737 Air Systems (600/700/800)
737-6/7/800 Study Guide
- 1.The blue RAM DOOR FULL OPEN Light illuminates whenever:
- A.
The airplane is in flight with the landing gear extended.
- B.
The airplane is on the ground.
- C.
Anytime the airplane is in flight.
- D.
When the Ram Door is fully open.
- E.
Both b and d are correct.
- 2.What fault indications can be reset with the TRIP RESET Switch?
- A.
BLEED TRIP OFF.
- B.
PACK
- C.
ZONE TEMP.
- D.
All of the above.
- 3.Two pressure relief valves provide safety pressure relief by limiting the differential pressure to a maximum of:
- A.
7.80 psi.
- B.
9.10 psi.
- C.
8.35 psi.
- D.
7.45 psi.
- 4.The motorized Overboard Exhaust valve:
- A.
Allows for increased ventilation in the smoke removal configuration.
- B.
Serves as backup to the outflow valve if the outflow valve fails.
- C.
Is normally open during pressurized flight above 8000 feet.
- D.
All the above.
- 5.The amber DUAL BLEED Light indicates a possible APU back pressure condition and thrust must be limited to IDLE.
- A.
True
- B.
False
- 6.Refer to the Cabin/Flight Altitude placard. At a cruise altitude of FL 290, the cabin altitude in the manual mode should read:
- A.
Approximately 8000 feet.
- B.
Slightly less than FL 220.
- C.
Approximately 6000 feet.
- D.
Cannot be determined by this placard.
- 7.The amber OFF SCHEDULE DESCENT Light illuminates. What does this indicate?
- A.
The pressure controller is unable to maintain pressurization.
- B.
The airplane has descended before reaching the preset cruise altitude set in the FLT ALT indicator.
- C.
The pressurization controller has failed and will automatically shift to ALT mode.
- D.
All of the above.
- 8.Following an unpressurized takeoff, when is the first engine Bleed Switch positioned to ON?
- A.
Prior to 400 feet above the ground.
- B.
After passing through 2000 feet above the ground
- C.
At not less than 400 feet, and prior to 2000 first above field elevation.
- D.
After the No. 1 engine bleed switch is positioned to ON.
- 9.What is the main source of conditioned air for the flight deck?
- A.
The Right Pack.
- B.
The Left Pack.
- C.
Both packs.
- D.
Ground Air Cart.
- 10.What systems rely on the pneumatic system for operation?
- A.
Air conditioning/Pressurization, Wing anti-ice, Fuel tanks
- B.
Wing Anti-ice, APU, engine starting.
- C.
APU, engine starting, Air conditioning/Pressurization.
- D.
Engine starting, Air conditioning/Pressurization, Wing and engine thermal anti-ice, Hydraulic reservoirs and water tank pressurization.
- 11.Illumination of the amber BLEED TRIP OFF Light indicates what valve has automatically closed?
- A.
Modulating and Shutoff valve.
- B.
Related Engine Bleed Air valve.
- C.
Isolation valve.
- D.
All of the above are correct.
- 12.What happens to engine fan air that is used to cool engine bleed air?
- A.
It is ducted into the pneumatic manifold.
- B.
It is ducted into the crossbleed manifold.
- C.
It is discharged overboard.
- D.
It is ducted into the 5th stage compressor.
- 13.When does the amber DUAL BLEED Illuminate?
- A.
When the APU bleed valve is open and the No.1 engine bleed valve is closed.
- B.
When the APU bleed valve is open and the No.1 engine bleed switch is ON.
- C.
When the APU bleed valve is open, the No. 2 engine bleed switch is on and the isolation valve is open.
- D.
Both b and c are correct.
- 14.What is the position of the isolation valve when the ISOLATION VALVE Switch is in AUTO?
- A.
The isolation valve is always open.
- B.
The isolation valve is always closed.
- C.
The isolation valve automatically modulates between open and closed, depending on pneumatic load.
- D.
Open when any Engine Bleed Air Switch or Air Conditioning Pack Switch is positioned OFF.
- 15.What happens when the WING-BODY OVHT TEST switch is pressed?
- A.
The amber WING-BODY OVHT lights illuminate.
- B.
The amber PACK TRIP OFF lights illuminate.
- C.
The amber BLEED TRIP OFF lights illuminate.
- D.
All of the above are correct.
- 16.How are the Engine Bleed Air valves powered?
- A.
They are AC activated and pneumatically operated.
- B.
They are DC activated and pneumatically operated
- C.
They are pressure activated and AC operated.
- D.
They are pressure activated and DC operated.
- 17.An illuminated BLEED TRIP OFF light indicates excessive engine bleed air pressure or temperature.
- A.
True
- B.
False
- 18.TRIM AIR is added to air from the mix manifold to:
- A.
Reduce pack demand.
- B.
Help maintain a constant cabin pressure.
- C.
Control zone temperature.
- D.
Control pack temperature.
- 19.Failure of the primary flight deck temperature control will cause an automatic switch to the back-up control.
- A.
True
- B.
False
- 20.A zone supply duct overheat will result in:
- A.
The closing of the associated Trim Air Modulating Valve.
- B.
The illumination of the associated amber ZONE TEMP Light.
- C.
Both the closing of the associated Trim Air Modulating Valve and the illumination of the associated ZONE TEMP Light.
- D.
The opening of the associated Trim Air Modulating Valve after the TRIP RESET Switch is pushed.
- 21.If any individual zone is switched OFF, the Temperature Selector setting will be ignored by the temperature control system.
- A.
True
- B.
False
- 22.If all pack control is lost, that pack will automatically shut down.
- A.
True
- B.
False
- 23.The Recirculation Fans:
- A.
Are driven by DC motors.
- B.
Increase airflow at greater cabin differential pressures.
- C.
Reduce air conditioning pack load.
- D.
Provide overheat detection downstream of the packs.
- 24.What causes an amber PACK Light to illuminate?
- A.
A pack trip off.
- B.
Failure of both primary and standby pack control for the same pack.
- C.
Turning OFF an engine bleed switch.
- D.
Both a and b are correct.
- 25.The bleed air duct pressure indicator:
- A.
Cannot indicate external air pressure
- B.
Indicates both temperature and pressure in the bleed air duct
- C.
Shows duct pressure in both the left and right bleed air ducts
- D.
Requires DC power for operation
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