Get New 2022 Valid Practice To your CRE Exam (Updated 265 Questions)
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NEW QUESTION 32
What is meant by catastrophic failure?
I. A gradual change in the operating characteristics of an item resulting in no loss of useful performance.
II. A sudden change in the operating characteristics of an item resulting in complete loss of useful performance.
III. A gradual change in the operating characteristics of an item resulting in complete loss of performance.
Response:
- A. II and III
- B. All of the above.
- C. I
- D. II
Answer: D
NEW QUESTION 33
In the bath curve model, which one of the sections represents the period when catastrophic failure are likely to occur?
Response:
- A. All periods.
- B. Wear out period.
- C. Constant failure rate period.
- D. Infant mortality
Answer: A
NEW QUESTION 34
The reliability of a device comprised of various parts functioning in series is the:
Response:
- A. Product of the unreliability
- B. Sum of the reliability.
- C. Sum of the probabilities of the unreliability.
- D. Product of the reliability.
Answer: D
NEW QUESTION 35
A system is turned off every 30 days for 5 minutes for on line maintenance. If the probability of system failure due to hardware failure is negligible, what is the system's unavailability?
Response:
- A. 0.0333
- B. 3.472 × 10 -4
- C. 1.157 × 10 -4
- D. 0.999
Answer: C
NEW QUESTION 36
Nonrelevant failures include all of the following EXCEPT:
Response:
- A. Mishandling failures
- B. Unverified failures.
- C. Operating adjustment failures.
- D. Human error failures.
Answer: B
NEW QUESTION 37
The investment in automated test equipment is often justified under which of the following circumstances Response:
- A. Traceable records are required.
- B. Repair times must be short.
- C. Numerous tests must be performed.
- D. Conformance records are required.
Answer: C
NEW QUESTION 38
Failure data are analyzed and a proportion of items survive to the end of the test. Data on these types of samples are referred as:
Response:
- A. Parameter data
- B. Control data
- C. Non-parameter data.
- D. Censored Data.
Answer: D
NEW QUESTION 39
A standard parts program is likely to have which of the following positive and negative effects?
Response:
- A. Option A
- B. Option C
- C. Option B
- D. Option D
Answer: D
NEW QUESTION 40
Pascal's triangle presents a simple means of determining which of the various terms of the binomial expansion?
Response:
- A. Exponents
- B. Coefficients
- C. Permutations
- D. Combinations
Answer: B
NEW QUESTION 41
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. Vehicle crash.
- B. Jammed transmission.
- C. Injured driver.
- D. Improper machining.
Answer: B
NEW QUESTION 42
Derating a component to 50 percent of its operating value will generally decrease its failure rate by a factor of:
Response:
- A. Greater than 10 percent but less than 30 percent.
- B. Less than 10 percent.
- C. Greater than 50 percent.
- D. Greater than 30 percent.
Answer: D
NEW QUESTION 43
A system is made up to several identical parts of varying age. The reliability of each of these parts is given by R( t) = e - λt where λ is the failure rate in failures per hour and t is the operating time in hours.
Which of the following is TRUE about the reliability of these parts?
Response:
- A. The failure rate of the system is given by the product of the individual part failure rates.
- B. Each of the parts has the same probability of failing during a given period of time.
- C. The oldest part is expected to fail first.
- D. The failure rate of the system is given by the product of the individual part reliabilities.
Answer: B
NEW QUESTION 44
Which of the following is an analytical approach used during the manufacturing process where process conditions are changed systematically for the purpose of determining modifications required for product improvement?
Response:
- A. Taguchi method.
- B. Fractional factorial experiment design
- C. Cause-and-effect analysis.
- D. Statistical process control.
Answer: D
NEW QUESTION 45
The equation below represents
Response:
- A. The limits for an X Bar control chart.
- B. The limits for a Range chart.
- C. The process capability adjusted for centering.
- D. The probability of meeting specification.
Answer: C
NEW QUESTION 46
The prediction technique has obviously not always been effective quantitatively. There is often a wide difference between actual reliability and predicted reliability. Nevertheless, the reliability prediction technique permits:
Response:
- A. Spotlighting what has gone wrong with the program.
- B. Indicating which department is to blame.
- C. Separating out "the vital few" from the "trivial many".
- D. Estimating how good the product really is.
Answer: C
NEW QUESTION 47
Reliability prediction is:
Response:
- A. A one time estimation process.
- B. A popular method as simulation theory.
- C. A continuous process starting with paper predictions.
- D. More important than reliability attained in the field.
Answer: C
NEW QUESTION 48
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. MTBF.
- B. Shape parameter.
- C. Average quality of the production lots.
- D. Expected life.
Answer: B
NEW QUESTION 49
In completing FMECA, it is important to treat each failure as
Response:
- A. An element of simultaneous event.
- B. An element of serial events.
- C. An element of multiple events
- D. A single event.
Answer: C
NEW QUESTION 50
Concurrent engineering means
Response:
- A. An electrical engineering term.
- B. Alternate designs being generated in parallel.
- C. Engineers working in tandem shifts to speed the process.
- D. Use of inputs from all technical disciplines early and simultaneously.
Answer: D
NEW QUESTION 51
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