CRE Exam Questions

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?

Data collection for a failure reporting, analysis, and corrective action system is important. The control of input data is BEST determined by:

Which answer mathematically expresses the reliability of an active parallel system in which all component reliabilities are unequal?

System and cost effectiveness analysis outputs:

Reliability objectives and requirements should be set in which of the following life cycle phases?

According to the Arrhenius Model, the expected life of an electronic component should:

Which of the following failures would probably be considered a chargeable reliability failure?

In the Taguchi design methodology, what are noise factors?

A reliability test of 12 pumps is terminated at 1000 hours. There were 5 failures as follows, what is the median rank % for the 4th failure ?

The use of PERT requires:

Reliability Growth is:

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 mo...

Which of the following is the reason the bathtub curve has an increasing failure rate during the wear-out period?

What is the reliability of this system? Where component reliabilities, A = 0.80 B = 0.95 C = 0.82 D = 0.85 E = 0.75

50 resisters from a lot of 75,000 were tested. The average was 3,306 ohms with a variance of 21,609 ohm 2 . From this information, we may conclude with 99% confidence, that at leas...

The hazard function is:

The influence of FMEA on reliability is maximized at which of the following stages of development?

Your customer required a paper cutting machine with these specifications: Speed : 100m/minute; Cutting width : 47 inches; Good product : 99% You deliver a machine to this customer...

A field test may be considered satisfactory if:

In the binomial expression:

The probability of an accident for the head event "H" given below is:

Which of the following is an analytical approach used during the manufacturing process where process conditions are changed systematically for the purpose of determining modificati...

All of the following are purposes of a production reliability assurance test (PRAT) EXCEPT

From a company's point of view, which of the following costs would be LEAST appropriate for determining the cost of reliability?

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?

In 4 flips of a coin the probability of two heads and two tails (in any order) is:

Which of following is NOT elements of risk priority number for FMEA?

What is the reliability of the power switching system schematic on the left after 30,000 hours ? The electric utility primary power system (A) has a failure rate of 0.00001 failure...

A primary purpose of burn-in testing of parts is to

Develop the fault tree analysis for a candy dispensing machine. There are two contributing subsystems, both of them must fail for the system to fail. The electronic release has Pf...

The techniques of design control are:

What is this system`s reliability at 3000 hours? MTBFs for the components are : A = 2500 hours B = 3700 hours C = 2000 hours D = 4000 hours.

The continuous improvement process can be guided by several techniques. Which of the following is the BEST approach?

The department having the authority to sign all deviations pertaining to the design of the product is normally:

Given mean-time-to-failure of 200 hours for each of two components, what is the probability of system failure if both components operate in parallel for one hour?

Which of the following is a primary concern for a reliability engineer who uses publicly available sources for mechanical part-failure rates?

Which answer correctly describes the experimental design on the left?

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:

The proper software tool for software development projects can help reduce test time. The software tools used to measure internal test coverage are called.

Which of the following statements is TRUE about human factor points?

System-safety analytical techniques include all EXCEPT:

Design plans are BEST developed for product reliability with significant input from which of the following?

Maintenance times on simple with straightforward repair will fit which of the following distributions?

What is the failure rate of a system composed of three components, each of which can cause a system failure, and which have the following information?

Failure occur on a system at 75, 79, 83, 85 hours. Assuming normality, one sided and unbiased the lower tolerance limit for 95% reliability with 90% confidence for this sample is:

A key distinction between Taguchi designed experiments and classical designed experiments is that Taguchi designs

To achieve 96 percent reliability at a 90 percent confidence level:

In a certain application, two identical transducers are used to measure the vacuum in a system. The system is considered to have failed if either of the vacuums read by the transdu...

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?

Laboratory tests of a new polymer prototype yielded the following proportions of a critical compound: 4.2 ppm, 4.1 ppm, 4.7 ppm, 4.9 ppm, 5.3 ppm What is the sample standard deviat...