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NEW QUESTION 257
Maintainability is:
Response:
- A. Maintaining a machine in satisfactory working condition.
- B. The probability of a system being restored to functional operation within a given period of time.
- C. Performing adequate maintenance on a system.
- D. Probability of survival of a system for a given period of time.
Answer: B
NEW QUESTION 258
The optimum cost point for total life cycle costs occurs:
Response:
- A. When operations and maintenance costs are minimized.
- B. When acquisition costs plus ongoing costs are minimized.
- C. When manufacturing and development costs are minimized.
- D. When reliability program expenditures are maximized.
Answer: B
NEW QUESTION 259
What is the first step when conducting a maintainability study for a piece of existing equipment?
Response:
- A. Instituting a failure reporting and corrective action system (FRACAS) process.
- B. Identifying the problems that are causing the majority of downtime.
- C. Calculating the availability of the equipment.
- D. Analyzing the root causes of the downtime.
Answer: B
NEW QUESTION 260
In a FMECA, the potential failure modes are determined in order to improve system reliability. The effort to assess the severity of failure effects is part of the:
Response:
- A. Design potential.
- B. Risk analysis.
- C. Modeling determination.
- D. Criticality analysis.
Answer: D
NEW QUESTION 261
Which answer is the expected value of the Poisson distribution shown below?
Response:
- A. e - μ
- B. μe - μ
- C. μ 2
- D. μ
Answer: D
NEW QUESTION 262
Which of the following forms of reliability data will BEST provide valuable information on product usage and reliability?
Response:
- A. In-house test results
- B. Quality control data.
- C. Field support data
- D. Independent lab results.
Answer: C
NEW QUESTION 263
The MOST valid source of failure rate data is:
Response:
- A. The manufacturing process.
- B. Test data obtained under very closely controlled conditions.
- C. Environmental test data.
- D. Operational data.
Answer: D
NEW QUESTION 264
A series system whose reliability at 5 hours is 0.80, has three components with these historical constant failure rates:
λ 1 = failure rate for component 1 = 0.04 failures/hour
λ 2 = failure rate for component 2 = 0.07 failures/hour
λ 3 = failure rate for component 3 = 0.01 failures/hour
Three of the four answers are the three component reliabilities at 5 hours. Which is incorrect?
Response:
- A. 0.9283
- B. 0.9123
- C. 0.9816
- D. 0.8780
Answer: B
NEW QUESTION 265
In order to attain a high order of series reliability:
Response:
- A. The number of parts must be increased.
- B. The number of parts must have a low failure variance.
- C. The number of parts must be kept to a minimum.
- D. The number of parts is insignificant if each part has a reliability of 99 percent of more.
Answer: C
NEW QUESTION 266
Which of the following is a basic element in the corrective action process?
Response:
- A. Identify failure for trend analysis.
- B. Investigate problems to determine root causes.
- C. Apply Pareto analysis to failure.
- D. Limit manufacturing expenses
Answer: B
NEW QUESTION 267
System and cost effectiveness analysis outputs:
Response:
- A. Will not guide preliminary design features.
- B. Can be used to determine the best balance of system performance, cost and schedule.
- C. Do not guide trade-off decisions.
- D. In most cases will not identify the degree to which innovations should be pursued.
Answer: B
NEW QUESTION 268
Which of the following statements is TRUE nonrepairable items?
Response:
- A. Their primary unit of measure is failure severity.
- B. Their primary unit of measure is mean time to replace.
- C. Reliability is the survival probability that failure of the items will not occur during the period of interest when more than one failure can occur
- D. Reliability is survival probability over the expected life of the items when only one failure can occur
Answer: D
NEW QUESTION 269
Which of the following is the MOST effective technique for prioritizing critical factors for problem- solving?
Response:
- A. Venn diagram
- B. Pareto diagram
- C. Cause-and-effect diagram
- D. Scatter diagram.
Answer: B
NEW QUESTION 270
The techniques of design control are:
Response:
- A. Applicable generally throughout industry.
- B. Unique to the aerospace industry.
- C. Too expensive for general application.
- D. Limited to hardware-manufacturing enterprises.
Answer: A
NEW QUESTION 271
For a high compression aircraft air conditioning system, the MTBF is 100 hours. This mean life is allocated for four serial units comprising the total system. The unit failure rates are then weighted as follows:
w 1 = 0.1250 w 3 = 0.1875
w 2 = 0.2500 w 4 = 0.4375
Based upon the above data, indicate which of the following is the correct calculation for one of the units.
Response:
- A. λ 3 = 0.0018750
- B. λ 4 = 0.0435700
- C. λ 1 = 0.0125000
- D. λ 2 = 0.0025100
Answer: A
NEW QUESTION 272
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.
The system is released without improvements and the company receives the multimillion dollar order from an external customer. The customer then requests evidence of the reliability growth. Which of the following actions by the engineer would be MOST appropriat?
Response:
- A. Arrange a meeting with the customer and discuss all past occurrences
- B. Ask the department manager to respond to the customer's request.
- C. Revisit the original data and project artificial reliability growth to satisfy the customer's request.
- D. Arrange a meeting with the department manager and upper management to discuss the reliability report.
Answer: D
NEW QUESTION 273
A mission profile is:
I. Time-phased.
II. A summary of events and environments.
III. All activities from initiation to completion of a mission.
Response:
- A. III only
- B. I, II and III
- C. I and III only
- D. II and III only
Answer: B
NEW QUESTION 274
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