Updated Sep-2021 Test Engine to Practice Test for CRE Exam Questions and Answers!
Certified Reliability Engineer (CRE) Certification Sample Questions and Practice Exam
NEW QUESTION 127
The BEST way to set an overall reliability goal is to:
Response:
- A. Write a specification calling for a product to have high reliability and incorporate it into a contract.
- B. Insist that the goal be expressed in terms of mean-time-between-failures for all components and assemblies.
- C. Put down specific numerical requirements for reliability statements of operating environments, and a definition of successful product performance.
- D. Indicate who would be at fault if the desired reliability is not obtained during the warranty.
Answer: C
NEW QUESTION 128
Product safety standards do NOT include:
Response:
- A. Requirements for general, equipment and component safety.
- B. Performance requirements for products.
- C. Product requirements laws passed by government
- D. Evaluation requirements for product safety testing.
Answer: B
NEW QUESTION 129
For complex electronics systems, the major contributor to repair time is generally:
Response:
- A. Remove/replace.
- B. Disassembly/reassembly.
- C. Diagnosis.
- D. Final checkout.
Answer: C
NEW QUESTION 130
In the binomial expression:
Response:
- A. The sum of the exponents of each term after expansion is equal to the sample size.
- B. The sum of the coefficients of each term after expansion is equal to the sample size.
- C. The sum of the exponents after expansion has no relation to the sample size.
- D. The sum of the exponents of all the terms after expansion is equal to the sample size.
Answer: A
NEW QUESTION 131
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 132
A plastics plant operates 8 extruders producing plastic film. Production volume requirements cannot be met if less than 6 extruders are operating. There is a .30 probability that a machine stopping malfunction will occur.
What is the probability that 6 extruders can remain operating throughout the day?
Response:
- A. 0.5783
- B. 0.5518
- C. 0.4482
- D. 0.8059
Answer: B
NEW QUESTION 133
The main purpose of environmental stress screening is which of the following?
Response:
- A. To eliminate supplier inspections.
- B. To subject parts to extremes
- C. To eliminate infant mortality failures.
- D. To assist in the selection of standardized parts.
Answer: C
NEW QUESTION 134
Combined environmental reliability testing allows for a:
Response:
- A. Range of test conditions in excess of design tolerances
- B. Use of a common acceleration factor for relative MTTF from its accelerated condition to its normal condition
- C. Method for certification of test results.
- D. Multiple stress test
Answer: D
NEW QUESTION 135
Who should be chairperson of a design review committee?
Response:
- A. A senior member of management.
- B. The chief designer.
- C. The person best able to make decisions on a design.
- D. The reliability engineer.
Answer: C
NEW QUESTION 136
What is the MOST accurate method to verify that the maintainability requirement of a design is being met?
Response:
- A. By demonstration at the customer's facility.
- B. By analysis of the design.
- C. By thorough design reviews.
- D. By performing maintainability prediction.
Answer: A
NEW QUESTION 137
Specifications are written on parts to:
I. Enable procurement to buy usable parts.
II. Establish mechanical, functional, environmental and reliability requirements.
III. Provide inspection criteria.
Response:
- A. I
- B. All of the above.
- C. II
- D. I and II
Answer: B
NEW QUESTION 138
The probability of an accident for the head event "H" given below is:
Response:
- A. 0.1100.
- B. 0.1125.
- C. 0.0700.
- D. 0.0689.
Answer: D
NEW QUESTION 139
What is the MOST vital information to know about a system in order to perform a hardware FMECA?
Response:
- A. Full process information.
- B. The details of the system.
- C. The details of the system.
- D. The details of the subsystems.
Answer: C
NEW QUESTION 140
Which of the following is NOT considered good practice in reliability design?
Response:
- A. Using failure mode and effects analysis (FMEA).
- B. Using series design.
- C. Simplifying item configuration.
- D. Using proven parts.
Answer: B
NEW QUESTION 141
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 142
Regarding computer hardware and software reliability, which of the available answers would NOT enhance software reliability?
I. Structured programming.
II. Redundant code programming.
III. Modular programming.
IV. Programming for fault tolerance.
Response:
- A. I and III only
- B. All of the options will enhance software reliability
- C. II only
- D. II and IV only
Answer: C
NEW QUESTION 143
The variations which the normal distribution curve describes are due to:
Response:
- A. Assignable causes
- B. Degradation failure.
- C. Catastrophic failure
- D. Non assignable causes.
Answer: D
NEW QUESTION 144
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 145
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 with these specifications :
Speed : 110m/minute; Cutting width : 48 inches; Good product: 97%.
How would you classify this success/failure ?
Response:
- A. None of the above.
- B. A technical failure.
- C. A limited success
- D. A technical success, but quality failure.
Answer: B
NEW QUESTION 146
A primary purpose of burn-in testing of parts is to
Response:
- A. Measure the temperature/stress distribution of parts.
- B. Ensure that parts are safe.
- C. Ensure that parts operate at elevated temperatures.
- D. Eliminate substandard parts.
Answer: D
NEW QUESTION 147
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?
Response:
- A. 0.00192 f/hr
- B. 0.00913 f/hr.
- C. 0.00258 f/hr.
- D. 0.00671 f/hr
Answer: C
NEW QUESTION 148
For a reliability plan to be most effective, the reliability tasks should be integrated with which of the following plan?
Response:
- A. Product design and development.
- B. Product sales.
- C. Reliability centered maintenance.
- D. Product distribution
Answer: A
NEW QUESTION 149
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" condition, and that finding is reported to management.
Due to a pending multimillion dollar order, management requests that a line be drawn to show growth where none actually exists. The engineer's department manager directs the engineer to comply with management request.
The system is released without improvements and the company receives the multimillion dollar order from an external customer. The customer then requests evidence of the reliability growth. Which of the following actions by the engineer would be MOST appropriat?
Response:
- A. Arrange a meeting with the department manager and upper management to discuss the reliability report.
- B. Arrange a meeting with the customer and discuss all past occurrences
- C. Ask the department manager to respond to the customer's request.
- D. Revisit the original data and project artificial reliability growth to satisfy the customer's request.
Answer: A
NEW QUESTION 150
What is the general use of an R chart?
Response:
- A. To determine the variance of the process.
- B. To determine if the process mean is in control.
- C. To determine if the process is in control.
- D. To determine if the process variance is in control.
Answer: D
NEW QUESTION 151
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