3: Using the system in figure below to draw the Fault tree and determine the failure characteristics of the top event (vessel overflows). In this problem, human intervention is introduced, and someone will turn off valve 7 when the alarm sounds. 7 Overflow 2 Chart LIA 3 6 LIC 5 The components of the level indicator alarm system are: 1. Chart recorder 2. Level indicator alarm 3. Level measurement 7. Input line Hand Valve The valve 4 closes when the level of feed in the reactor reaches a defined level. The components of the level control system are: 4. Valve 5. Level indicator controller 6. Level measurement The operator shuts off valve 7 when the level indicator alarm rings Worker closes valve 7 when level goes up