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質問 15
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 16
Maintenance times on simple with straightforward repair will fit which of the following distributions?
Response:
- A. Geometric.
- B. Normal.
- C. Exponential.
- D. Lognormal.
正解: B
質問 17
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 18
FMECA is:
Response:
- A. A technique useful for space-government project.
- B. A professional engineering organization.
- C. A formal technique for review of failure potentials during design.
- D. A technique to assure that design performance guidelines are fulfilled.
正解: C
質問 19
Which of the following is the main advantage of a step stress test?
Response:
- A. It runs at constant stress
- B. It segregate discrepant hardware
- C. It guarantees accurate estimates
- D. It yields failure quickly
正解: D
質問 20
A key distinction between Taguchi designed experiments and classical designed experiments is that Taguchi designs Response:
- A. Do not rely on randomization and classical experiments do.
- B. Include 2-level factors and classical design do not.
- C. Are full-factorial and classical designs are not.
- D. Are not orthogonal and classical designs are.
正解: A
質問 21
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 22
Random sampling plans are based on which of the following assumption?
Response:
- A. The process is unstable.
- B. A specific dependency model has been selected.
- C. Every item has an equal chance of being selected.
- D. The data are accurate.
正解: C
質問 23
What is the MOST accurate method to verify that the maintainability requirement of a design is being met?
Response:
- A. By thorough design reviews.
- B. By analysis of the design.
- C. By demonstration at the customer's facility.
- D. By performing maintainability prediction.
正解: C
質問 24
Reliability Growth is:
I. Often mathematically modeled with the Duane or AMSSA approaches.
II. The existence of more than one means for accomplishing a given functions.
III. Improvement of a reliability parameter by correcting deficiencies in the design.
Response:
- A. III only
- B. I and II only
- C. II only
- D. I and III only
正解: D
質問 25
Which of the following forms of reliability data will BEST provide valuable information on product usage and reliability?
Response:
- A. Field support data
- B. In-house test results
- C. Quality control data.
- D. Independent lab results.
正解: A
質問 26
Which of the following activities prioritizes failure modes based on probability of failure, severity, and consequences?
Response:
- A. FRACAS.
- B. FTA
- C. FMEA
- D. FURPS.
正解: C
質問 27
The design function which assigns probability of failures between components or subsystems is called:
Response:
- A. Significance
- B. Apportionment
- C. Qualification
- D. Confidence
正解: B
質問 28
Failure data are analyzed and a proportion of items survive to the end of the test. Data on these types of samples are referred as:
Response:
- A. Non-parameter data.
- B. Control data
- C. Censored Data.
- D. Parameter data
正解: C
質問 29
What is the Z value needed to conduct a two tail test in a statistical inference problem, specifying 90% level of confidence?
Response:
- A. 1.28
- B. 1.65
- C. 2.24
- D. 1.96
正解: B
質問 30
The BEST way to set an overall reliability goal is to:
Response:
- A. Write a specification calling for a product to have high reliability and incorporate it into a contract.
- B. Insist that the goal be expressed in terms of mean-time-between-failures for all components and assemblies.
- C. Indicate who would be at fault if the desired reliability is not obtained during the warranty.
- D. Put down specific numerical requirements for reliability statements of operating environments, and a definition of successful product performance.
正解: D
質問 31
A substantial fraction of the usual design effort need NOT be devoted to a reliability program.:
Response:
- A. When high reliability is specified.
- B. When time is limited.
- C. When the equipment is complex.
- D. When high reliability is not specified.
正解: D
質問 32
In a certain application, two identical transducers are used to measure the vacuum in a system. The system is considered to have failed if either of the vacuums read by the transducers varies from the standard by more than 10mm Hg.
Which of the following is the correct reliability logic block diagram for the transducer assembly?
Response:
- A. Option D
- B. Option B
- C. Option C
- D. Option A
正解: D
質問 33
In the House of Quality, the principal matrix shows the relationship between:
Response:
- A. Specifications and Results.
- B. Quality Requirements and Quality Inspection.
- C. Reliability Results and Time.
- D. Wants and Hows.
正解: D
質問 34
In the bath curve model, which one of the sections represents the period when catastrophic failure are likely to occur?
Response:
- A. All periods.
- B. Infant mortality
- C. Wear out period.
- D. Constant failure rate period.
正解: A
質問 35
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 36
Which of the following is the key component in continuously providing a reliable product?
Response:
- A. Scheduled equipment maintenance actions.
- B. Adequately train the work force.
- C. Reduce product variability.
- D. Improve supplier acceptance testing.
正解: C
質問 37
In order to attain a high order of series reliability:
Response:
- A. The number of parts must be kept to a minimum.
- B. The number of parts must be increased.
- C. The number of parts must have a low failure variance.
- D. The number of parts is insignificant if each part has a reliability of 99 percent of more.
正解: A
質問 38
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