[2021] Pass CRE Exam - Real Questions & Answers
CRE Exam Questions Get Updated [2021] with Correct Answers
NEW QUESTION 22
What is the minimum number of failure free trips that one must make in their car to be at least 95% confident it is 95% reliable?
Response:
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION 23
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 24
What are the life cycle costs for a new stamping machine purchased by a metal fabrication plant?
Pertinent cost data follows:
Purchase Price = $230,000
Repair Costs = $107,000
Post Purchase Costs = $870,000
Start Up Costs = $125,000
Maintenance Costs = $420,000
Energy Costs = $325,000
Response:
- A. $2,077,000
- B. $1,100,000
- C. $787,000
- D. $1,207,000
Answer: B
NEW QUESTION 25
A satellite has two redundant control systems, each has a failure rate (lambda) = 1×10 -6 failures/hour. If one of the systems fails, the failure rate for the remaining system increases to 2×10 -5 failures/hour.
What is the reliability of the redundant control systems at 175,000 hours?
Response:
- A. 0.8609
- B. 0.690
- C. 0.7796
- D. 0.2507
Answer: C
NEW QUESTION 26
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 27
In completing FMECA, it is important to treat each failure as
Response:
- A. An element of multiple events
- B. An element of simultaneous event.
- C. An element of serial events.
- D. A single event.
Answer: A
NEW QUESTION 28
Which of the following calculation is used to determine the overall tolerance for the serial combination of the component?
Response:
- A. The sum of the tolerances
- B. The maximum of the tolerances.
- C. The square root of the sum of the square of the tolerance.
- D. The average of the tolerances.
Answer: C
NEW QUESTION 29
The variations which the normal distribution curve describes are due to:
Response:
- A. Degradation failure.
- B. Non assignable causes.
- C. Catastrophic failure
- D. Assignable causes
Answer: B
NEW QUESTION 30
A small sample from a product population is subjected to multiple levels of elevated stress. Which of the following could be used to model the life of the product?
Response:
- A. Poisson process.
- B. Pareto rule.
- C. Inverse power law.
- D. Pascal expansion.
Answer: C
NEW QUESTION 31
An intelligent and good reliability program plan is one that:
Response:
- A. Defines in detail the complementary activities necessary for improving and assessing the reliability parameter.
- B. Delineates the responsibilities and interfaces in as general a manner as possible.
- C. Retains flexibility by not formalizing reliability activities so that it cannot be tied down contractually.
- D. Emphasize the planning activities over the control activities.
Answer: A
NEW QUESTION 32
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 33
Which of the following is the main advantage of a step stress test?
Response:
- A. It guarantees accurate estimates
- B. It yields failure quickly
- C. It runs at constant stress
- D. It segregate discrepant hardware
Answer: B
NEW QUESTION 34
Which of the following forms of reliability data will BEST provide valuable information on product usage and reliability?
Response:
- A. Field support data
- B. In-house test results
- C. Independent lab results.
- D. Quality control data.
Answer: A
NEW QUESTION 35
Weibull analysis is a way to quickly and easily analyze field data or interval test data. The limits of the use of this technique include having a good estimate for the:
Response:
- A. Expected life.
- B. Shape parameter.
- C. MTBF.
- D. Average quality of the production lots.
Answer: B
NEW QUESTION 36
Which of the following graphs represents a product that is a good candidate for an accelerated degradation test involving overstress testing?
Response:
- A. Option C
- B. Option A
- C. Option B
- D. Option D
Answer: B
NEW QUESTION 37
In an elevated-temperature test on an electronic system, which of the following models is used to calculate the acceleration factor?
Response:
- A. Inverse power law model.
- B. Arrhenius model.
- C. Exponential model.
- D. Lognormal model.
Answer: B
NEW QUESTION 38
Random sampling plans are based on which of the following assumption?
Response:
- A. A specific dependency model has been selected.
- B. The data are accurate.
- C. The process is unstable.
- D. Every item has an equal chance of being selected.
Answer: D
NEW QUESTION 39
Which of the following is NOT an objective of a data collection program?
Response:
- A. To produce reliability reports.
- B. To demonstrate internal reliability.
- C. To validate vendor supplied items.
- D. To demonstrate reliability to customers.
Answer: A
NEW QUESTION 40
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