CRE 무료 덤프문제 온라인 액세스

15 rocket booster engines were tested for a total of 5 hours. Three engines failed. What is the two-sided confidence interval for MTBF using 95% confidence?
Response:

• A.0.69, 8.06
• B.0.80, 9.50
• C.0.75, 9.20
• D.0.57, 8.06

Measures of availability include:
I. Effectiveness.
II. Inherent.
III. Achieved.
IV. Dependability.
V. Capability.
Response:

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

In general, reliability testing is performed for which of the following reasons?
I. To detect unanticipated failure modes.
II. To compare estimated failure rates to actual failure rates.
III. To monitor reliability growth over time.
IV. To meet or exceed customer expectations.
Response:

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

According to the Arrhenius Model, the expected life of an electronic component should:
Response:

• A.Increase exponentially with an increase in temperature.
• B.Decrease exponentially with an increase in temperature.
• C.Increase linearly with an increase in temperature.
• D.Decrease linearly with an increase in temperature.

When performing trade-offs in evaluating parts for reliability, which of the following is LEAST important?
Response:

• A.Process and materials compatibility.
• B.Initial parts costs.
• C.Technical comparison of new part with standard part type.
• D.Search of data part history to established reliability potential.