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CRE - Certified Reliability Engineer (CRE) Practice Tests 2021 | PassReview
NEW QUESTION 152
In the area of risk assessment, hazard severity categories are used to provide a measure of the seriousness involved. A system failure causing major environmental damage would be classified as:
Response:
- A. Critical
- B. Catastrophic.
- C. Negligible
- D. Marginal
Answer: A
NEW QUESTION 153
Equivalence class partitioning is:
Response:
- A. A white-box method that divides errors into classes to reduce the amount of testing required.
- B. A black-box method that divides program functions into related groups for testing.
- C. A white-box method that divides control paths into dependent and independent categories for testing.
- D. A black-box method that divides the inputs to a program into classes from which test cases can be derived.
Answer: D
NEW QUESTION 154
Risk management includes which of the following?
I. Integration of risk evaluation in all design phases.
II. Knowledge and consideration of liability law.
III. Adopting procedures, policies and practices to control risks.
IV. Providing product labels and operator manuals where appropriate.
Response:
- A. II and IV only
- B. I, II and IV only
- C. I, II, III and IV
- D. I, II and III only
Answer: C
NEW QUESTION 155
Human factors in product safety planning are assessed for which of the following reasons?
I. To allocate the proper balance between man and machine.
II. To address the limitations of human beings.
III. To determine the user hardware interaction.
Response:
- A. III only
- B. I and III only
- C. I, II and III
- D. I and II only
Answer: C
NEW QUESTION 156
Reliability objectives and requirements should be set in which of the following life cycle phases?
Response:
- A. Concept and design.
- B. Validation and test.
- C. Full scale design and development.
- D. Operation and repair.
Answer: A
NEW QUESTION 157
Which mathematical method provides a solution, has a time dimension and is solved numerically?
Response:
- A. Simulation model.
- B. Strength and stress model.
- C. None of the above.
- D. Analytic solution.
Answer: A
NEW QUESTION 158
In the Taguchi design methodology, what are noise factors?
Response:
- A. Factors that influence variation in the output
- B. Factors that impact tolerance design
- C. Factors that strongly influence the mean response.
- D. Factors that maximize parameter design.
Answer: A
NEW QUESTION 159
A go/no-go device is tested until it fails. If X is the number of tests to first failure with no wear out present, and the probability of success on each test is .99, then the probability that X is greater than 5 is:
Response:
- A. 0.9510
- B. 0.9410
- C. 0.9610
- D. 0.9310
Answer: A
NEW QUESTION 160
Regarding computer hardware and software reliability, which of the available answers would NOT enhance software reliability?
I. Structured programming.
II. Redundant code programming.
III. Modular programming.
IV. Programming for fault tolerance.
Response:
- A. II and IV only
- B. I and III only
- C. II only
- D. All of the options will enhance software reliability
Answer: C
NEW QUESTION 161
The reliability growth factor is MOST important to consider in which of the following situation?
Response:
- A. Option D
- B. Option B
- C. Option A
- D. Option C
Answer: A
NEW QUESTION 162
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 = Ra + Rb + Rc - RaRbRc
- C. Rs = [RaRbRc] / [Ra + Rb + Rc]
- D. Rs = [RaRbRc + RaRb + RbRc + RaRc ] / [Ra + Rb + Rc]
Answer: A
NEW QUESTION 163
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. Request a meeting with a representative from Occupational Safety and Hazard Administration (OSHA)
- B. Advise management of the consequences to expect if the engineer's professional judgement is overruled.
- C. Ask the department manager for support in presenting the original data to upper management in a more convincing way.
- D. Initiate new product reliability growth tests.
Answer: B
NEW QUESTION 164
A data collection, analysis, and reporting system should:
I. Permit detailed failure and failure rate analysis for varying environments, time periods, storage conditions, etc.
II. Provide distinction between items that failed and item that were wrongly removed.
III. Report data on successes as well as failures.
Response:
- A. I and III only
- B. I, II and III
- C. I only
- D. II and III only
Answer: B
NEW QUESTION 165
For a reliability plan to be most effective, the reliability tasks should be integrated with which of the following plan?
Response:
- A. Reliability centered maintenance.
- B. Product distribution
- C. Product design and development.
- D. Product sales.
Answer: C
NEW QUESTION 166
A vendor must perform tests on parts to determine which of the following?
Response:
- A. Materials and processes.
- B. Cost.
- C. Configuration and size.
- D. Functional capability under specified environmental conditions.
Answer: D
NEW QUESTION 167
The rated breaking strength of a suspension bridge cable is 150,000 pounds. An example using this cable in a derated condition is which of the following?
Response:
- A. The cable in a 150,000 pound maximum stress application
- B. The cable in a 75,000 pound maximum stress application
- C. The cable as a parallel component.
- D. The cable in a 225,000 pound maximum stress application
Answer: B
NEW QUESTION 168
Which of the following statement is TRUE about environmental stress screening (ESS)?
Response:
- A. It is a form of accelerated testing.
- B. It stresses equipment beyond design limits
- C. It involves random sampling
- D. It is used to validate a design.
Answer: C
NEW QUESTION 169
A primary purpose of burn-in testing of parts is to
Response:
- A. Measure the temperature/stress distribution of parts.
- B. Ensure that parts are safe.
- C. Ensure that parts operate at elevated temperatures.
- D. Eliminate substandard parts.
Answer: D
NEW QUESTION 170
What is meant by "derating"?
I. The technique of using a part, component, or equipment under stress conditions considerably below rated values, to achieve a "reliability margin" in design.
II. The technique of using a part, component, or equipment under normal conditions to achieve a reliable product design.
III. The technique of using a part, component, or equipment below stress conditions to achieve a reliable product design.
Response:
- A. I, II and III
- B. III only
- C. I and III only
- D. I only
Answer: D
NEW QUESTION 171
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