CRE無料問題集「ASQ Certified Reliability Engineer (CRE)」

質問 1

A person takes their car to the repair shop and it stops doing what it was previously doing. This is an example of:
Response:

（A）Catastrophic failure.

（B）Intermittent failure.

（C）Degradation failure.

（D）Drift failure.

正解：B 解答を投票する

質問 2

In a design team environment, the reliability function can influence product reliability principally by:
Response:

（A）Conducting internal and external failure analyses.

（B）Providing repair and maintenance service information.

（C）Integrating the reliability requirements into product design.

（D）Developing reliability tests and procedures.

正解：C 解答を投票する

質問 3

Weibull analysis is a way to quickly and easily analyze field data or interval test data. The limits of the use of this technique include having a good estimate for the:
Response:

（A）Average quality of the production lots.

（B）Expected life.

（C）MTBF.

（D）Shape parameter.

正解：D 解答を投票する

質問 4

Fifteen(15) motors were tested for a total of 1,200 cumulative hours, with four failure occuring. The test was then failure-truncated. If the failure rate is assumed to be constant, what is the 95% lower confidence limit of MTBF?
Response:

（A）155 hours.

（B）131 hours.

（C）609 hours

（D）876 hours.

正解：A 解答を投票する

質問 5

It is often observed that unscheduled maintenance:
Response:

（A）Isolates failure causes more quickly than scheduled maintenance.

（B）Never isolates the specific causes of failure.

（C）Does not necessarily isolate failure causes.

（D）Always isolates the specific causes of failure.

正解：C 解答を投票する

質問 6

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）0.1875

（C）0.5000

（D）0.0625

正解：B 解答を投票する

質問 7

Human will perform more reliably if:
I. They understand what is required and why.
II. The task is challenging and complex.
III. Pressure is applied which penalizes failure.
IV. There are incentives for quality.
Response:

（A）II and IV only

（B）I and III only

（C）I and II only

（D）I and IV only

正解：D 解答を投票する

質問 8

When testing is establish failure rate data and reliability predictions, which of the following is NOT normally a feasible acceleration factor with respect to rated conditions?
Response:

（A）Longer time.

（B）Higher voltage.

（C）Greater humidity.

（D）Higher temperature.

正解：A 解答を投票する

質問 9

Which of the following activities is MOST effective in increasing reliability during a product's life cycle?
Response:

（A）Developing capable processes.

（B）Improving gage repeatability and reproducibility

（C）Developing robust design.

（D）Developing an aggressive testing strategy.

正解：C 解答を投票する

質問 10

A plastics plant operates 8 extruders producing plastic film. Production volume requirements cannot be met if less than 6 extruders are operating. There is a .30 probability that a machine stopping malfunction will occur.
What is the probability that 6 extruders can remain operating throughout the day?
Response:

（A）0.8059

（B）0.5783

（C）0.4482

（D）0.5518

正解：D 解答を投票する

質問 11

Given the sample data: 5, 15, 10, 7, 20. What is the unbiased estimator of the sample variance?
Response:

（A）27.50

（B）46.62

（C）29.84

（D）37.30

正解：D 解答を投票する

質問 12

The maintainability for a system is based on the
Response:

（A）Total repair time.

（B）Total preventive-maintenance time.

（C）Time to start up a redundant system.

（D）Operating time.

正解：A 解答を投票する

CRE 無料問題集「ASQ Certified Reliability Engineer (CRE)」

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