bleed air valve?

a) Closed
b) In transit
c) Open
d) Unable to be determined using the graphic

A

Closed

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4
Q

757: The right engine BLEED light is illuminated. What does this indicate?

a) The right engine bleed air valve is failed close
b) The right engine high pressure valve is open at low engine thrust
c) The right engine low pressure valve is closed
d) The right engine bleed air temperature is excessive

A

The right engine bleed air temperature is excessive

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5
Q

757: The APU BLEED AIR VALVE light is illuminated and EICAS advisory message APU BLEED VAL is displayed. What does this indicate?

a) The APU bleed air valve is open
b) The APU bleed air valve is closed
c) The APU bleed air valve is operating normally
d) The APU bleed air valve is not in the commanded position

A

The APU bleed air valve is not in the commanded position

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6
Q

767: The right engine bleed air overheat (OVHT) light is illuminated. What does this indicate?

a) An engine bleed air overheat
b) A high temperature bleed air leak is detected
c) The HPSOV and/or PRV valve has failed in the full open position
d) The engine bleed system pressure is excessive

A

An engine bleed air overheat

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7
Q

757/767: The engine bleed air valves (pressure regulating and shut off valve [PRSOV]) are __________________.

a) Electrically controlled and pressure actuated
b) Pressure controlled and pressure actuated
c) Pressure controlled and electrically actuated
d) Electrically controlled and electrically actuated

A

Electrically controlled and pressure actuated

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8
Q

757: The left engine HI STAGE light is illuminated. What does this indicate?

a) The left engine bleed system temperature is excessive and the engine high pressure bleed air valve is automatically locked open
b) The left engine bleed system temperature is excessive and the engine high pressure bleed air valve is automatically locked closed
c) The left engine bleed system pressure is excessive and the engine high pressure bleed air valve is automatically locked open
d) The left engine bleed system pressure is excessive and the engine high pressure bleed air valve is automatically locked closed

A

The left engine bleed system pressure is excessive and the engine high pressure bleed air valve is automatically locked closed

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9
Q

757/767: The pressurization system is in the automatic mode when the cabin altitude mode selector is set to AUTO 1 or AUTO 2. According to the graphic, what would the
pressurization system do if the AUTO 2 controller were to fail?

a) The AUTO INOP light illuminates
b) Cabin altitude automatically descends to 4000 feet
c) Control is automatically switched to the MAN controller
d) Control is automatically switched to the AUTO 1 controller

A

Control is automatically switched to the AUTO 1 controller

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10
Q

757/767: On the ground, when does the pressurization system begin pressurizing the aircraft?

a) When the airplane passes 400 feet RA
b) When the airplane passes 50 feet RA
c) When the throttles are advanced for the takeoff
d) At nose strut extension plus 20 seconds or 400 feet RA, whichever occurs first

A

When the throttles are advanced for the takeoff

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11
Q

757/767: The AUTO INOP light is illuminated. According to the graphic, what could cause this?

a) AUTO 2 is inoperative
b) AUTO 1 is inoperative
c) The AUTO RATE knob was moved beyond the index mark
d) Both AUTO controllers have failed

A

Both AUTO controllers have failed

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12
Q

757/767: The AUTO RATE knob sets limit for cabin altitude rate of climb or descent when mode selector is in AUTO 1 and AUTO 2 modes. Index mark establishes approximately ___ FPM climb and ___ FPM descent limits.

A

500, 300

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13
Q

757/767: What will occur if the selected (AUTO 1 or AUTO 2) pressurization controller
fails?

A

Control is automatically switched to the other controller

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14
Q

757/767: If a return to the departure airport is necessary, how must the crew set the pressurization system?

a) The MAN position must be selected on the controller and manual operation used for landing
b) The opposite AUTO position used for takeoff must be selected
c) The AUTO RATE knob must be moved to the index position for landing
d) The landing altitude must be reset for return to the departure airport

A

The landing altitude must be reset for return to the departure airport

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15
Q

757/767: On the cabin altitude control panel, the AUTO INOP light is illuminated. What can cause this?

a) The AUTO RATE knob is moved beyond the index mark
b) AUTO 1 is inoperative
c) MODE SELECT switch is in MAN
d) AUTO 2 is inoperative

A

MODE SELECT switch is in MAN

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16
Q

753/767: The aircraft is divided into ___ temperature zones.

A

4

17
Q

757: The two cargo compartments are heated by discharge air that flows along the outside walls of the compartment. When supplemental heating of the aft cargo compartment is required, it is accomplished by:

a) An electric heater in the duct downstream of the fan
b) Air from the FWD cargo compartment
c) A pneumatic heat fan
d) Discharge air from the FWD equipment

A

An electric heater in the duct downstream of the fan

18
Q

757/767: The FWD CAB compartment temperature INOP light is illuminated. What is a possible cause for it’s illumination?

a) Fault or overheat in the zone temperature controller
b) The associated accessory panel switch is in the TEST position
c) The left recirculation fan is off or inoperative
d) The right recirculation fan is off or inoperative

A

Fault or overheat in the zone temperature controller

19
Q

757/767: If there were to be excessive pack outlet temperature, which light would illuminate?

a) INOP only
b) PACK OFF only
c) TRIM AIR
d) PACK OFF and INOP

A

INOP only

20
Q

757: Air is circulated through the forward E/E racks by one of two supply fans. If the operating fan fails, what starts the alternate fan?

a) High temperature detected in the forward E/E compartment
b) Low airflow detected in the forward equipment cooling system on the ground
c) Pressing the EQUIP COOLING switch to the ALTN position
d) The overboard exhaust valve opens

A

Pressing the EQUIP COOLING switch to the ALTN position

21
Q

767: The EICAS advisory message FWD EQPT SMOKE displays and ________ if smoke is sensed in the forward equipment cooling exhaust duct.

a) The SMOKE light illuminates
b) The packs switch to high flow
c) The cooling system automatically reconfigures
d) The overboard exhaust valve opens

A

The SMOKE light illuminates

22
Q

767: The equipment cooling system VALVE light is illuminated. What is a possible cause for it’s illumination?

a) There is no cooling air in the equipment cooling system
b) Smoke has been detected in the forward equipment cooling ducts
c) There is an overheat in the forward equipment cooling system
d) One or more forward equipment cooling supply or exhaust valves are not in their
commanded position after engines are started

A

One or more forward equipment cooling supply or exhaust valves are not in their commanded position after engines are started

23
Q

767: The equipment cooling system OVHT light is illuminated. What caused it’s illumination?

a) There is low airflow or high temperature sensed
b) There is high air pressure sensed
c) There is high airflow sensed
d) Smoke has been detected

A

There is low airflow or high temperature sensed

24
Q

767: The equipment cooling system NO COOLING light is illuminated. What position must the EQUIP COOLING selector switch be in?

a) AUTO
b) OVRD
c) STBY
d) Any position

A

OVRD

25
Q

757/767: The R PACK has shut down due to compressor temperature exceedance. Both the pack INOP and PACK OFF lights are illuminated. Is that the correct indication?

A

Yes, the INOP and PACK OFF lights should be illuminated

26
Q

757/767: If you position one of the compartment temperature control knobs to the OFF position, what will happen?

a) The associated compartment INOP light will illuminate
b) The packs will produce maximum cooling
c) Trim air will be lost to all zones
d) The packs will revert to the STBY mode

A

The associated compartment INOP light will illuminate

27
Q

757/767: If the pack automatic control system were to fail, what would be indicated?

a) PACK OFF and INOP lights
b) A PACK OFF light only
c) The TRIM AIR light
d) The INOP light only

A

The INOP light only

28
Q

757/767: The high flow schedule is automatically activated to provide higher-than-normal air flow when:

a) The selector is positioned to high flow
b) Trim Air is removed
c) One pack is inoperative
d) External conditioned air is connected

A

One pack is inoperative

29
Q

757/767: On the ground, what would cause the high flow schedule to be automatically activated for both packs during single-engine taxi?

a) High ambient air temperature
b) Selecting STBY mode
c) APU supplying air to both packs
d) Closing APU bleed air valve

A

APU supplying air to both packs

30
Q

757: High flow to the opposite pack is inhibited when:

a) Ground air is connected
b) The RPM of either engine falls below a preset value
c) The associated recirculation fan is turned off
d) Associated engine bleed air switch is off

A

The RPM of either engine falls below a preset value

31
Q

757/767: What will the pack do when both the INOP and PACK OFF lights illuminate?

a) Shut down
b) Activate high flow schedule
c) Operate in a degraded mode
d) Open the pack valve

A

Shut down

SV (16 decks)

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