Get 100% Passing Success With True CRE Exam! [Sep-2021]
ASQ CRE PDF Questions - Exceptional Practice To Certified Reliability Engineer (CRE)
NEW QUESTION 99
Which of the following statements is TRUE about probability distributions?
Response:
- A. The variance is used to measure the central tendency
- B. The 3rd moment about the mean is used to measure the kurtosis
- C. 4th moment about the mean is used to measure the skewness
- D. The median is used to measure the central tendency
Answer: D
NEW QUESTION 100
If the plating time of a tube increases as the inside diameter decreases, then the correlation coefficient for the insider diameter versus plating time would be:
Response:
- A. Equal to 1
- B. Greater than 1
- C. Between 0 and +1
- D. Between 0 and -1
Answer: D
NEW QUESTION 101
Highly repetitive operations should be assigned to:
Response:
- A. A machine.
- B. An operator.
- C. A machine and operator performing the same task alternately.
- D. An operator assisted by a computer.
Answer: A
NEW QUESTION 102
Which of the following techniques is NOT used when derating parts to enhance their overall reliability?
Response:
- A. Derating for temperature.
- B. Lower power dissipation.
- C. Use of 100% rating.
- D. Derating for stress.
Answer: C
NEW QUESTION 103
Product reliability concerns the relationship of product function to:
Response:
- A. Time.
- B. Customer demands.
- C. Cost.
- D. Design.
Answer: A
NEW QUESTION 104
When requesting "worst case" design analysis, you expect the reliability group to:
Response:
- A. Analyze the worst rejects.
- B. Determine whether product requirements can be met with subassemblies assumed at their worst combination of tolerances.
- C. Analyze only those products failing to meet specification requirements.
- D. Assume all subassembly tolerances are at their maximum limit.
Answer: B
NEW QUESTION 105
For single-failure modes, the probability plotting methods used to derive time-to-failure distribution parameters are applicable only when the data are Response:
- A. Gathered for repairable systems.
- B. Exponentially distributed.
- C. Independently and identically distributed.
- D. Independently and normally distributed.
Answer: C
NEW QUESTION 106
Equivalence class partitioning is:
Response:
- A. A black-box method that divides the inputs to a program into classes from which test cases can be derived.
- B. A black-box method that divides program functions into related groups for testing.
- C. A white-box method that divides errors into classes to reduce the amount of testing required.
- D. A white-box method that divides control paths into dependent and independent categories for testing.
Answer: A
NEW QUESTION 107
In an analysis of variance, which of the following distributions is the basis for determining whether the variance estimates are all from the same population?
Response:
- A. Chi square.
- B. F
- C. Student's t
- D. Normal
Answer: B
NEW QUESTION 108
When testing is establish failure rate data and reliability predictions, which of the following is NOT normally a feasible acceleration factor with respect to rated conditions?
Response:
- A. Greater humidity.
- B. Higher temperature.
- C. Longer time.
- D. Higher voltage.
Answer: C
NEW QUESTION 109
Which of these terms is commonly used as the probability of rejecting material produced at an unacceptable quality level?
Response:
- A. β only
- B. 1 - α only
- C. α only
- D. 1 - β only
Answer: D
NEW QUESTION 110
To which of the following types of systems is the concept mean-time-between-failures LEAST applicable?
Response:
- A. Radar set.
- B. Automobile.
- C. Rocket motor.
- D. Power generator.
Answer: C
NEW QUESTION 111
Consider the four normal stress and strength distributions described below. Which component would have the highest reliability?
Response:
- A. The average and standard deviation of the stress distribution are both higher than for the strength curve.
- B. Both distributions have the same standard deviation but the strength average is higher than the stress average.
- C. Both distributions have the same variance but the stress average is slightly higher than the strength average.
- D. The average and standard deviation of the stress and strength distributions are the same.
Answer: B
NEW QUESTION 112
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. I, II, III and IV
- B. I, II and III only
- C. II and IV only
- D. I, II and IV only
Answer: A
NEW QUESTION 113
Which mathematical method provides a solution, has a time dimension and is solved numerically?
Response:
- A. Analytic solution.
- B. None of the above.
- C. Strength and stress model.
- D. Simulation model.
Answer: D
NEW QUESTION 114
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 75,000 pound maximum stress application
- B. The cable in a 150,000 pound maximum stress application
- C. The cable as a parallel component.
- D. The cable in a 225,000 pound maximum stress application
Answer: A
NEW QUESTION 115
Fifteen(15) motors were tested for a total of 1,200 cumulative hours, with four failure occuring. The test was then failure-truncated. If the failure rate is assumed to be constant, what is the 95% lower confidence limit of MTBF?
Response:
- A. 609 hours
- B. 131 hours.
- C. 155 hours.
- D. 876 hours.
Answer: C
NEW QUESTION 116
Measures of availability include:
I. Effectiveness.
II. Inherent.
III. Achieved.
IV. Dependability.
V. Capability.
Response:
- A. I, III and IV
- B. II and III only
- C. III, IV and V
- D. II, III and IV
Answer: B
NEW QUESTION 117
Derating a component to 50 percent of its operating value will generally decrease its failure rate by a factor of:
Response:
- A. Less than 10 percent.
- B. Greater than 10 percent but less than 30 percent.
- C. Greater than 50 percent.
- D. Greater than 30 percent.
Answer: D
NEW QUESTION 118
A field test may be considered satisfactory if:
Response:
- A. Alternate operators can operate the equipment under all required conditions.
- B. The human factors engineers 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: A
NEW QUESTION 119
A qualification test is used to determine that design and selected production methods will yield a product that conforms to specification.
An acceptance test is used to determine that a completed product conforms to design. On this basis, a destructive test can be used for:
Response:
- A. Neither qualification nor acceptance.
- B. Acceptance only.
- C. Qualification or acceptance.
- D. Qualification only.
Answer: C
NEW QUESTION 120
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. Censored Data.
- B. Parameter data
- C. Control data
- D. Non-parameter data.
Answer: A
NEW QUESTION 121
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