CRE Pre-Exam Practice Tests (Updated 265 Questions) [Q73-Q97]

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CRE Pre-Exam Practice Tests | (Updated 265 Questions)

Valid CRE Exam Q&A PDF – One Year Free Update

NO.73 To achieve 96 percent reliability at a 90 percent confidence level:
Response:

Units must be redundant.

100 units with one failure is required

25 units with no failures is required.

20 units with no failures is required.

NO.74 QFD stand for
Response:

Quality Function Deployment.

Qualification of Preliminary Design.

Quantitative Functional Development.

Quality Focused Department.

NO.75 Arrange the following failure data steps into the correct sequence from start to finish.
I. Verify the failure.
II. Identify and control the failure.
III. Investigate the failure.
IV. Provide corrective action and follow up.
V. Report the fail.
Response:

II, V, I, III, IV

I, II, V, III, IV

III, II, V, I, IV

I, II, III, IV, V

NO.76 Which answer correctly describes the experimental design on the left?

Response:

Greaeco-Latin Square.

Latin Square.

Randomezed Complete Block

Youden Square.

NO.77 All of the following statements are TRUE about confidence interval EXCEPT Response:

A larger sample size would yield a smaller width

A smaller sample size would yield a larger width

The width indicate the uncertainty in estimates.

The width does not depend on the confidence level.

NO.78 The techniques of design control are:
Response:

Unique to the aerospace industry.

Too expensive for general application.

Applicable generally throughout industry.

Limited to hardware-manufacturing enterprises.

NO.79 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 advice is sought and you recommend your text because you are familiar with it. What other professional action should be immediately taken?
Response:

Be modest and nonassuming when explaining your work.

Recommend the work of another author to avoid the appearance of impropriety.

Inform your employer of your business connection to the book.

If the book is commercially available and your royalty is small, no other action is required.

NO.80 Which of the following FTA statements is NOT true?
Response:

It provides corrective actions for component failures.

It includes common mode failure effects.

It indicates the critical path from system failure to component failure.

It illustrates the overall system behavior.

NO.81 Reliability Growth is:
I. Often mathematically modeled with the Duane or AMSSA approaches.
II. The existence of more than one means for accomplishing a given functions.
III. Improvement of a reliability parameter by correcting deficiencies in the design.
Response:

I and II only

II only

III only

I and III only

NO.82 Which of the following is NOT an appropriate element in the definition of availability?
Response:

The degree to which the system is in an operable and committable state at the start of a mission.

The probability the system will perform its mission when required.

The ratio of the actual operating time to the scheduled operating time excluding PM.

The measure of the ability of a system to achieve mission objectives given the conditions during the mission.

NO.83 Reliability prediction is:
Response:

A one time estimation process.

A continuous process starting with paper predictions.

More important than reliability attained in the field.

A popular method as simulation theory.

NO.84 Which of the following activities is MOST effective in increasing reliability during a product’s life cycle?
Response:

Improving gage repeatability and reproducibility

Developing an aggressive testing strategy.

Developing capable processes.

Developing robust design.

NO.85 From a company’s point of view, which of the following costs would be LEAST appropriate for determining the cost of reliability?
Response:

Warranty cost.

Reliability training

Life testing.

Equipment depreciation.

NO.86 For a reliability plan to be most effective, the reliability tasks should be integrated with which of the following plan?
Response:

Reliability centered maintenance.

Product sales.

Product distribution

Product design and development.

NO.87 Which answer mathematically expresses the reliability of an active parallel system in which all component reliabilities are unequal?

Response:

Rs = RaRbRc – (RaRb + RbRc + RaRc) + (Ra + Rb + Rc)

Rs = [RaRbRc] / [Ra + Rb + Rc]

Rs = Ra + Rb + Rc – RaRbRc

Rs = [RaRbRc + RaRb + RbRc + RaRc ] / [Ra + Rb + Rc]

NO.88 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:

II and III

All of the above.

NO.89 A company has produced a new module. The failure data on 40 returns are shown below.

Which of the following is the first step in the review of this situation ?
Response:

Find the median of the data set.

Categorize the data by using a Pareto analysis.

Determine the location in which the failure occurred.

Identify the field service personnel who handled the returns.

NO.90 A system is defined by the following reliability block diagram.

Which of the following block diagrams MOST simply represents the system reliability when Unit C is functioning?

Response:

option A

option B

option C

option D

NO.91 In completing FMECA, it is important to treat each failure as
Response:

A single event.

An element of multiple events

An element of simultaneous event.

An element of serial events.

NO.92 Consider the four normal stress and strength distributions described below. Which component would have the highest reliability?
Response:

The average and standard deviation of the stress distribution are both higher than for the strength curve.

The average and standard deviation of the stress and strength distributions are the same.

Both distributions have the same standard deviation but the strength average is higher than the stress average.

Both distributions have the same variance but the stress average is slightly higher than the strength average.

NO.93 The two principal measures of failure during risk assessment are which of the following?
Response:

Failure severity and failure probability.

Failure analysis and failure effects.

Failure method and failure mode.

Failure mode and failure mechanism.

NO.94 When a bathtub curve is used, one characteristic of the flat center portion of the curve is that during this period Response:

There can be only one type of failure in the system.

The reliability of the system can be expressed as an exponential function

The equipment can be considered highly reliable.

The time of the next failure is predictable from the time of the last failure.

NO.95 The reliability parameter is one of the system performance parameters with significant influence on:
Response:

Capability

Transfer functions.

Availability and dependability.

Hostile man-made environments

NO.96 A randomly failing component is tested to r failures, and n observations are made. Degrees of freedom for calculating confidence limits on the mean should be:
Response:

2r + 2

n – 1

NO.97 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 failure exceeds 20 hours ?
Response:

0.028

0.050

0.950

0.972

Certified Reliability Engineer (CRE) Free Update Certification Sample Questions: https://www.testsimulate.com/CRE-study-materials.html

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