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ASQ Certified Reliability Engineer (CRE) Sample Questions:

1. Which of the following is the MOST appropriate reason for selecting accelerated life testing for an expensive product to determine adherence to design requirements?
Response:

A) The test time to provide adequate reliability assurance under normal operating conditions is too long.
B) The error in the population due to part-to-part variation is too large.
C) The current sample size and the life distribution show wear-out is likely
D) The probability density function of the product follows either a log normal or a Weibull distribution.

2. In which of the following situation is it NOT advantageous to use Bayesian in reliability calculation?
Response:

A) When both continuous and discrete data will be used.
B) When each piece of new information will arrive in random error.
C) When both objective and subjective information must be used
D) When no prior information is available.

3. Preliminary hazard analysis:
I. Is a review of safety problems prior to production.
II. Is normally done at a time when there is little design detail.
III. Can be used to identify the principal hazards when the product is first conceived.
Response:

A) III only
B) I only
C) I and II only
D) I, II and III

4. When performing trade-offs in evaluating parts for reliability, which of the following is LEAST important?
Response:

A) Technical comparison of new part with standard part type.
B) Initial parts costs.
C) Process and materials compatibility.
D) Search of data part history to established reliability potential.

5. The predicted reliability is higher than the long term realized probability. Which of the following is the MOST likely cause of this difference?
Response:

A) Lack of adequate employee training and process audits.
B) The accumulation of random process variations.
C) Deterioration of the manufacturing processes and procedures.
D) A poor initial estimation of reliability.

Solutions: