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ASQ Certified Reliability Engineer (CRE) Sample Questions:

1. The influence of FMEA on reliability is maximized at which of the following stages of development?
Response:

A) Operation.
B) Test.
C) Design.
D) Prototype.

2. Which of the following is the main advantage of a step stress test?
Response:

A) It segregate discrepant hardware
B) It yields failure quickly
C) It guarantees accurate estimates
D) It runs at constant stress

3. Which answer mathematically expresses the reliability of an active parallel system in which all component reliabilities are unequal?

Response:

A) Rs = Ra + Rb + Rc - RaRbRc
B) Rs = [RaRbRc] / [Ra + Rb + Rc]
C) Rs = [RaRbRc + RaRb + RbRc + RaRc ] / [Ra + Rb + Rc]
D) Rs = RaRbRc - (RaRb + RbRc + RaRc) + (Ra + Rb + Rc)

4. The equation below represents

Response:

A) The process capability adjusted for centering.
B) The probability of meeting specification.
C) The limits for a Range chart.
D) The limits for an X Bar control chart.

5. A device has a MTBF of 400 hours. Assuming an exponential distribution of time to failure, what is the maximum time of allowable operation if a reliability of .995 is required?
Response:

A) 20 hours
B) 0.2 hours
C) 2 hours
D) 0.02 hours

Solutions: