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NEW QUESTION 260
A field test may be considered satisfactory if:
Response:
- A. Alternate operators can operate the equipment under all required conditions.
- B. The reliability engineer can operate the equipment under all required conditions.
- C. The human factors engineers can operate the equipment under all required conditions.
- D. The design engineer can operate the equipment under all required conditions.
Answer: A
NEW QUESTION 261
The software test design method that involves seeding errors into a program is known is:
Response:
- A. Customer defect reports.
- B. Fault insertion and error handling.
- C. Test cases.
- D. Equivalent class partitioning.
Answer: B
NEW QUESTION 262
A primary purpose of burn-in testing of parts is to
Response:
- A. Ensure that parts operate at elevated temperatures.
- B. Measure the temperature/stress distribution of parts.
- C. Eliminate substandard parts.
- D. Ensure that parts are safe.
Answer: C
NEW QUESTION 263
Derating parts in specific applications is performed in order to:
Response:
- A. Lower the stress limits to lower failure rates.
- B. Establish a preferred parts list.
- C. Determine the stress ratios.
- D. Show which parts are inferior in design.
Answer: A
NEW QUESTION 264
The term "failure mode" is defined as the:
Response:
- A. Failure caused by the failure of an associated items.
- 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. Physical, chemical, electrical, or thermal process that results in failure.
Answer: B
NEW QUESTION 265
The techniques of design control are:
Response:
- A. Limited to hardware-manufacturing enterprises.
- B. Applicable generally throughout industry.
- C. Too expensive for general application.
- D. Unique to the aerospace industry.
Answer: B
NEW QUESTION 266
What is the MOST important role performed by a failure review board?
Response:
- A. To assess failures.
- B. To ensure that corrective action is effective.
- C. To monitor corrective action.
- D. To monitor reliability growth.
Answer: B
NEW QUESTION 267
For single-failure modes, the probability plotting methods used to derive time-to-failure distribution parameters are applicable only when the data are Response:
- A. Independently and normally distributed.
- B. Exponentially distributed.
- C. Gathered for repairable systems.
- D. Independently and identically distributed.
Answer: D
NEW QUESTION 268
Which of the following is TRUE about the distribution of the mean for large samples?
Response:
- A. It is the same as the population distributions.
- B. It is normally distributed.
- C. It is lognormally distributed.
- D. It is exponentially distribution.
Answer: B
NEW QUESTION 269
The comparative financial effects of reliability over the designed operating time T of two systems built to perform the same function can be obtained by comparing the
I. Failure rates.
II. Operating life of each system.
III. Cost of each system (including repair, replacement, and loss).
Response:
- A. II and III only
- B. I, II and III
- C. I and III only
- D. II only
Answer: B
NEW QUESTION 270
In a design team environment, the reliability function can influence product reliability principally by:
Response:
- A. Integrating the reliability requirements into product design.
- B. Conducting internal and external failure analyses.
- C. Developing reliability tests and procedures.
- D. Providing repair and maintenance service information.
Answer: A
NEW QUESTION 271
Human factors field testing:
Response:
- A. Should be carried out on a production model of the equipment.
- B. Should demonstrate the capability of personnel to perform the required function.
- C. Does not require a plan if military personnel are involved.
- D. Must not be combined with engineering tests on the same equipment.
Answer: B
NEW QUESTION 272
A randomly failing component is tested to r failures, and n observations are made. Degrees of freedom for calculating confidence limits on the mean should be:
Response:
- A. 2r
- B. n
- C. n - 1
- D. 2r + 2
Answer: A
NEW QUESTION 273
Which of the following techniques is MOST beneficial in tracking a process to determine whether corrective action should be taken?
Response:
- A. Pareto analysis.
- B. Time series plotting.
- C. Trend analysis.
- D. Control charting.
Answer: D
NEW QUESTION 274
When parts are selected for a product in development, which of the following key elements should be considered first?
Response:
- A. Availability
- B. Serviceability
- C. Application.
- D. Cost
Answer: C
NEW QUESTION 275
A vendor must perform tests on parts to determine which of the following?
Response:
- A. Configuration and size.
- B. Cost.
- C. Materials and processes.
- D. Functional capability under specified environmental conditions.
Answer: D
NEW QUESTION 276
Which of the following statistical distributions can be used to compare sample means?
Response:
- A. Exponential
- B. t test.
- C. Normal.
- D. Chi-square.
Answer: B
NEW QUESTION 277
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, II and III
- B. I and II only
- C. I only
- D. I and III only
Answer: A
NEW QUESTION 278
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
Answer: D
NEW QUESTION 279
The MOST desirable outcome of an FMEA is
Response:
- A. A risk priority number
- B. An estimated of the detection number.
- C. An estimated of the occurrence number.
- D. A recommended action
Answer: D
NEW QUESTION 280
When designing experiments, which term describes the situation in which the effects of two factors are not separable?
Response:
- A. Interactive.
- B. Covariate
- C. Confounded.
- D. Collinear.
Answer: C
NEW QUESTION 281
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