CRE Exam Questions

What are key elements of a Failure Reporting, Analysis, and Corrective Action System (FRACAS)? (Choose three)

Why is it important to identify the consequences of failure modes when establishing reliability acceptance criteria?

How should environmental conditions be incorporated into a test plan to ensure accurate reliability testing?

In stress-strength analysis, what does the area where the stress distribution overlaps the strength distribution represent?

Why is standardization important in parts selection for system development?

Which of the following best describes Environmental Stress Screening (ESS)?

Which of the following are advantages of using Commercial Off-The-Shelf (COTS) components? (Choose Two)

A go/no-go device is tested until it fails. If X is the number of tests to first failure with no wear out present, and the probability of success on each test is .99, then the prob...

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?

Which of the following is the GREATEST benefit of a fault-tree analysis?

The first phase in the operation life history of a population of product units is typically called:

In the area of risk assessment, hazard severity categories are used to provide a measure of the seriousness involved. A system failure causing major environmental damage would be c...

Which of the following activities is MOST effective in increasing reliability during a product's life cycle?

Which of the following is a model used for monitoring reliability growth?

For a reliability plan to be most effective, the reliability tasks should be integrated with which of the following plan?

A data collection, analysis, and reporting system should:

A 2 level 5 factor experiment is being conducted to optimize the reliability of an electronic control module. A half replicate of the standard full factorial experiment is proposed...

Human factors in product safety planning are assessed for which of the following reasons?

Derating a component to 50 percent of its operating value will generally decrease its failure rate by a factor of:

Which of the following should be avoided in parts selection to enhance the design reliability?

The term "failure mode" is defined as the:

Which of the following tools are classified as structured root cause analysis tools?

A systematic approach to analyze fault trees requires all of the following EXCEPT

Looking at systems in terms of (1) a series-parallel functional configuration, (2) using a truth table approach, or (3) performing a Monte-Carlo simulation are techniques for:

If a component has a known constant failure rate of 0.0037 failures per hour ; the reliability of two of these components in a series alignment would be:

Root cause failure analysis is necessary to identify and correct basis problems. Usually a priority of failure mode is established. This classic or traditional approach to improvem...

The reliability goal for a complex system is 0.995. The predicted reliability for the system is 0.999 when one of the subsystems is functioning and 0.90 when that subsystem is not...

There is a subtle difference between a standard parts program and a standardization program. A standardization program tends to emphasize:

Preventive maintenance time includes:

Which of the following is the MOST effective technique for prioritizing critical factors for problem- solving?

Availability of a system is roughly the:

Consider the four normal stress and strength distributions described below. Which component would have the highest reliability?

Design review should be a process to ensure and/or develop more reliable design. Which of the following person(s), if any, should work with the designer during the design process?

Random sampling plans are based on which of the following assumption?

Product reliability concerns the relationship of product function to:

Which answer BEST describes the events and operating conditions an item experiences from mission initiation to completion? The events may include the research and development phase...

A certain light switch fails with a failure rate of 10 -4 . If the switch is used 20 times per week, what is the probability of the switch failing by the end of 3-year period?

Field data for 20 mechanical suspension systems showed 3 failure during the 12 month warranty period. When failure occurred they were repair within 2 days and the system returned t...

In a software development project, which of the following elements is NOT essential to ensure a reliable product?

Arrange the following failure data steps into the correct sequence from start to finish.

What percentage of the material is expected to fail?

For a high compression aircraft air conditioning system, the MTBF is 100 hours. This mean life is allocated for four serial units comprising the total system. The unit failure rate...

A vendor must perform tests on parts to determine which of the following?

Which of these terms is commonly used as the probability of rejecting material produced at an unacceptable quality level?

Production error by human operators may be caused by:

A highly accelerated stress screening (HASS) test can help to detect and separate units with manufacturing defects. HASS test limits are typically developed from:

Which of the following is NOT considered good practice in reliability design?

A qualification test is used to determine that design and selected production methods will yield a product that conforms to specification. An acceptance test is used to determine t...

When assessing failures during a reliability test program, which of the following should a reliability engineer consider first?