Updated Nov-2021 Pass CRE Exam - Real Practice Test Questions
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NEW QUESTION 137
Measures of availability include:
I. Effectiveness.
II. Inherent.
III. Achieved.
IV. Dependability.
V. Capability.
Response:
- A. III, IV and V
- B. II, III and IV
- C. II and III only
- D. I, III and IV
Answer: C
NEW QUESTION 138
A consideration for proper part selection is:
I. Parts application and specifications.
II. Selection, control and integration.
III. Derating.
Response:
- A. I and III only
- B. II and III only
- C. I, II and III
- D. I only
Answer: C
NEW QUESTION 139
A company has produced a new module. The failure data on 40 returns are shown below.
Which of the following is the first step in the review of this situation ?
Response:
- A. Determine the location in which the failure occurred.
- B. Identify the field service personnel who handled the returns.
- C. Categorize the data by using a Pareto analysis.
- D. Find the median of the data set.
Answer: A
NEW QUESTION 140
Preliminary hazard analysis:
I. Is a review of safety problems prior to production.
II. Is normally done at a time when there is little design detail.
III. Can be used to identify the principal hazards when the product is first conceived.
Response:
- A. I and II only
- B. I, II and III
- C. III only
- D. I only
Answer: B
NEW QUESTION 141
Which of the following is an appropriate use for experimental design?
Response:
- A. Ensuring the robust design of a product.
- B. Establishing product requirements.
- C. Developing a fault-tree analysis.
- D. Analyzing customer complaint reports.
Answer: A
NEW QUESTION 142
Which of the following statements is TRUE nonrepairable items?
Response:
- A. 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
- B. Their primary unit of measure is failure severity.
- C. Their primary unit of measure is mean time to replace.
- D. Reliability is survival probability over the expected life of the items when only one failure can occur
Answer: D
NEW QUESTION 143
Which of the following is a model used for monitoring reliability growth?
Response:
- A. Normal
- B. Duane
- C. Lognormal
- D. Arrehenius
Answer: B
NEW QUESTION 144
What is the Z value needed to conduct a two tail test in a statistical inference problem, specifying 90% level of confidence?
Response:
- A. 2.24
- B. 1.96
- C. 1.28
- D. 1.65
Answer: D
NEW QUESTION 145
What is the general use of an R chart?
Response:
- A. To determine the variance of the process.
- B. To determine if the process mean is in control.
- C. To determine if the process is in control.
- D. To determine if the process variance is in control.
Answer: D
NEW QUESTION 146
Corrective maintenance is performed in order to
Response:
- A. Restore a system to acceptable operation after a failure has occurred.
- B. Correct potential failure on a regular schedule before they occur.
- C. Reduce failure occurrence as directed by condition assessments.
- D. Restore a system to acceptable operation during scheduled downtime.
Answer: A
NEW QUESTION 147
System and cost effectiveness analysis outputs:
Response:
- A. Do not guide trade-off decisions.
- B. Can be used to determine the best balance of system performance, cost and schedule.
- C. In most cases will not identify the degree to which innovations should be pursued.
- D. Will not guide preliminary design features.
Answer: B
NEW QUESTION 148
For a reliability plan to be most effective, the reliability tasks should be integrated with which of the following plan?
Response:
- A. Product design and development.
- B. Product sales.
- C. Product distribution
- D. Reliability centered maintenance.
Answer: A
NEW QUESTION 149
All of the following statements are TRUE about confidence interval EXCEPT Response:
- A. A larger sample size would yield a smaller width
- B. The width does not depend on the confidence level.
- C. The width indicate the uncertainty in estimates.
- D. A smaller sample size would yield a larger width
Answer: B
NEW QUESTION 150
Which answer mathematically expresses the reliability of an active parallel system in which all component reliabilities are unequal?
Response:
- A. Rs = [RaRbRc + RaRb + RbRc + RaRc ] / [Ra + Rb + Rc]
- B. Rs = RaRbRc - (RaRb + RbRc + RaRc) + (Ra + Rb + Rc)
- C. Rs = Ra + Rb + Rc - RaRbRc
- D. Rs = [RaRbRc] / [Ra + Rb + Rc]
Answer: B
NEW QUESTION 151
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.
Answer: A
NEW QUESTION 152
The purpose of a failure reporting, analysis and corrective action system(FRACAS) includes which two of the following?
I. Provide a closed loop failure reporting system.
II. Provide initial robust product designs.
III. Provide management with derating methods and principles.
IV. Provide a failure analysis and corrective action vehicle.
Response:
- A. II, IV
- B. II, III
- C. I, II
- D. I, IV
Answer: D
NEW QUESTION 153
When a defense is prepared for a product liability action, all of the following would be considered elements of the assumption of risk the plaintiff must have EXCEPT:
Response:
- A. Voluntarily undertaken the risk.
- B. Had knowledge of the risk
- C. Contributed to the injury through negligence.
- D. Understood the consequence of the risk.
Answer: C
NEW QUESTION 154
In a software development project, which of the following elements is NOT essential to ensure a reliable product?
Response:
- A. Ensuring that requirements based testing is performed.
- B. Specifying the software requirements in complete detail.
- C. Documenting changes made to the software during development.
- D. Performing a failure mode, effects, and criticality analysis on the software
Answer: D
NEW QUESTION 155
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.
According to the ASQ Code of Ethics, which of the following is an appropriate action for the engineer to take next?
Response:
- A. Advise management of the consequences to expect if the engineer's professional judgement is overruled.
- B. Ask the department manager for support in presenting the original data to upper management in a more convincing way.
- C. Request a meeting with a representative from Occupational Safety and Hazard Administration (OSHA)
- D. Initiate new product reliability growth tests.
Answer: A
NEW QUESTION 156
Availability of a system is roughly the:
Response:
- A. Product of the individual subsystem availabilities.
- B. The quotient of the individual subsystem availability.
- C. Sum of the individual system availabilities.
- D. The difference of the individual subsystem.
Answer: A
NEW QUESTION 157
Which of these terms is commonly used as the probability of rejecting material produced at an unacceptable quality level?
Response:
- A. α only
- B. 1 - α only
- C. 1 - β only
- D. β only
Answer: C
NEW QUESTION 158
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. 0.498
- B. 0.445
- C. 0.475
- D. 0.464
Answer: A
NEW QUESTION 159
What is the reliability of the power switching system schematic on the left after 30,000 hours ? The electric utility primary power system (A) has a failure rate of 0.00001 failure/hour.
The motor generator backup system (B) has a failure rate of 0.0007 failure/hour. The standby system has an imperfect switch with 0.90 reliability per operation.
Response:
- A. 0.83
- B. 0.75
- C. 0.87
- D. 0.80
Answer: B
NEW QUESTION 160
As the reliability engineer of a medium sized firm, you have developed a reliability test plan for the shop.
The shop manufactures products on a medium batch size basis. The batches range from 30 to 500 pieces per order. The test plan should include all of the following consideration EXCEPT Response:
- A. Inspect the majority of parts produced.
- B. Provide a safe testing environment.
- C. Discover every failure mode.
- D. Estimate MTBF values.
Answer: A
NEW QUESTION 161
In general, reliability testing is performed for which of the following reasons?
I. To detect unanticipated failure modes.
II. To compare estimated failure rates to actual failure rates.
III. To monitor reliability growth over time.
IV. To meet or exceed customer expectations.
Response:
- A. I and III only
- B. II and IV only
- C. I, II, III and IV
- D. I, II and III only
Answer: C
NEW QUESTION 162
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