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質問 144
The maintenance action rate (MAR) may be mandated by contract. If an extruder is run continuously and experiences 24 maintenance actions (downtown) in one year, what is the MAR?
Response:
- A. 0.0027 acions/hr.
- B. 0.00135 actions/hr.
- C. 0.0417 actions/hr
- D. 0.0054 actions/hr.
正解: A
質問 145
Corrective maintenance is performed in order to
Response:
- A. Reduce failure occurrence as directed by condition assessments.
- B. Restore a system to acceptable operation during scheduled downtime.
- C. Restore a system to acceptable operation after a failure has occurred.
- D. Correct potential failure on a regular schedule before they occur.
正解: C
質問 146
Highly repetitive operations should be assigned to:
Response:
- A. An operator assisted by a computer.
- B. A machine.
- C. An operator.
- D. A machine and operator performing the same task alternately.
正解: B
質問 147
The continuous improvement process can be guided by several techniques. Which of the following is the BEST approach?
Response:
- A. The original seven quality tools
- B. Use of the PDCA cycle
- C. The new seven quality management tools
- D. Multi-vari charts
正解: B
質問 148
Which of the following can be used to determine the MTTR?
Response:
- A. Mean maintenance action time.
- B. Mean time between failures.
- C. Mean time between maintenance actions.
- D. Mean time between failures and potential availability.
正解: D
質問 149
Which of the following is an analytical approach used during the manufacturing process where process conditions are changed systematically for the purpose of determining modifications required for product improvement?
Response:
- A. Taguchi method.
- B. Cause-and-effect analysis.
- C. Fractional factorial experiment design
- D. Statistical process control.
正解: D
質問 150
All of the following are purposes of a production reliability assurance test (PRAT) EXCEPT Response:
- A. Detect significant shifts between the as-built reliability requirements and the as-designed reliability requirements
- B. Assess performance against reliability requirements.
- C. Minimize the need for specific process controls
- D. Assess actual product reliability against reliability requirements.
正解: C
質問 151
Who should be chairperson of a design review committee?
Response:
- A. A senior member of management.
- B. The person best able to make decisions on a design.
- C. The chief designer.
- D. The reliability engineer.
正解: B
質問 152
The department having the authority to sign all deviations pertaining to the design of the product is normally:
Response:
- A. Manufacturing engineering.
- B. Contractual
- C. Design engineering.
- D. Inspection
正解: C
質問 153
An undesired event in a system led to the below fault tree. Which of the following are the cut sets of the fault tree?
Response:
- A. {A}, {B1, B2}
- B. {A, B1} {A, B2}
- C. {A}, {A, B1}
- D. {A, B1}, {B2}
正解: B
質問 154
Which of the following techniques is NOT used when derating parts to enhance their overall reliability?
Response:
- A. Derating for temperature.
- B. Lower power dissipation.
- C. Derating for stress.
- D. Use of 100% rating.
正解: D
質問 155
When reliability people say they are breaking the monopoly of the designer they mean Response:
- A. They insist on having final approved of the design.
- B. They are relieving the designer of his/her responsibility for the design.
- C. They intend to put the reliability engineer organizationally higher than the design engineer.
- D. They intend to review the design in conjunction with other experts.
正解: D
質問 156
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. 0.952
- B. 0.998
- C. 0.986
- D. 0.994
正解: B
質問 157
Nonrelevant failures include all of the following EXCEPT:
Response:
- A. Mishandling failures
- B. Unverified failures.
- C. Operating adjustment failures.
- D. Human error failures.
正解: B
質問 158
From a company's point of view, which of the following costs would be LEAST appropriate for determining the cost of reliability?
Response:
- A. Life testing.
- B. Warranty cost.
- C. Reliability training
- D. Equipment depreciation.
正解: D
質問 159
Which of the following activities is MOST effective in increasing reliability during a product's life cycle?
Response:
- A. Developing an aggressive testing strategy.
- B. Improving gage repeatability and reproducibility
- C. Developing robust design.
- D. Developing capable processes.
正解: C
質問 160
The primary aim of sequential-life testing is to determine
Response:
- A. The mean time between failures (MTBF).
- B. Whether a lot meets the reliability goal.
- C. Whether the stress-level variation is significant.
- D. The probability density function of failures.
正解: B
質問 161
Product safety standards do NOT include:
Response:
- A. Product requirements laws passed by government
- B. Requirements for general, equipment and component safety.
- C. Performance requirements for products.
- D. Evaluation requirements for product safety testing.
正解: C
質問 162
Which of following is NOT elements of risk priority number for FMEA?
Response:
- A. Catastrophic
- B. Detection
- C. Severity
- D. Probability
正解: A
質問 163
One method of evaluating the design reliability is to analyze the design assuming the worst case. Which of the following techniques is NOT applicable for worst case analysis?
Response:
- A. Eyring model
- B. Root-sum squared.
- C. Monte Carlo
- D. Extreme value
正解: A
質問 164
Specifications are written on parts to:
I. Enable procurement to buy usable parts.
II. Establish mechanical, functional, environmental and reliability requirements.
III. Provide inspection criteria.
Response:
- A. I and II
- B. All of the above.
- C. II
- D. I
正解: B
質問 165
For complex electronics systems, the major contributor to repair time is generally:
Response:
- A. Remove/replace.
- B. Final checkout.
- C. Diagnosis.
- D. Disassembly/reassembly.
正解: C
質問 166
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