Question 1

Preventive maintenance implies that we can determine when a system needs service or will need repair.

Accepted Answer

A) True 
 B)False  True

Question 2

________ consists of all activities involved in keeping a system's equipment in working order.

Accepted Answer

Maintenance

Question 3

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  False

Question 4

What is the primary concept of total productive maintenance (TPM)? List the other elements of total productive maintenance.

Accepted Answer

TPM's primary concept is reducing variab

Question 5

A product is composed of a series connection of four components with the following reliabilities.What is the reliability of the system?

Accepted Answer

The reliability of t

Question 6

Techniques for enhancing maintenance can include

Accepted Answer

A) simulation of breakdowns from prolonged use. 
B) expert systems that aid in problem-solving. 
C) automated sensors that warn when preventative maintenance is required. 
D) A and C. 
E) A,B,and C. 
A) simulation of breakdowns from prolonged use. 
B) expert systems that aid in problem-solving. 
C) automated sensors that warn when preventative maintenance is required. 
D) A and C. 
E) A,B,and C.

Question 7

Describe how the Pickering Nuclear Station achieves an excellent record of reliability through its maintenance practices.

Accepted Answer

The company recognizes the importance of

Question 8

When identifying the optimal maintenance policy,the cost of inventory maintained to compensate for the downtime is a cost often ignored.

Accepted Answer

A) True 
 B)False

Question 9

A simple electrical motor has three components: windings,armature,and housing.These three components have reliabilities of .97,.992,and .999.There is no possibility of redundant parts.The motor must have an overall reliability of 0.980,according to the product line manager who will use the motor as an input.What would you do to redesign the motor to meet this specification? Discuss,including a recalculation to meet the standard.

Accepted Answer

Since no backup is possible,individual c

Question 10

Simulation models and expert systems are useful tools for enhancing maintenance.

Accepted Answer

A) True 
 B)False

Question 11

A system consists of four components in series.The reliability of each component is 0.96.What is the reliability of the system?

Accepted Answer

The reliab

Question 12

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 13

As far as maintenance costs are concerned

Accepted Answer

A) for low levels of maintenance commitment,breakdown maintenance costs exceed preventive maintenance costs. 
B) for low levels of maintenance commitment,preventive maintenance costs exceed breakdown maintenance costs. 
C) for high levels of maintenance commitment,breakdown maintenance costs exceed preventive maintenance costs. 
D) preventive maintenance is always more economical than breakdown maintenance. 
E) Breakdown maintenance is always more economical than preventive maintenance when the "full cost of breakdowns" is taken into consideration. 
A) for low levels of maintenance commitment,breakdown maintenance costs exceed preventive maintenance costs. 
B) for low levels of maintenance commitment,preventive maintenance costs exceed breakdown maintenance costs. 
C) for high levels of maintenance commitment,breakdown maintenance costs exceed preventive maintenance costs. 
D) preventive maintenance is always more economical than breakdown maintenance. 
E) Breakdown maintenance is always more economical than preventive maintenance when the "full cost of breakdowns" is taken into consideration.

Question 14

________ is the failure rate early in the life of a product or process.

Accepted Answer

The answer of ________ is the failure rate early in...

Question 15

A system has three components in series with reliabilities 0.9,0.7,and 0.5.System reliability is

Accepted Answer

A) 0.315. 
B) 0.500. 
C) 0.700. 
D) 0.900. 
E) 2.100. 
A) 0.315. 
B) 0.500. 
C) 0.700. 
D) 0.900. 
E) 2.100.

Question 16

Consider a product that is "settled in." Its MTBF distribution has been found to be normal with a mean of 10,000 hours and a standard deviation of 100 hours.What is the probability of a breakdown before 8,000 hours? Before 9,000 hours? Would you prefer a policy of preventive maintenance,or a policy of breakdown maintenance,on this product? Explain your choice.

Accepted Answer

Both of the specified times are far belo

Question 17

The "full cost view of maintenance" results in more firms choosing a policy of breakdown maintenance,when compared to the "traditional view of maintenance."

Accepted Answer

A) True 
 B)False

Question 18

Which product design below has the higher system reliability?

Accepted Answer

A's reliability is .98 ∗ .99 ∗

Question 19

A redundant part decreases reliability if the reliability of the redundant part is lower than that of the part it is backing up.

Accepted Answer

A) True 
 B)False

Question 20

Define reliability.

Accepted Answer

Reliability is the probability

Exam 17: Maintenance and Reliability

Preventive maintenance implies that we can determine when a system needs service or will need repair.

________ consists of all activities involved in keeping a system's equipment in working order.

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

What is the primary concept of total productive maintenance (TPM)? List the other elements of total productive maintenance.

A product is composed of a series connection of four components with the following reliabilities.What is the reliability of the system?

Techniques for enhancing maintenance can include

Describe how the Pickering Nuclear Station achieves an excellent record of reliability through its maintenance practices.

When identifying the optimal maintenance policy,the cost of inventory maintained to compensate for the downtime is a cost often ignored.

Simulation models and expert systems are useful tools for enhancing maintenance.

A system consists of four components in series.The reliability of each component is 0.96.What is the reliability of the system?

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

As far as maintenance costs are concerned

________ is the failure rate early in the life of a product or process.

A system has three components in series with reliabilities 0.9,0.7,and 0.5.System reliability is

The "full cost view of maintenance" results in more firms choosing a policy of breakdown maintenance,when compared to the "traditional view of maintenance."

Which product design below has the higher system reliability?

A redundant part decreases reliability if the reliability of the redundant part is lower than that of the part it is backing up.

Define reliability.

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