Question 1

Which of the following increases as repairs move from the maintenance department to the depot service?

Accepted Answer

A) cost 
B) replacement time 
C) competence 
D) operator ownership 
E) A,B,and C 
A) cost 
B) replacement time 
C) competence 
D) operator ownership 
E) A,B,and C

Question 2

An optimal maintenance policy strikes a balance between the costs of breakdown and preventive maintenance so that the total cost of maintenance is at a minimum.

Accepted Answer

A) True 
 B)False

Question 3

How is MTBF related to FR(N)?

Accepted Answer

A) MTBF is measured in hours,while FR(N)is measured in years. 
B) MTBF is normally distributed,with FR(%)as its mean and FR(N)as its standard deviation. 
C) MTBF is the reciprocal of FR(N). 
D) Both MTBF and FR(N)increase when breakdown maintenance is replaced by preventive maintenance. 
E) MTBF and FR(N)are unrelated concepts. 
A) MTBF is measured in hours,while FR(N)is measured in years. 
B) MTBF is normally distributed,with FR(%)as its mean and FR(N)as its standard deviation. 
C) MTBF is the reciprocal of FR(N). 
D) Both MTBF and FR(N)increase when breakdown maintenance is replaced by preventive maintenance. 
E) MTBF and FR(N)are unrelated concepts.

Question 4

Suppose that a process is comprised of five components,each having a 75% success rate.By how much would reliability change if the process switched from having the components in series to having the components in parallel?

Accepted Answer

A) no change 
B) 100% increase 
C) 76.2% increase 
D) 76.2 % decrease 
E) 50% increase 
A) no change 
B) 100% increase 
C) 76.2% increase 
D) 76.2 % decrease 
E) 50% increase

Question 5

TPM (total productive maintenance)is an application of TQM (total quality management)principles to the area of maintenance.

Accepted Answer

A) True 
 B)False

Question 6

As the number of components in a system connected in a series decreases,all other things being equal,the reliability of the system usually:

Accepted Answer

A) increases. 
B) stays the same. 
C) decreases. 
D) increases,then decreases. 
E) decreases,then increases. 
A) increases. 
B) stays the same. 
C) decreases. 
D) increases,then decreases. 
E) decreases,then increases.

Question 7

Which of the following is a reliability tactic?

Accepted Answer

A) improving individual components 
B) increasing repair speed 
C) providing redundancy 
D) A and C 
E) A,B,and C 
A) improving individual components 
B) increasing repair speed 
C) providing redundancy 
D) A and C 
E) A,B,and C

Question 8

Small standard deviations in the MTBF distribution of a machine tend to support a policy of breakdown maintenance for that machine.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following is true regarding total productive maintenance (TPM)?

Accepted Answer

A) TPM is concerned with machine operation,not machine design. 
B) Field service and depot service perform virtually all maintenance and repair activities. 
C) Operators run their machines,but maintenance departments maintain them. 
D) TPM reduces variability through autonomous maintenance and excellent maintenance practices. 
E) TPM views maintenance and repair as tactical issues,not strategic ones. 
A) TPM is concerned with machine operation,not machine design. 
B) Field service and depot service perform virtually all maintenance and repair activities. 
C) Operators run their machines,but maintenance departments maintain them. 
D) TPM reduces variability through autonomous maintenance and excellent maintenance practices. 
E) TPM views maintenance and repair as tactical issues,not strategic ones.

Question 10

A product has three components X,Y,and Z.Product X has reliability of 0.991,and Y has reliability of 0.993.If Z has reliability of 0.991,what is the reliability of the entire product? Can Z be redesigned to be reliable enough for the entire product to have reliability of 0.99? Explain.

Accepted Answer

The product has reliability of

Question 11

Recording the maintenance history of processes,machines,or equipment is important for preventive maintenance,but largely irrelevant for breakdown maintenance.

Accepted Answer

A) True 
 B)False

Question 12

"High reliability can be achieved in a product without having high reliability in the component parts.In fact,any reliability target,no matter how high,can be achieved with only mediocre parts,so long as enough of them are present." Discuss; an example may help.

Accepted Answer

This carries the redundancy concept one

Question 13

Why is it that many cases of infant mortality of products are not due to product failure?

Accepted Answer

In many cases the failure is not of the

Question 14

A system has six components in series.Each component has a reliability of 0.99.What is the reliability of the system?

Accepted Answer

The answer of A system has six components in series.Each...

Question 15

Define maintenance.

Accepted Answer

Maintenance is all a

Question 16

The product failure rate FR(%)is the percent of failures among the total number of products tested.

Accepted Answer

A) True 
 B)False

Question 17

The objective of maintenance and reliability is to maintain the capability of the system.

Accepted Answer

A) True 
 B)False

Question 18

Reliability is the probability that a machine part or product will function properly for a specified time regardless of conditions.

Accepted Answer

A) True 
 B)False

Question 19

________ is the expected time between a repair and the next failure of a component,machine,process,or product.

Accepted Answer

Mean time

Question 20

Ten high-technology batteries are tested for 200 hours each.One failed at 20 hours; all others completed the test.FR(%)is ________ and MTBF is ________.

Accepted Answer

A) 10%; 1/1820 
B) 90%; 1/1820 
C) 10%; 1820 hours 
D) 10%; 1980 hours 
E) 10%; 2000 hours 
A) 10%; 1/1820 
B) 90%; 1/1820 
C) 10%; 1820 hours 
D) 10%; 1980 hours 
E) 10%; 2000 hours

Exam 18: Maintenance and Reliability

Which of the following increases as repairs move from the maintenance department to the depot service?

An optimal maintenance policy strikes a balance between the costs of breakdown and preventive maintenance so that the total cost of maintenance is at a minimum.

How is MTBF related to FR(N)?

Suppose that a process is comprised of five components,each having a 75% success rate.By how much would reliability change if the process switched from having the components in series to having the components in parallel?

TPM (total productive maintenance)is an application of TQM (total quality management)principles to the area of maintenance.

As the number of components in a system connected in a series decreases,all other things being equal,the reliability of the system usually:

Which of the following is a reliability tactic?

Small standard deviations in the MTBF distribution of a machine tend to support a policy of breakdown maintenance for that machine.

Which of the following is true regarding total productive maintenance (TPM)?

A product has three components X,Y,and Z.Product X has reliability of 0.991,and Y has reliability of 0.993.If Z has reliability of 0.991,what is the reliability of the entire product? Can Z be redesigned to be reliable enough for the entire product to have reliability of 0.99? Explain.

Recording the maintenance history of processes,machines,or equipment is important for preventive maintenance,but largely irrelevant for breakdown maintenance.

"High reliability can be achieved in a product without having high reliability in the component parts.In fact,any reliability target,no matter how high,can be achieved with only mediocre parts,so long as enough of them are present." Discuss; an example may help.

Why is it that many cases of infant mortality of products are not due to product failure?

A system has six components in series.Each component has a reliability of 0.99.What is the reliability of the system?

Define maintenance.

The product failure rate FR(%)is the percent of failures among the total number of products tested.

The objective of maintenance and reliability is to maintain the capability of the system.

Reliability is the probability that a machine part or product will function properly for a specified time regardless of conditions.

________ is the expected time between a repair and the next failure of a component,machine,process,or product.

Ten high-technology batteries are tested for 200 hours each.One failed at 20 hours; all others completed the test.FR(%)is ________ and MTBF is ________.

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Process Strategy

Capacity and Constraint Management

Location Strategies

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Human Resources, job Design, and Work Measurement

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Ten high-technology batteries are tested for 200 hours each.One failed at 20 hours; all others completed the test.FR(%)is and MTBF is .