[2022年11月] 最新のASQ Certification CRE試験解答豪華セット問題集
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質問 245
In an elevated-temperature test on an electronic system, which of the following models is used to calculate the acceleration factor?
Response:
- A. Exponential model.
- B. Inverse power law model.
- C. Lognormal model.
- D. Arrhenius model.
正解: D
質問 246
A full factorial design of experiments has four factors. The first factor has two levels, the second factor has three levels, the third factor has two levels, and the final factor has four levels. How many runs are required for this analysis?
Response:
- A. 0
- B. 1
- C. 2
- D. 3
正解: C
質問 247
High cycle fatigue would MOST likely result in
Response:
- A. Wear out failure.
- B. Constant failure.
- C. Mid-life failure.
- D. Early failure.
正解: A
質問 248
Reliability prediction is:
Response:
- A. A one time estimation process.
- B. More important than reliability attained in the field.
- C. A continuous process starting with paper predictions.
- D. A popular method as simulation theory.
正解: C
質問 249
A system has components connected in active parallel. At least n - 1 of the components must operate for the system to function properly. Suppose the time to failure of each component has an exponential distribution with the same failure rate λ. The mean time to failure of this system is:
Response:
- A. 2/(n - 1) λ
- B. (n - 1)/n 2 λ
- C. 1/(n - 1) λ
- D. (2n - 1)/n(n - 1) λ.
正解: D
質問 250
An aggregate preventive maintenance program can greatly increase the overall availability of a system because of the Response:
- A. Ability to improve observed reliability.
- B. Improved control of inventory levels.
- C. Emphasis on budgeting operational expenses.
- D. Ability to improve product safety.
正解: A
質問 251
A QFD team's primary goal should be to
Response:
- A. Develop a matrix of the environmental test levels for reliability.
- B. Identify factors that influence customer satisfaction.
- C. Develop a matrix of critical component reliability tradeoffs.
- D. Document the quality frequency and defects field testing program.
正解: B
質問 252
An off road trip is contemplated using a utility vehicle equipped with five tires. The probability of failure for each tire on this trip follows the binomial distribution and is estimated to be 0.5.
What is the probability that the trip can be completed successfully with the five available tires?
Response:
- A. 0.3125
- B. 0.0625
- C. 0.1875
- D. 0.5000
正解: C
質問 253
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 error in the population due to part-to-part variation is too large.
- B. The test time to provide adequate reliability assurance under normal operating conditions is too long.
- C. The probability density function of the product follows either a log normal or a Weibull distribution.
- D. The current sample size and the life distribution show wear-out is likely
正解: B
質問 254
Product safety standards do NOT include:
Response:
- A. Product requirements laws passed by government
- B. Performance requirements for products.
- C. Evaluation requirements for product safety testing.
- D. Requirements for general, equipment and component safety.
正解: B
質問 255
Maintenance times on simple with straightforward repair will fit which of the following distributions?
Response:
- A. Lognormal.
- B. Normal.
- C. Geometric.
- D. Exponential.
正解: B
質問 256
Which of the following statements is TRUE about probability distributions?
Response:
- A. 4th moment about the mean is used to measure the skewness
- B. The median is used to measure the central tendency
- C. The 3rd moment about the mean is used to measure the kurtosis
- D. The variance is used to measure the central tendency
正解: B
質問 257
In general, one should select the highest component parameter ratings feasible so that:
I. Failure rates may be minimized.
II. Probability of secondary failure is minimized.
III. Safety margins are offered against unforeseen transients.
Response:
- A. I and III only
- B. I and II only
- C. I, II and III
- D. I only
正解: C
質問 258
The term "failure mode" is defined as the:
Response:
- A. Physical, chemical, electrical, or thermal process that results in failure.
- B. Consequence of the mechanism through which a failure occurs
- C. Event or inoperable state in which an item or part of an item does not perform as specifed
- D. Failure caused by the failure of an associated items.
正解: B
質問 259
Which of the following is best defined as the practice of using parallel components and subsystems?
Response:
- A. Optimization
- B. Maintainability
- C. Reliability
- D. Redundancy
正解: D
質問 260
Under a cost of reliability model, which of the following factors is used to determine warranty costs?
Response:
- A. Screening costs.
- B. Repair costs
- C. Environmental costs
- D. Product design costs.
正解: B
質問 261
The variations which the normal distribution curve describes are due to:
Response:
- A. Degradation failure.
- B. Non assignable causes.
- C. Catastrophic failure
- D. Assignable causes
正解: B
質問 262
The probability of an accident for the head event "H" given below is:
Response:
- A. 0.0689.
- B. 0.1100.
- C. 0.0700.
- D. 0.1125.
正解: A
質問 263
When a bathtub curve is used, one characteristic of the flat center portion of the curve is that during this period Response:
- A. The reliability of the system can be expressed as an exponential function
- B. The time of the next failure is predictable from the time of the last failure.
- C. There can be only one type of failure in the system.
- D. The equipment can be considered highly reliable.
正解: A
質問 264
A first step in the FMECA is to:
Response:
- A. Define the system requirements.
- B. Compile a critical items list.
- C. Identify failure modes.
- D. Establish ground rules to which the FMECA is performed.
正解: A
質問 265
A prototype lot of a new design suspension spring underwent testing with these results:
- Total hours accumulated: 12,000
- Number of Failures: 6
- Hours to failure: 202, 387, 461, 590, 723, 864
What is the failure rate?
Response:
- A. 0.0018/hour
- B. 0.0024/hour
- C. 0.0020/hour
- D. 0.0005/hour
正解: D
質問 266
The proper software tool for software development projects can help reduce test time. The software tools used to measure internal test coverage are called.
Response:
- A. Test verifiers.
- B. Test harnesses.
- C. Static analyzer.
- D. Assertion processors.
正解: A
質問 267
When reliability people say they are breaking the monopoly of the designer they mean Response:
- A. They intend to review the design in conjunction with other experts.
- B. They intend to put the reliability engineer organizationally higher than the design engineer.
- C. They insist on having final approved of the design.
- D. They are relieving the designer of his/her responsibility for the design.
正解: A
質問 268
For continual improvement in product reliability which of the following tests is MOST desirable?
Response:
- A. Burn-in tests
- B. Qualification tests.
- C. Development tests.
- D. Stress screening tests
正解: C
質問 269
Design plans are BEST developed for product reliability with significant input from which of the following?
Response:
- A. The project team.
- B. Quality management.
- C. General management.
- D. Reliability management.
正解: A
質問 270
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