Redundancy and Failure Survival in FBW MCQ

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• Which of the following is not a common mode failure?
  ক

  Lightning strike

  খ

  Fire/explosion/battle damage

  গ

  Bird strike

  ঘ

  Incorrect maintenance
• What are C 1, C 2, C 3, C 4 in the following diagram of the quadruplex system?
  ক

  Computer

  খ

  Power control unit

  গ

  Monitor

  ঘ

  Blank box
• How is failure detected in a quadruplex system?
  ক

  Cross comparing signals and voting

  খ

  Monitoring signals

  গ

  Adding signals

  ঘ

  Subtracting signals
• What type of system does the figure represent?
  ক

  Monitored system

  খ

  Duplex system

  গ

  Monitored duplex system

  ঘ

  Monitored diplex system
• Complete the signal flow diagram for a monitored system
  ক

  Lane

  খ

  Flight control computer

  গ

  Monitor

  ঘ

  Error compensator
• Which of the following uses a monitoring system to check the function of channels?
  ক

  Matching triplex

  খ

  Monitored triplex

  গ

  Master triplex

  ঘ

  Major triplex
• In a quadruplex system, when does a passive fail situation occur?
  ক

  When all the channels fail

  খ

  When 3 channels fail and none is disconnected

  গ

  When 2 channels fail none is disconnected

  ঘ

  When 1 channel fail none is disconnected
• What is called a quadruplex system?
  ক

  System with 4 channels

  খ

  System with 8 channels

  গ

  System which does not fail

  ঘ

  System with 4 times the speed
• What is MTBF?
  ক

  Mean Time Before Fracture

  খ

  Minimum Time Between Failures

  গ

  Maximum Time Between Failures

  ঘ

  Mean Time Between Failures
• What is the failure probability figure of a commercial aircraft?
  ক

  1×10-4/hr

  খ

  1×10-6/hr

  গ

  1×10-11/hr

  ঘ

  1×10-20/hr