PDF (New 2021) Actual ASQ CRE Exam Questions
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NEW QUESTION 76
For equipment consisting of three components connected in series whose respective reliabilities are
0.95, 0.94, 0.96, which could be used to calculate total probability?
Response:
- A. Addition law.
- B. Exponential failure law.
- C. Product rule.
- D. Bayes Theorem.
Answer: C
NEW QUESTION 77
Which of the following statements is TRUE about probability distributions?
Response:
- A. The variance is used to measure the central tendency
- B. The median is used to measure the central tendency
- C. The 3rd moment about the mean is used to measure the kurtosis
- D. 4th moment about the mean is used to measure the skewness
Answer: B
NEW QUESTION 78
Of the following, which is the MOST important reliability principle?
Response:
- A. Consider reliability early in the design phase.
- B. Use only proven designs.
- C. Specify only high reliability components.
- D. Use redundancy throughout the design.
Answer: A
NEW QUESTION 79
Which of the following activities is MOST effective in increasing reliability during a product's life cycle?
Response:
- A. Developing robust design.
- B. Developing capable processes.
- C. Improving gage repeatability and reproducibility
- D. Developing an aggressive testing strategy.
Answer: A
NEW QUESTION 80
Which of the following FTA statements is NOT true?
Response:
- A. It indicates the critical path from system failure to component failure.
- B. It illustrates the overall system behavior.
- C. It includes common mode failure effects.
- D. It provides corrective actions for component failures.
Answer: D
NEW QUESTION 81
A system is defined by the following reliability block diagram.
Which of the following block diagrams MOST simply represents the system reliability when Unit C is functioning?
Response:
- A. option C
- B. option B
- C. option A
- D. option D
Answer: A
NEW QUESTION 82
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 current sample size and the life distribution show wear-out is likely
- B. The probability density function of the product follows either a log normal or a Weibull distribution.
- C. The error in the population due to part-to-part variation is too large.
- D. The test time to provide adequate reliability assurance under normal operating conditions is too long.
Answer: D
NEW QUESTION 83
The main purpose of environmental stress screening is which of the following?
Response:
- A. To assist in the selection of standardized parts.
- B. To eliminate infant mortality failures.
- C. To eliminate supplier inspections.
- D. To subject parts to extremes
Answer: B
NEW QUESTION 84
Ideally for a FRACAS to be effective, how many failures should be allowed to pass before corrective action is to be undertaken?
Response:
- A. First occurrence of a failure mode.
- B. Fourth occurrence of a failure mode.
- C. Third occurrence of a failure mode.
- D. Second occurrence of a failure mode.
Answer: A
NEW QUESTION 85
Total system effectiveness can be predicted during the conceptual or development design by considering three main elements of reliability. Which of the four elements does NOT apply?
Response:
- A. Test reliability.
- B. Use reliability.
- C. Manufacturing reliability.
- D. Inherent reliability.
Answer: A
NEW QUESTION 86
According to Taguchi, robustly designed experiments should employ all of the following techniques EXCEPT Response:
- A. Signal-to-noise ratios.
- B. Linear graphs.
- C. Fold-over capabilities.
- D. Inner and outer arrays
Answer: C
NEW QUESTION 87
According to the Reliability Analysis Center, which of the following design objectives is NOT supported by reliability and maintainability contributing tasks?
Response:
- A. Determine the feasibility of consistent product manufacture.
- B. Design validation.
- C. Use of proper parts and correct application.
- D. Understand the impacts on design performance.
Answer: A
NEW QUESTION 88
The reliability parameter is one of the system performance parameters with significant influence on:
Response:
- A. Availability and dependability.
- B. Transfer functions.
- C. Hostile man-made environments
- D. Capability
Answer: A
NEW QUESTION 89
All of the following statements concerning statistical inference are true EXCEPT:
Response:
- A. Estimation is the process of analyzing a sample result in order to predict the value of the population parameter
- B. The confidence interval is normally the statistical tolerance limits of the population parameter.
- C. The point estimate is a single value used to estimate the population parameter.
- D. The confidence interval is a range of values which may include the true value of a population parameter.
Answer: B
NEW QUESTION 90
The reliability of a device comprised of various parts functioning in series is the:
Response:
- A. Product of the reliability.
- B. Sum of the probabilities of the unreliability.
- C. Sum of the reliability.
- D. Product of the unreliability
Answer: A
NEW QUESTION 91
In which of the following situation is it NOT advantageous to use Bayesian in reliability calculation?
Response:
- A. When each piece of new information will arrive in random error.
- B. When no prior information is available.
- C. When both objective and subjective information must be used
- D. When both continuous and discrete data will be used.
Answer: B
NEW QUESTION 92
What is meant by "derating"?
I. The technique of using a part, component, or equipment under stress conditions considerably below rated values, to achieve a "reliability margin" in design.
II. The technique of using a part, component, or equipment under normal conditions to achieve a reliable product design.
III. The technique of using a part, component, or equipment below stress conditions to achieve a reliable product design.
Response:
- A. I and III only
- B. I only
- C. III only
- D. I, II and III
Answer: B
NEW QUESTION 93
A design review committee has recommended changes to a proposed design. Whose job is it to investigate and incorporate the ideas that will aid product reliability?
Response:
- A. The reliability engineer.
- B. The senior decision maker.
- C. The design engineer.
- D. The design review chairman.
Answer: C
NEW QUESTION 94
Which of the following is best defined as the practice of using parallel components and subsystems?
Response:
- A. Maintainability
- B. Redundancy
- C. Reliability
- D. Optimization
Answer: B
NEW QUESTION 95
A substantial fraction of the usual design effort need NOT be devoted to a reliability program.:
Response:
- A. When time is limited.
- B. When the equipment is complex.
- C. When high reliability is specified.
- D. When high reliability is not specified.
Answer: D
NEW QUESTION 96
The hazard function is:
I. The probability of failure during a very small time interval, assuming a failure occurs before that time.
II. A function of constant failure rate only.
III. A function of increasing failure rate only.
IV. The ratio of the probability density function to the reliability function.
Response:
- A. II only
- B. IV only
- C. III only
- D. I only
Answer: B
NEW QUESTION 97
What is this system's reliability at 700 hours?
Component failure data is : - Failure rate of A = 0.0007 failures/hr - Reliability of B = 0.92 - MTTF of C =
1400 hours - Reliability of D = 0.85.
Response:
- A. 0.994
- B. 0.986
- C. 0.998
- D. 0.952
Answer: C
NEW QUESTION 98
Which of the following activities prioritizes failure modes based on probability of failure, severity, and consequences?
Response:
- A. FURPS.
- B. FRACAS.
- C. FMEA
- D. FTA
Answer: C
NEW QUESTION 99
What is meant by catastrophic failure?
I. A gradual change in the operating characteristics of an item resulting in no loss of useful performance.
II. A sudden change in the operating characteristics of an item resulting in complete loss of useful performance.
III. A gradual change in the operating characteristics of an item resulting in complete loss of performance.
Response:
- A. I
- B. II and III
- C. II
- D. All of the above.
Answer: C
NEW QUESTION 100
In an analysis of variance, which of the following distributions is the basis for determining whether the variance estimates are all from the same population?
Response:
- A. Normal
- B. Student's t
- C. Chi square.
- D. F
Answer: D
NEW QUESTION 101
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