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CSP Practice Test 6

10 free CSP practice questions in the real exam format, covering the official content areas, with an explanation for every answer.

CSP Practice Test 6Tutor mode

Question 1 of 10

Program Management

A system safety engineer builds the fault tree shown for rupture of a batch reactor. The basic events are independent, and their probabilities are per year. Use the exact gate expressions (not the rare-event approximation):

AND gate: OR gate:

What is the annual probability of the top event?

Fault tree: reactor vessel rupture
Reactor vessel rupturesANDOverpressure developsORRelief system failsORE1Cooling water lostP = 0.10E2Feed valve fails openP = 0.20E3Relief valve stuck shutP = 0.05E4Relief line isolatedP = 0.02
The top event requires both intermediate events (AND gate). Each intermediate event occurs if either of its basic events occurs (OR gate). Basic-event probabilities are per year. Figure not drawn to scale.