CRE Exam Questions

The comparative financial effects of reliability over the designed operating time T of two systems built to perform the same function can be obtained by comparing the

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...

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...

All of the following Boolean algebra expression is incorrect EXCEPT?

Human reliability is defined as the probability that a human will:

According to Taguchi, robustly designed experiments should employ all of the following techniques EXCEPT

Which answer describes the MOST significant difference that Reliability Engineering has, compared to the Quality Profession?

The prediction technique has obviously not always been effective quantitatively. There is often a wide difference between actual reliability and predicted reliability. Nevertheless...

In a design team environment, the reliability function can influence product reliability principally by:

A company has produced a new module. The failure data on 40 returns are shown below. If the time to failure follows a normal distribution, what is the probability that time to fail...

Specifically, up-time ratio is a measure of:

The equation below represents

The use of plug-in devices improves all of the following EXCEPT:

A series system whose reliability at 5 hours is 0.80, has three components with these historical constant failure rates: 1 = failure rate for component 1 = 0.04 failures/hour 2 = f...

Which of the following statement is TRUE about environmental stress screening (ESS)?

Your company has just installed a new computer data entry system and you must determine the new input error rates. Management requires you to report the error rate within 0.5%, at...

Which of the following are the MOST desirable basic skills required of a reliability engineer assigned to a cross-functional product team?

One method of evaluating the design reliability is to analyze the design assuming the worst case. Which of the following techniques is NOT applicable for worst case analysis?

You have written what you feel is an excellent book on reliability principles. Your company wants you to conduct company-wide training classes on a specific reliability topic. Your...

The reliability growth factor is MOST important to consider in which of the following situation?

Which of the following is a key element of an effective reliability growth program?

Which of the following is NOT a major consideration in performing a human factors analysis?

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" cond...

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 unavail...

Which of the following can be used to determine the MTTR?

Preliminary hazard analysis:

The use of PERT requires:

A resistor is rated at 1 watt. One example of using this resistor in a derated condition is using:

The design function which assigns probability of failures between components or subsystems is called:

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:

A full factorial design of experiments has four factors. The first factor has two levels, the second factor has three levels, the third factor has two levels, and the final factor...

For equal length missions an increase in the MTBF will yield:

The BEST way to set an overall reliability goal is to:

Which of the following is the primary goal of accelerated testing?

What is the factor of safety for the material?

The means of large samples from a population tend to be normally distributed around the population mean. This statement is TRUE according to which of the following theorems?

Which of the following is NOT an appropriate element in the definition of availability?

When parts are selected for a product in development, which of the following key elements should be considered first?

In which of the following distribution is the standard deviation equal to the mean?

Failure data collection, analysis, and corrective action:

Failure rate is calculated as a:

The general public is willing to accept some risks in their work environment. A study has indicated that an accident fatality at which of the following levels is NOT of great conce...

In completing FMECA, it is important to treat each failure as

For the ANOVA Table below, what is the Fcal statistic?

For a corrective action system to be effective, which of the following is MOST important?

The failure rate for an IC chip is 0.0023 per hour of operation. Calculate the MTBF given that the failure rate is constant.

A sample is split into subgroups. Testing for each subgroup is stopped after the first failure in that subgroup. The times to first failure are plotted and the distribution paramet...

Combined environmental reliability testing allows for a:

Nonrelevant failures include all of the following EXCEPT:

Which of the following is the MOST appropriate reason for selecting accelerated life testing for an expensive product to determine adherence to design requirements?