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NEW QUESTION # 176
Which of the following is NOT an objective of a data collection program?
Response:
- A. To validate vendor supplied items.
- B. To produce reliability reports.
- C. To demonstrate reliability to customers.
- D. To demonstrate internal reliability.
Answer: B
NEW QUESTION # 177
A random sample of 100 bars of aluminum shows a tensile strength mean of 30,000 psi and a standard deviation of 3,000 psi. On the basis of this sample, what is the 95 percent confidence interval for the average tensile strength?
Response:
- A. 30,000 ± 600 psi
- B. 30,000 ± 588 psi
- C. 30,000 ± 768 psi
- D. 30,000 ± 528 psi
Answer: B
NEW QUESTION # 178
Analysis of data on all product returns is important because:
I. Failure rates change with length of product usage.
II. Changes in design and in customer use are often well reflected.
III. Immediate feedback and analysis of product performance becomes available.
Response:
- A. I only
- B. II and III only
- C. I, II and III
- D. I and III only
Answer: C
NEW QUESTION # 179
When designing experiments, which term describes the situation in which the effects of two factors are not separable?
Response:
- A. Collinear.
- B. Interactive.
- C. Covariate
- D. Confounded.
Answer: D
NEW QUESTION # 180
Laboratory tests of a new polymer prototype yielded the following proportions of a critical compound:
4.2 ppm, 4.1 ppm, 4.7 ppm, 4.9 ppm, 5.3 ppm
What is the sample standard deviation?
Response:
- A. 0.475
- B. 0.445
- C. 0.498
- D. 0.464
Answer: C
NEW QUESTION # 181
Which mathematical method provides a solution, has a time dimension and is solved numerically?
Response:
- A. Simulation model.
- B. Strength and stress model.
- C. Analytic solution.
- D. None of the above.
Answer: A
NEW QUESTION # 182
For a Weibull distribution the scale parameter, as a characteristic of time to failure, is a fixed percentile of the distribution regardless of its value. This percentile is:
Response:
- A. 63.3
- B. 36.7
- C. 31.6
- D. 63.2
Answer: D
NEW QUESTION # 183
Who should be chairperson of a design review committee?
Response:
- A. The chief designer.
- B. A senior member of management.
- C. The reliability engineer.
- D. The person best able to make decisions on a design.
Answer: D
NEW QUESTION # 184
Corrective maintenance is performed in order to
Response:
- A. Correct potential failure on a regular schedule before they occur.
- B. Reduce failure occurrence as directed by condition assessments.
- C. Restore a system to acceptable operation during scheduled downtime.
- D. Restore a system to acceptable operation after a failure has occurred.
Answer: D
NEW QUESTION # 185
What is meant by reliability assurance?
I. The probability of performing a specified function without failure under given conditions for a specified period of time.
II. The exercise of positive and deliberate measures to provide confidence that a specified reliability will be obtained.
III. The probability that a product or component will be accepted by the customer.
Response:
- A. III only
- B. I and II only
- C. II only
- D. I only
Answer: C
NEW QUESTION # 186
What is the factor of safety for the material?
Response:
- A. 0.75
- B. 0.66
- C. 1.50
- D. 1.33
Answer: D
NEW QUESTION # 187
Failure modes and effects analysis involves what activity?
Response:
- A. The study of the physics of failure to determine exactly how a product fails and what causes the failure.
- B. The determination of the probability of failure in a specified period of time.
- C. A study of the probability of success in a given time period.
- D. The expected number of failures in a given time interval.
Answer: A
NEW QUESTION # 188
Which of the following is an appropriate use for experimental design?
Response:
- A. Establishing product requirements.
- B. Ensuring the robust design of a product.
- C. Developing a fault-tree analysis.
- D. Analyzing customer complaint reports.
Answer: B
NEW QUESTION # 189
Which answer correctly describes the experimental design on the left?
Response:
- A. Greaeco-Latin Square.
- B. Youden Square.
- C. Latin Square.
- D. Randomezed Complete Block
Answer: A
NEW QUESTION # 190
What is the Z value needed to conduct a two tail test in a statistical inference problem, specifying 90% level of confidence?
Response:
- A. 1.96
- B. 1.65
- C. 1.28
- D. 2.24
Answer: B
NEW QUESTION # 191
Which of the following BEST describes complete data?
Response:
- A. Right-censored.
- B. Exact life.
- C. Truncated.
- D. Left-censored.
Answer: B
NEW QUESTION # 192
The MOST valid source of failure rate data is:
Response:
- A. Operational data.
- B. Test data obtained under very closely controlled conditions.
- C. Environmental test data.
- D. The manufacturing process.
Answer: A
NEW QUESTION # 193
The reliability manager or engineer attend and participate in :
Response:
- A. All of the design review meetings.
- B. The later design review meetings that discuss production issues.
- C. Design review meetings where life-cycle-costs are discussed.
- D. The initial design review meetings.
Answer: A
NEW QUESTION # 194
An air handling system has a MTBF of 8000 hours, MTBMct of 120 hours, and MMT (mean maintenance action time) of 230 hours. Determine the potential availability.
Response:
- A. 0.9721.
- B. 0.9575.
- C. 0.9852.
- D. 0.9866.
Answer: C
NEW QUESTION # 195
The following reliability block diagram shows components A, B, C, D and E with reliability Ra, Rb, Rc, Rd and Re, respectively. A or B are system entry points.
On the basis of this information, what is the reliability of the system?
Response:
- A. Ra Rc [1 - (1 - Rd) (1 - Re)] + (1 - Ra) Rb Rc [1 - (1 - Rd) (1 - Re)]
- B. Ra Rb [1 - (1 - Rd) (1 - Re)] Rc (1 - Ra) Rb [1 - (1 - Rd) (1 - Re)]
- C. Ra Rc [1 - (1 - Rd Re)] + (1 - Ra) Rb Rc [1 - (1 - Rd) (1 - Re)]
- D. [1 - (1 - Ra Rb)] Rc [1 - (1 - Rd Re)]
Answer: A
NEW QUESTION # 196
Which of the following is TRUE about hypothesis testing?
Response:
- A. Type ll( β) risk is the producer's risk.
- B. Type ll( β) risk is the risk of rejecting a null hypothesis when the alternative is true.
- C. Type l ( α) risk is the risk of rejecting a null hypothesis when it is true
- D. Type l ( α) risk is the consumer's risk.
Answer: C
NEW QUESTION # 197
A field test may be considered satisfactory if:
Response:
- A. The human factors engineers can operate the equipment under all required conditions.
- B. Alternate operators can operate the equipment under all required conditions.
- C. The design engineer can operate the equipment under all required conditions.
- D. The reliability engineer can operate the equipment under all required conditions.
Answer: B
NEW QUESTION # 198
It is of primary importance that the choice of the time-to-failure distribution to represent a particular reliability situation be based on:
Response:
- A. Representation of the failure mechanism.
- B. Convenience
- C. Empirical grounds.
- D. Simplicity of use.
Answer: A
NEW QUESTION # 199
The investment in automated test equipment is often justified under which of the following circumstances Response:
- A. Conformance records are required.
- B. Numerous tests must be performed.
- C. Traceable records are required.
- D. Repair times must be short.
Answer: B
NEW QUESTION # 200
As a result of improper machining, a gear-tooth in a vehicle's transmission breaks causing the transmission to lock up and the vehicle to crash, injuring the driver. The failure mode in this case should be identified by the reliability engineer as the Response:
- A. Improper machining.
- B. Vehicle crash.
- C. Injured driver.
- D. Jammed transmission.
Answer: D
NEW QUESTION # 201
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