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96 Cards in this Set
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These Cards are not verified accurate. Please, if you find a mistake, email: craigB737@icloud.com
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1. Where does APU bleed air enter the pneumatic manifold?
a. Left of the Isolation Valve b. Right of the Isolation Valve c. Both sides of the Isolation Valve |
a. Left of the Isolation Valve
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2. Where does the external pneumatic air enter the pneumatic manifold?
a. Left of the Isolation Valve b. Right of the Isolation Valve c. Both sides of the Isolation Valve |
b. Right of the Isolation Valve
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3. What are all the sources that provide air for the pneumatic system?
a. External air and engine bleeds b. APU, 5th, and 9th stage engine bleeds c. External, APU and 5th and 9th stage engine bleeds |
c. External, APU and 5th and 9th stage engine bleeds
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4. An 800 aircraft has three air conditioning control zones. The temperature controllers are in NORMAL and trim air is ON. The two packs will supply air at what temperature?
a. An average temperature for all three zones b. An average temperature for the FWD CAB and AFT CAB c. A temperature for the zone requiring the most cooling d. A temperature for the zone requiring the most warmth |
c. A temperature for the zone requiring the most cooling
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5. What happens when an engine bleed switch is placed to ON?
a. If engine bleed air and electrical power are available, the valve opens b. The valve will open if DC power but no air pressure is available to the valve c. An electric motor opens the engine bleed valve |
a. If engine bleed air and electrical power are available, the valve opens
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6. What does an illuminated engine BLEED TRIP OFF light indicate?
a. Excessive engine bleed air pressure caution, engine bleed valve remains open b. Excessive engine bleed air pressure or temperature advisory, engine bleed valve remains open c. Excessive engine bleed air pressure or temperature caution, engine bleed valve closes automatically |
c. Excessive engine bleed air pressure or temperature caution, engine bleed valve closes automatically
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7. How is engine bleed air temperature regulated?
a. Controlled ambient ram air circulates through ha precooler b. Controlled engine fan air circulates through a precooler c. Controlled engine fan air mixes with engine bleed air |
b. Controlled engine fan air circulates through a precooler
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8. Which model 737 has an amber light on the overhead panel labeled PACK TRIP OFF?
a. 300 model b. 800 model c. 900 model |
a. 300 model
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9. Air for starting the engines is supplied from ________.
a. Between the respective engine bleed air valve & 5th stage low pressure bleed valve b. Between the respective engine bleed air valve & 9th stage high pressure bleed valve c. The left or right pneumatic manifold |
c. The left or right pneumatic manifold
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10. Which statements are correct regarding the pneumatic manifold pressure sensors?
a. DC powered; located in left & right 9th stage engine bleed lines b. AC powered; located in left & right pneumatic manifolds c. AC powered; located in left, right & center pneumatic manifolds after pack valve |
b. AC powered; located in left & right pneumatic manifolds
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11. What do the duct pressure pointers indicate when one pack valve switch is placed to OFF with the APU providing bleed air and the isolation valve in AUTO?
a. Only the left pointer indicates APU bleed pressure b. Only the right indicates APU bleed pressure c. APU bleed pressure shows on both pointers |
c. APU bleed pressure shows on both pointers
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12. What occurs when the APU bleed air switch is placed to ON?
a. DC power signals valve to open, APU bleed air opens the valve if RPM is above 95% b. Normal AC bus power signals valve to open c. No. 1 AC Transfer bus power operates the motor, which opens the valve |
a. DC power signals valve to open, APU bleed air opens the valve if RPM is above 95%
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13. What is the power source for the pneumatic isolation valve?
a. Battery bus b. AC power c. DC Standby bus |
b. AC power
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14. Which statement best describes the isolation valve function?
a. Isolates left engine bleed air duct from the APU bleed air duct and is closed during normal operation b. Isolates right engine bleed air duct from the pneumatic ground air connection point and is open for engine start c. Isolates left & right sides of the pneumatic manifold and is closed during normal operation |
c. Isolates left & right sides of the pneumatic manifold and is closed during normal operation
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15. What action causes the pneumatic isolation valve to open when the switch is in the AUTO position?
a. Engine bleed air loss or APU bleed switch placed to OFF b. Placing an engine bleed air switch or pack switch to OFF c. Engine bleed valve or pack valve trip off |
b. Placing an engine bleed air switch or pack switch to OFF
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16. What is the function of the DUAL BLEED light?
a. To warn when two engine bleeds are supplying one pack b. To warn when 2 packs are operated from one bleed source c. To warn when the APU may be back pressured by engine bleed air |
c. To warn when the APU may be back pressured by engine bleed air
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17. Which valve and switch combination causes the DUAL BLEED light to come on?
a. APU bleed & isolation valves OPEN, with engine bleed switches in the OFF position b. Right & left engine bleed switches ON, with isolation valve OPEN and the APU bleed valve CLOSED c. APU bleed valve OPEN & right engine bleed switch On, with the isolation valve OPEN |
c. APU bleed valve OPEN & right engine bleed switch On, with the isolation valve OPEN
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18. What is the crew action for an illuminated DUAL BLEED light prior to engine start?
a. Place external air switch to OFF before engine start b. Place APU bleed air switch to OFF before engine start c. Place engine bleed air switch to OFF before engine start d. No action Dual Bleed Light is normal during engine start with APU bleed air |
d. No action Dual Bleed Light is normal during engine start with APU bleed air
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19. Which condition illuminates a WING-BODY OVERHEAT light?
a. Bleed air leak in the APU bleed air duct b. Bleed air leak in the wind leading edge are inboard of the engine strut c. Bleed air leak in the aircraft keel beam area d. All answers are correct |
a. Bleed air leak in the APU bleed air duct
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20. Which duct pressure indication is acceptable for a 6-737-300 engine start at the Denver airport? (5431 ft. above sea level)
a. 28 psi b. 25 psi c. 23 psi |
a. 28 psi
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21. What engine stages provide bleed air?
a. The 5th and 9th stage b. The 5th and 8th stage c. The 6th and 8th stage d. The 6th and 9th stage |
a. The 5th and 9th stage
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22. The 9th stage engine bleed air is the primary source of bleed air for pneumatics when the engine is at cruise thrust.
a. True b. False |
b. False
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23. The engine bleed valves are located:
a. Upstream of the 8th stage modulations/shutoff valve b. Upstream of the 9th stage modulations/shutoff valve c. Downstream of the 9th stage modulations/shutoff valve |
c. Downstream of the 9th stage modulations/shutoff valve
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24. How are the bleed valves operated?
a. They are electrically controlled and operated b. They are electrically controlled and pneumatically operated c. They are pneumatically controlled and operated d. They are pneumatically controlled and electrically operated |
b. They are electrically controlled and pneumatically operated
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25. Excessive engine bleed air pressure or temperature will cause what condition to occur?
a. A bleed trip b. A bleed overheat c. A bleed overstress |
a. A bleed trip
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26. If the APU bleed valve and switch are open, the valve will automatically close with APU shutdown.
a. True b. False |
a. True
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27. A right WING-BODY OVERHEAT light could indicate a bleed air leak in all of the following, except:
a. In the right air condition pack bay b. In the right leading edge area c. In the keel beam area d. In the right engine pylon |
c. In the keel beam area
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28. What B-737-500 minimum duct pressure is required to operate two air conditioning packs from one bleed source?
a. 15-20 PSI b. 20-25 PSI c. 25-30 PSI d. 30-45 PSI |
b. 20-25 PSI
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29. The potable water system pressurization line connects to which part of the pneumatic manifold?
a. The left side b. The right side c. Both sides d. The water system does not connect to the pneumatic manifold |
a. The left side
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30. The Engine Bleed Valve Trip pressure sensor is located ________.
a. Before bleed air reaches the engine bleed valve b. After the engine bleed air passes the engine bleed valve |
a. Before bleed air reaches the engine bleed valve
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31. The Engine Bleed Valve Trip temperature sensor is located
a. Before bleed air reaches the engine bleed valve b. After the engine bleed air passes the engine bleed valve and pre-cooler |
b. After the engine bleed air passes the engine bleed valve and pre-cooler
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32. What limitation is imposed when the DUAL BLEED light is illuminated?
a. The APU must be shut down. b. No more than idle engine power is allowed c. The engine on the side that caused the DUAL BLEED light to illuminate must be shut down. d. The crew must close both engine bleed valves. |
b. No more than idle engine power is allowed
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33. External pneumatic air can be used to start the number 1 engine _______.
a. Only if the number 1 engine bleed valve is open b. Only if the number 1 engine bleed valve is closed c. Only if the APU bleed valve is open d. If the isolation valve is open |
d. If the isolation valve is open
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34. The APU provides bleed air directly to
a. The left side of the pneumatic manifold b. The right side of the pneumatic manifold |
a. The left side of the pneumatic manifold
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35. The engine bleed valve must be open for ENGINE anti-ice to be available.
a. True b. False |
b. False
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36. What is the normal source of conditioned air for the flight deck with both packs operating? (300/500)
a. The left pack prior to the mix manifold b. From the left side wall riser c. From the mix manifold and from either pack |
a. The left pack prior to the mix manifold
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37. What is the indication on the respective AIR MIX VALVE position indicator when a pack valve closes? (300/500/700)
a. Full COLD b. Mid position c. Full HOT |
a. Full COLD
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38. Which correct for pack operation?
a. Bleed air flows through two separate heat exchangers, then through the ACM compressor & turbine b. Bleed air flows through a heat exchanger, the ACM compressor, a second heat exchanger, then the ACM turbine c. Bleed air flows through the ACM (Air Cycle Machine) compressor & turbine, then through two parallel heat exchanges. |
b. Bleed air flows through a heat exchanger, the ACM compressor, a second heat exchanger, then the ACM turbine
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39. What does an illuminated PACK TRIP OFF light indicate? (8-737-300)
a. Pack valve closed by ACM failure and mix valves remain full HOT b. Pack valve closed by compressor discharge or turbine inlet overtemp or duct over temp c. Pack valve closed by duct overheat or pack switch selected off |
b. Pack valve closed by compressor discharge or turbine inlet overtemp or duct over temp
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40. When are the RAM DOOR FULL OPEN lights extinguished?
a. With high pack temperature b. In cruise with low pack temperature c. On the ground d. When flaps are extended |
b. In cruise with low pack temperature
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41. On the ground, what is the proper indication of the ram door position lights?
a. RAM DOOR FULL OPEN lights illuminated b. RAM DOOR FULL OPEN lights extinguished c. RAM DOOR FULL CLOSED lights illuminated |
a. RAM DOOR FULL OPEN lights illuminated
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42. What is the function of the turbofan in the ram air exit duct? (8-737-500)
a. Augments ram airflow any time an Air Cycle Machine is operating b. Augments ram airflow in flight with pack shut down c. Augments ram airflow when a pack is operating on the ground or inflight with the flaps not up |
c. Augments ram airflow when a pack is operating on the ground or inflight with the flaps not up
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43. Which statement is correct regarding the air conditioning system deflector doors?
a. The doors extend on the ground to prevent FOD ingestion b. The doors retract on the ground to augment ACM cooling c. The doors extend on the ground to augment ACM cooling |
a. The doors extend on the ground to prevent FOD ingestion
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44. What is the purpose of the recirculation fan?
a. Increase pack cooling b. Reduced pack loads & engine bleed demand c. Increase pack cooling & engine bleed demand |
b. Reduced pack loads & engine bleed demand
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45. Where is filtered RECIRC FAN air discharged?
a. Into the mix manifold b. Overboard through the flow control valve c. Into the forward cargo compartment |
a. Into the mix manifold
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46. What occurs when a pack switch is placed to the HIGH position with other pack switch in AUTO and the RECIRC FAN switch in AUTO? (737-300)
a. Respective pack & recirc fan go to high flow mode b. Respective pack goes to high flow & recirc fan shuts down c. Respective pack goes to high flow & recirc fan starts |
b. Respective pack goes to high flow & recirc fan shuts down
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47. Which statement is correct regarding single pack operation with one pack switch in AUTO and one pack switch OFF inflight?
a. Remaining pack goes to high flow in flight when flaps are up b. Remaining pack goes to high flow with flaps up or down c. Remaining pack automatically switches to the Standby pressurization controller |
a. Remaining pack goes to high flow in flight when flaps are up
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48. With RECIRC FAN switch at AUTO, and both pack switches at AUTO, which statement is correct regarding the recirculation fan operation? (737-500)
a. Recirc fan starts when wither pack switch is placed to HIGH b. Recirc fan continues to operate when either pack switch is placed to HIGH c. Recirc fan shuts down when either pack switch is placed to HIGH |
c. Recirc fan shuts down when either pack switch is placed to HIGH
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49. What does an illuminated DUCT OVERHEAT light indicate? (737-500)
a. Duct has overheated and mix valves have driven full HOT b. Duct has overheated and mix valve have driven full COLD c. Duct has ruptured and mix valves has driven full COLD |
b. Duct has overheated and mix valve have driven full COLD
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50. How is hot air removed from the circuit breaker panels and the E & E compartment equipment?
a. By either the main or alternate equipment cooling fans b. Dumped overboard through the flow control valve which is always open when the recirc fan is operating c. By opening of the forward outflow valve which is always open when the recirc fan is operating |
a. By either the main or alternate equipment cooling fans
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51. Which statements is correct regarding operation of the flow control valve? (737-500)
a. Opens when cabin pressure differential reaches .25 psid b. Closes when cabin pressure differential reaches 2.5 psid c. Opens when indicated air speed reaches 250 knots |
b. Closes when cabin pressure differential reaches 2.5 psid
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52. What does an illuminated EQUIP COOLING OFF light indicate?
a. NO airflow from the respective equipment cooling fan b. Flow control valve closure has caused an overheat c. Recirc fan shutdown has caused an overheat condition |
a. NO airflow from the respective equipment cooling fan
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53. How is the forward cargo compartment heated when cabin differential pressure is above 2.6 psi with the forward outflow valve closed? (737-500)
a. The equipment cooling fan maintains airflow around the inside of compartment b. The recirc fan maintains airflow around the outside of the compartment c. The recirc fan maintains airflow through the inside of the compartment |
b. The recirc fan maintains airflow around the outside of the compartment
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54. Which systems are reset by means of the TRIP RESET switch? (737-500)
a. DUCT OVERHEAT, PACK TRIP OFF, WING-BODY OVERHEAT 1 b. DUCT OVERHEAT, PACK TRIP OFF & BLEED TRIP OFF c. DUAL BLEED, DUCT OVERHEAT, & PACK TRIP OFF |
b. DUCT OVERHEAT, PACK TRIP OFF & BLEED TRIP OFF
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55. How are the pack & isolation valve switches positioned for a BLEEDS-OFF takeoff?
a. Pack switches HIGH, isolation valve switch CLOSE b. Pack switches OFF, isolation valve switch AUTO c. Pack switches AUTO, isolation valve switch CLOSE |
c. Pack switches AUTO, isolation valve switch CLOSE
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56. During a bleed ON takeoff, the air conditioning pack switches and the isolation valve switch are positioned:
a. The right pack in AUTO the isolation valve switch in AUTO, and the left pack in AUTO b. HIGH for both packs, with the isolation valves in AUTO c. AUTO for the left pack, HIGH for the right pack, off for the isolation valve d. OFF selected for the left pack switch with the isolation valve switched to AUTO, and the right pack switch placed to the high position |
a. The right pack in AUTO the isolation valve switch in AUTO, and the left pack in AUTO
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57. Inflight, when both air conditioning packs are operating and the RECIRC FAN is in AUTO, placing a pack switch to HIGH: (737-500)
a. Turns the RECIRC FAN off b. Causes the pack to operate at a higher than normal rate of air flow c. Causes the forward outflow valve to open d. All answers are correct |
d. All answers are correct
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58. With both packs operating, if air conditioning smoke appears in the cockpit and in the cabin, the most likely source is: (737-500)
a. Left air conditioning pack b. Right air conditioning pack |
a. Left air conditioning pack
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59. With RECIRC fan switch in AUTO, the fan _________. (737-500)
a. Operates all the time regardless of pack switch position b. Operates if one pack is turned OFF and the other is in AUTO c. Operates if one pack is in AUTO and the other is in HIGH |
b. Operates if one pack is turned OFF and the other is in AUTO
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60. E & E compartment cooling airflow is normally provided by the:
a. Main flow outflow valve b. Differential pressure induced air flow c. Equipment cooling fan d. Recirculating fan |
c. Equipment cooling fan
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61. Overheat temperature sensors that will cause a pack trip are located in the: (737-500)
a. ACM compressor discharge duct, turbine inlet duct, and supply duct b. ACM compressor discharge duct, supply duct, and passenger cabin overhead at row 5 c. ACM compressor discharge duct, turbine inlet duct, and heat exchanger cooling ram air duct |
a. ACM compressor discharge duct, turbine inlet duct, and supply duct
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62. When parked at the gate, external conditioned air temperature controlled by the packs.
a. IS not b. Should be c. Is d. Can be |
a. IS not
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63. Bleed air for the pack is as it passes through the primary heat exchanger.
a. Mixed b. Compressed c. Cooled d. Heated |
c. Cooled
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64. Each pack has a temperature selector. The selector on the left controls the temperature for. (737-300/500)
a. Flight deck b. Passenger cabin c. Jetway d. Cargo hold |
a. Flight deck
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65. With the pack switch turned OFF, the pack valve closes and the mix valves. (737-300/500)
a. Do not move b. Move to full hot c. Move to full cold |
c. Move to full cold
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66. With aircraft airborne, when is the forward outflow valve closed? (737-300/500)
a. When the aft outflow valve is half open b. When the aft outflow valve is fully open c. When the recirculation fan is operating |
c. When the recirculation fan is operating
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67. Which cabin pressure control modes utilize the outflow valve DC motor? (non-digital controller)
a. STBY & MAN b. AUTO & MAN c. AUTO & STBY |
a. STBY & MAN
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68. When should the equipment cooling flow control valve close? (737-300/500)
a. At 2.50 psid b. At 7.45 psid c. At 8.65 psid |
a. At 2.50 psid
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69. Which model 737 has a TRIM AIR switch on the overhead panel
a. 300 model b. 500 model c. 700 model d. 800 model |
d. 800 model
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70. Which of the following 737 models has a Forward Outflow Valve?
a. 500 model b. 700 model c. 800 model d. 900 model |
a. 500 model
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71. What occurs when the FLT GRD switch is placed to FLT with aircraft o the ground, packs ON, doors CLOSED, and engine bleed air available? (737-300/500)
a. The main outflow valve opens to depressurize the aircraft when on the ground b. The main outflow valve modulates as necessary to maintain the aircraft at 200 feet below departure field elevation c. The main outflow valve closes to pressurize the aircraft to 200 feet below destination field elevation |
b. The main outflow valve modulates as necessary to maintain the aircraft at 200 feet below departure field elevation
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72. If the aircraft climbs above the altitude set in the pressurization controller FLT ALT window, the cabin pressure will remain constant until which psid? (737-300/500)
a. 7.45 psid b. 7.80 psid c. 7.90 psid |
c. 7.90 psid
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73. The B-737-700 has pressure relief valves that limit the cabin differential pressure to what value?
a. 9.1 psid differential b. 8.5 psid differential c. 8.0 psid differential d. 7.48 psid differential |
a. 9.1 psid differential
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74. What altitude is set in the STANDBY CAB ALT indicator when operating in AUTO during the receiving aircraft check?
a. Proposed cruise altitude + 1000 feet b. 200 feet below landing field elevation c. 300 feet below landing field elevation |
b. 200 feet below landing field elevation
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75. What altitude is set in the STANDBY CAB ALT indicator during the receiving aircraft check when operating the flight with the STANDBY pressurization system? (Auto system inop)
a. Takeoff field elevation minus 200 feet b. Landing field elevation minus 200 feet c. Landing field elevation minus 300 feet |
b. Landing field elevation minus 200 feet
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76. What procedure is preferred for MANUAL control of pressurization? (737-300/500)
a. Use the MANUAL – CLOSE / OPEN switch & MAN AC for slower operations of the outflow valve b. Use the MANUAL – CLOSE / OPEN switch & MAN DC for faster operation of the outflow valve c. Use the MANUAL – CLOSE / OPEN switch & MAN DC for slower operation of the outflow valve |
c. Use the MANUAL – CLOSE / OPEN switch & MAN DC for slower operation of the outflow valve
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77. What does an illuminated OFF SCHED DESCENT light indicate?
a. Aircraft descending without having reached the selected cruise altitude b. Power loss to the pressurization system c. Automatic pressure controller failure |
a. Aircraft descending without having reached the selected cruise altitude
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78. What does an illuminated AUTO FAIL light and STANDBY light on the pressurization panel indicate? (737-300/500)
a. Auto control has failed and automatically switched to MANUAL mode b. Auto control has failed and automatically switched to STANDBY mode c. Auto control has failed, crew must switch to STANDBY mode |
b. Auto control has failed and automatically switched to STANDBY mode
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79. Which condition illuminates the pressurization AUTO FAIL light? (737-300/500)
a. Selected cruise altitude not reached, aircraft descending b. Cabin rate of change has exceeded + or – 1800 fpm c. FLT GRD switch was left in the GRD position for takeoff |
b. Cabin rate of change has exceeded + or – 1800 fpm
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80. Which lights should come on when AC electrical power is lost to the AUTO pressure control system? (non-digital system) (737-300/500)
a. AUTO FAIL & MANUAL b. AUTO FAIL & STANDBY c. AUTO FAIL & OFF SCHED DESCENT |
b. AUTO FAIL & STANDBY
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81. Which statement is correct regarding the outflow valve position indicator?
a. Operates only during STANDBY & MANUAL operation b. Operates only during MANUAL operation c. Operates in all pressurization modes with AC power available |
c. Operates in all pressurization modes with AC power available
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82. What is the purpose of the pressurization flight/ground switch GND position? (737-300/500)
a. Drives main outflow valve full closed on the ground b. Drives main outflow valve full open on the ground c. Modulates the main outflow valve during ground operation |
b. Drives main outflow valve full open on the ground
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83. What occurs if the FLT I GRD switch is not selected to FLT for takeoff? (737-300/500)
a. The AUTO FAIL & STANDBY lights come on b. The aircraft will pressurize after takeoff c. Aircraft does not pressurize until FLT is selected |
b. The aircraft will pressurize after takeoff
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84. All of the following items control the ram air system ram door and exhaust louvers except:
a. The compressor discharge duct temperature sensor b. The flaps c. The air-ground safety sensor d. The pressurization controller |
d. The pressurization controller
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85. What is the maximum differential pressure allowed by the System Safety Pressure Relief Valves? (737-300/500)
a. A differential pressure of 7.45 b. A differential pressure of 7.90 c. A differential pressure of 8.25 d. A differential pressure of 8.65 |
d. A differential pressure of 8.65
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86. If the aircraft pressurization system is operating in AUTO on the ground, moving the FLT/GRD switch from GRD to FLT will cause the aircraft to: (737-300/500)
a. Remain depressurized b. Pressurize to approximately 200 ft. below field elevation c. Pressurize to the selected cabin altitude |
b. Pressurize to approximately 200 ft. below field elevation
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87. The forward outflow valve is closed when: (737-300/500)
a. The main outflow valve is open b. The RECIRC FAN is operating c. More than 2.5 psi differential pressure exists d. The flight/ground switch is in FLT |
b. The RECIRC FAN is operating
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88. When is the RAM DOOR FULL OPEN light illuminated?
a. On the ground only b. On the ground, or in flight with the flaps extended c. Only in flight d. Only in flight with the flaps extended |
b. On the ground, or in flight with the flaps extended
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89. Illumination of the amber pressurization OFF SCHED DESCENT light indicates what situation?
a. The airplane is descending prior to reaching the selected flight altitude b. The pressurization controller has failed and switches automatically to c. The pressurization controller is unable maintain pressurization d. All answers are correct |
a. The airplane is descending prior to reaching the selected flight altitude
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90. What is the maximum allowable differential pressure for takeoff?
a. 200 feet below airport elevation b. 300 feet below airport elevation c. .125 PSID d. 1.0 PSID |
c. .125 PSID
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91. The air conditioning packs may be operated in HIGH during a bleed on takeoff.
a. True b. False |
b. False
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92. With the aircraft the maximum certified altitude and one pack operating, what is the lowest cabin altitude can that be maintained?
a. 8000 feet b. 9000 feet c. 10,000 feet d. 13,875 feet |
a. 8000 feet
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93. Which of the following rely on pneumatics for operations?
a. Water tank pressurization b. Waste Water pressurization c. Coffee Potpressurization d. FO's Ass pressurization |
a. Water tank pressurization
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94. Which of the following 737 models has a forward outflow valve?
a. B737-500 b. B737-Space Shuttle Edition c. B737-NG d. B737-599 |
a. B737-500
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95. Which B737 model has a trim air switch on the overhead panel?
a. B737-Space Shuttle Edition b. B737-800 c. B737-NG d. B737-599 |
b B737-800
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