Air Systems (FM: 6.20) Flashcards
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 position disagrees with the commanded position
d) The isolation valve has sensed an overpressure
C) The isolation valve position disagrees with the commanded position
757: The right DUCT LEAK light is illuminated. What does this indicate?
a) High bleed overpressure in the pneumatic duct is detected
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
B) A high temperature bleed air leak is detected
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 determine by the graphic
A) Closed
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
D) The right engine bleed air temperature is excessive
757: The APU BLEED AIR VALVE light is illuminated. What is the position of the APU bleed air valve?
a) Selected closed, but open
b) Selected closed, and fully closed
c) Selected open, and fully open
d) Selected open, but not open
D) Selected open, but not open
767: The right engine bleed air overheat (OVHT) light is illuminated. What does this indicate?
a) The engine bleed air temperature is excessive
b) An overpressure condition has been detected
c) A high temperature bleed air leak is detected
d) The HPSOV & PRV, when commanded, failed to open
A) The engine bleed air temperature is excessive
757/767: The engine bleed air valves (pressure regulating and shut off valve [PRSOV]) are __________________.
a) Electrically controlled and pneumatically actuated
b) Pneumatically controlled and pneumatically actuated
c) Pneumatically controlled and electrically actuated
d) Electrically controlled and electrically actuated
A) Electrically controlled and pneumatically actuated
757: The left HI STAGE light is illuminated. What does this indicate?
a) The left engine HI STAGE valve position is now based on throttle position
b) The left engine HI STAGE valve is locked at the mid position
c) The left engine HI STAGE valve has been locked open
d) The left engine HI STAGE valve has been locked closed
D) The left engine HI STAGE valve has been locked closed
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
D) Control is automatically switched to the AUTO 1 controller
757/767: According to the previous question’s graphic, if a return to DEN is made, what is required by the crew?
a) Select the opposite AUTO position used for takeoff
b) The controller must be reset to DEN altitude
c) Set the AUTO RATE knob to the index position for landing
d) Select MAN on the controller and use manual operation for landing
B) The controller must be reset to DEN altitude
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
C) When the throttles are advanced for the takeoff
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
D) Both AUTO controllers have failed
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) 1000, 300
b) 800, 300
c) 600, 400
d) 500, 300
D) 500, 300
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
b) Cabin altitude automatically descends to 4000 feet
c) Control is automatically switched to the MAN controller
d) The AUTO INOP light illuminates
A) Control is automatically switched to the other controller
757/767: If a return to the departure airport is necessary, how must the crew set the pressurization system?
a) Select MAN on the controller and use manual operation for landing
b) Select the opposite AUTO position used for takeoff
c) Set the AUTO RATE knob to the index position for landing
d) Reset the landing altitude for the return to the departure airport
D) Reset the landing altitude for the return to the departure airport
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
C) MODE SELECT switch is in MAN
753/767: The aircraft is divided into ___ temperature zones.
a) 4
b) 2
c) 3
d) 5
A) 4
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
757/767: The FWD CAB compartment temperature INOP light is illuminated. What could have caused it to illuminate?
a) The controller has developed a fault
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 controller has developed a fault
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
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
C) Pressing the EQUIP COOLING switch to the ALTN position
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) Packs switch to high flow
c) The cooling system automatically reconfigures
d) Overboard exhaust valve opens
A) The smoke light illuminates
767: The equipment cooling system VALVE light is illuminated. What caused this light to
illuminate?
a) The forward equipment supply fan has failed
b) The forward equipment exhaust fan has failed
c) There is an overpressure condition sensed in the cooling system
d) The system valves failed to reconfigure during automatic operation
D) The system valves failed to reconfigure during automatic operation
767: The equipment cooling system OVHT light is illuminated. What caused this light to illuminate?
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
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 will illuminate the light
B) OVRD
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) No, only the PACK OFF light should be illuminated
b) Yes, but the TRIM AIR OFF light should also be illuminated
c) No, only the pack INOP light should be illuminated
d) Yes, the INOP and PACK OFF lights should be illuminated
D) Yes, the INOP and PACK OFF lights should be illuminated
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
757/767: If the pack automatic control system were to fail, what would be indicated?
a) PACK OFF and INOP
b) A PACK OFF light only
c) The TRIM AIR light
d) The INOP light only
D) The INOP light only
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
C) One pack is inoperative
757/767: On the ground, what would cause the high flow schedule to be automatically activated during single-engine taxi?
a) Turning one pack off
b) Selecting STBY mode
c) APU supplying air to both packs
d) Turn off the associated recirc fan
C) APU supplying air to both packs
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 recirc. fan is turned off
d) Associated ENG BLD switch off
B) The RPM of either engine falls below a preset value
757/767: What will the pack do when both the PACK INOP and PACK OFF lights have illuminated?
a) Shutdown automatically
b) Activate high flow schedule
c) Operate in a degraded mode
d) Allow the pack valve to open
A) Shutdown automatically
