CRE認証試験の問題集解答を提供しています [2022年01月]
更新されたCRE試験練習テスト問題
質問 101
Which of the following action will help eliminate the effects of extraneous factors in a designed experiment?
Response:
- A. Selecting factor levels.
- B. Repeating the experiment under different conditions.
- C. Fractionating the experiment.
- D. Randomizing the experiment.
正解: D
質問 102
Your customer required a paper cutting machine with these specifications:
Speed : 100m/minute; Cutting width : 47 inches; Good product : 99%
You deliver a machine to this customer with these specifications :
Speed : 110m/minute; Cutting width : 48 inches; Good product: 97%.
How would you classify this success/failure ?
Response:
- A. A technical failure.
- B. A limited success
- C. A technical success, but quality failure.
- D. None of the above.
正解: A
質問 103
The general public is willing to accept some risks in their work environment. A study has indicated that an accident fatality at which of the following levels is NOT of great concern to the average person?
Response:
- A. 1 per 100,000 per persons per year.
- B. 1 per 1000 per persons per year.
- C. 1 per 10,000 per persons per year.
- D. 1 per 100 per persons per year.
正解: A
質問 104
Derating enhance reliability in all of the following ways EXCEPT by
Response:
- A. Establishing a robustness design margin
- B. Increasing the long-term drift in parameter values.
- C. Restricting stress on components to levels below their rated limits
- D. Reducing the impact of parameter variations.
正解: A
質問 105
The prediction technique has obviously not always been effective quantitatively. There is often a wide difference between actual reliability and predicted reliability. Nevertheless, the reliability prediction technique permits:
Response:
- A. Indicating which department is to blame.
- B. Separating out "the vital few" from the "trivial many".
- C. Estimating how good the product really is.
- D. Spotlighting what has gone wrong with the program.
正解: B
質問 106
The failure rate for an IC chip is 0.0023 per hour of operation. Calculate the MTBF given that the failure rate is constant.
Response:
- A. 434.78 hrs
- B. 486 hrs
- C. 37.6 hrs
- D. 43 hrs
正解: A
質問 107
When failed field item are returned for failure investigation, which of the following steps should be taken first?
Response:
- A. The physics of failure should be used to determine failure mechanism.
- B. Each item's predicted reliability should be compared with its actual reliability.
- C. Each item should be investigated to classify and completely determine the failure mode
- D. The manufacturing process should be reviewed to ensure that it was followed during the production of the failed items.
正解: C
質問 108
For the ANOVA Table below, what is the Fcal statistic?
Response:
- A. 1.58
- B. 5.64
- C. 9.44
- D. 5.97
正解: D
質問 109
Using complete field-based data, a reliability engineer has analyzed the reliability growth of a repairable system over the last 24 months. The analysis suggests a "no growth" condition, and that finding is reported to management.
Due to a pending multimillion dollar order, management requests that a line be drawn to show growth where none actually exists. The engineer's department manager directs the engineer to comply with management request.
According to the ASQ Code of Ethics, which of the following is an appropriate action for the engineer to take next?
Response:
- A. Ask the department manager for support in presenting the original data to upper management in a more convincing way.
- B. Advise management of the consequences to expect if the engineer's professional judgement is overruled.
- C. Request a meeting with a representative from Occupational Safety and Hazard Administration (OSHA)
- D. Initiate new product reliability growth tests.
正解: B
質問 110
A key distinction between Taguchi designed experiments and classical designed experiments is that Taguchi designs Response:
- A. Are full-factorial and classical designs are not.
- B. Include 2-level factors and classical design do not.
- C. Are not orthogonal and classical designs are.
- D. Do not rely on randomization and classical experiments do.
正解: D
質問 111
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 probability density function of the product follows either a log normal or a Weibull distribution.
- B. The error in the population due to part-to-part variation is too large.
- C. The test time to provide adequate reliability assurance under normal operating conditions is too long.
- D. The current sample size and the life distribution show wear-out is likely
正解: C
質問 112
The investment in automated test equipment is often justified under which of the following circumstances Response:
- A. Conformance records are required.
- B. Repair times must be short.
- C. Traceable records are required.
- D. Numerous tests must be performed.
正解: D
質問 113
In order to sustain a high system reliability in the field, it is BEST to:
Response:
- A. Follow a preventive maintenance program with scheduled diagnostic checks.
- B. Write detailed reports on major failure modes.
- C. Lubricate the equipment exactly to manufacturing specifications.
- D. Fully analyze all failed components
正解: A
質問 114
All of the following Boolean algebra expression is incorrect EXCEPT?
Response:
- A. 1 + 0 = 1
- B. 1 - 0 = 0
- C. 1 - 1 = 1
- D. 1 + 1 = 2
正解: A
質問 115
A consideration for proper part selection is:
I. Parts application and specifications.
II. Selection, control and integration.
III. Derating.
Response:
- A. I, II and III
- B. I only
- C. II and III only
- D. I and III only
正解: A
質問 116
Which of the following failures would probably be considered a chargeable reliability failure?
Response:
- A. A nonrelevant failure.
- B. An unverified failure.
- C. A failure beyond expected life and not replaced.
- D. A repair induced failure.
正解: B
質問 117
The following fault tree diagram was developed by a team.
The probability are as follow:
A1 = 0.90 B1 = 0.90 C1 = 0.80
A2 = 0.80 B3 = 0.80 C2 = 0.70
A4 = 0.70
The likelihood that the system fault will occur is
Response:
- A. 0.4977
- B. 0.3686
- C. 0.5034
- D. 0.3073
正解: A
質問 118
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