CRE 무료 덤프문제 온라인 액세스

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 to operation. If the time of failure for the failed system were 4.4 moths, 6.3 months, and 10.7 months after placement in the field, what is the 90% lower confidence estimate on MTBF?
Response:

• A.33.7 months
• B.35.9 months
• C.4.1 months
• D.43.5 months

Product safety is a concern in today's environment. If a risk assessment is performed near the end of the design stage, consideration should be based on:
I. Hazard probability.
II. Hazard severity.
III. Risk impact.
IV. Cost impact.
Response:

• A.I only
• B.II and III only
• C.I, II, III and IV
• D.I, II and III only

In a FMECA, the potential failure modes are determined in order to improve system reliability. The effort to assess the severity of failure effects is part of the:
Response:

• A.Modeling determination.
• B.Criticality analysis.
• C.Risk analysis.
• D.Design potential.

What type of failure is usually reduced by periodic overhaul and replacement of component parts?
Response:

• A.Early life.
• B.Catastrophic.
• C.Random.
• D.Wear out.

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.0.5518
• B.0.5783
• C.0.4482
• D.0.8059