Reliability multiple choice questions

 Reliability

1. In parallel configuration of five components, the entire system will fail if _____
a) any two components fail
b) any three components fail
c) all the components fail
d) any one components fail
Answer: all the components fail
2. System reliability for components kept in series _______ as the number of components increases.
a) Increases
b) Decreases
c) Remains unchanged
d) Cannot be determined
Answer: Decreases
3. Reliability is the probability of a system or service to perform its intended function satisfactorily over a specific period of time under specific conditions.
a) True
b) False
Answer: True
4. Reliability is a measure of how quality changes over time.
a) True
b) False
Answer: True
5. What does the graph of ‘bathtub curve’ represent?
a) Failure rate v/s Mean
b) Failure rate v/s Time
c) Failure rate v/s Distance
d) Failure rate v/s Velocity
Answer: Failure rate v/s Time
6. The life-test sample plans that are terminated when a pre-assigned number of failures occur in the sample is _____
a) Failure-terminated
b) Time-terminated
c) Operation-terminated
d) Sequential
Answer: Failure-terminated
7. The reliability of the entire system is called ______
a) Partial reliability
b) Isolated reliability
c) Closed reliability
d) System reliability
Answer: System reliability
8. In series configuration of five components, the entire system will fail if ______
a) any two components fail
b) any three components fail
c) any one of the components fail
d) any four components fail
Answer: any one of the components fail
9. System reliability for components kept in parallel ______ as the number of components increases.
a) Increases
b) Decreases
c) Remains unchanged
d) Cannot be determined
Answer: Increases