CRE Exam Questions
399 real CRE exam questions with expert-verified answers and explanations. Page 2 of 8.
- Question #51
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?
- Question #52
Data collection for a failure reporting, analysis, and corrective action system is important. The control of input data is BEST determined by:
- Question #53
Which answer mathematically expresses the reliability of an active parallel system in which all component reliabilities are unequal?
- Question #54
System and cost effectiveness analysis outputs:
- Question #55
Reliability objectives and requirements should be set in which of the following life cycle phases?
- Question #56
According to the Arrhenius Model, the expected life of an electronic component should:
- Question #57
Which of the following failures would probably be considered a chargeable reliability failure?
- Question #58
In the Taguchi design methodology, what are noise factors?
- Question #59
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 ?
- Question #60
The use of PERT requires:
- Question #61
Reliability Growth is:
- Question #62
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...
- Question #63
Which of the following is the reason the bathtub curve has an increasing failure rate during the wear-out period?
- Question #64
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
- Question #65
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...
- Question #66
The hazard function is:
- Question #67
The influence of FMEA on reliability is maximized at which of the following stages of development?
- Question #68
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...
- Question #69
A field test may be considered satisfactory if:
- Question #70
In the binomial expression:
- Question #71
The probability of an accident for the head event "H" given below is:
- Question #72
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...
- Question #73
All of the following are purposes of a production reliability assurance test (PRAT) EXCEPT
- Question #74
From a company's point of view, which of the following costs would be LEAST appropriate for determining the cost of reliability?
- Question #75
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?
- Question #76
In 4 flips of a coin the probability of two heads and two tails (in any order) is:
- Question #77
Which of following is NOT elements of risk priority number for FMEA?
- Question #78
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...
- Question #79
A primary purpose of burn-in testing of parts is to
- Question #80
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...
- Question #81
The techniques of design control are:
- Question #82
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.
- Question #83
The continuous improvement process can be guided by several techniques. Which of the following is the BEST approach?
- Question #84
The department having the authority to sign all deviations pertaining to the design of the product is normally:
- Question #85
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?
- Question #86
Which of the following is a primary concern for a reliability engineer who uses publicly available sources for mechanical part-failure rates?
- Question #87
Which answer correctly describes the experimental design on the left?
- Question #88
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:
- Question #89
The proper software tool for software development projects can help reduce test time. The software tools used to measure internal test coverage are called.
- Question #90
Which of the following statements is TRUE about human factor points?
- Question #91
System-safety analytical techniques include all EXCEPT:
- Question #92
Design plans are BEST developed for product reliability with significant input from which of the following?
- Question #93
Maintenance times on simple with straightforward repair will fit which of the following distributions?
- Question #94
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?
- Question #95
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:
- Question #96
A key distinction between Taguchi designed experiments and classical designed experiments is that Taguchi designs
- Question #97
To achieve 96 percent reliability at a 90 percent confidence level:
- Question #98
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...
- Question #99
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?
- Question #100
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...