Preventive maintenance programs are MOST effective when
Response:

• A.The hazard rate is increasing.
• B.Random failure occur
• C.The hazard rate is decreasing.
• D.The hazard rate is constant.

Comment: *

Name: *

Email: *

Verification: *

When a large number of components have been tested for a fixed time with no failure then:
Response:

• A.The failure rate is equivalent to the sum of the individual test times.
• B.The Laplace rule of succession will apply.
• C.The failure rate is indeterminable.
• D.The failure rate is at least an individual test time.

Comment: *

Name: *

Email: *

Verification: *

All of the following statements are TRUE about confidence interval EXCEPT Response:

• A.A larger sample size would yield a smaller width
• B.The width does not depend on the confidence level.
• C.The width indicate the uncertainty in estimates.
• D.A smaller sample size would yield a larger width

Comment: *

Name: *

Email: *

Verification: *

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:

• A.Identify the field service personnel who handled the returns.
• B.Determine the location in which the failure occurred.
• C.Categorize the data by using a Pareto analysis.
• D.Find the median of the data set.

Comment: *

Name: *

Email: *

Verification: *

In 4 flips of a coin the probability of two heads and two tails (in any order) is:
Response:

• A.9/16
• B.3/8
• C.1/2
• D.7/16

Comment: *

Name: *

Email: *

Verification: *