Question 1

Components A,B,and C are connected in series.Component D is connected in parallel to component B.Which of the following statements is true?

Accepted Answer

A) The system works only if A works,B or C works,and D works. 
B) Component B must work for the system to work. 
C) The system works when A works,C,works,and either B or D works. 
D) Components B and C are backups to A. 
E) The system works if D works,and any of A,B,or C works. 
A) The system works only if A works,B or C works,and D works. 
B) Component B must work for the system to work. 
C) The system works when A works,C,works,and either B or D works. 
D) Components B and C are backups to A. 
E) The system works if D works,and any of A,B,or C works. C

Question 2

Why is it that many cost curves associated with maintenance rarely consider the full cost of a breakdown?

Accepted Answer

Many costs are ignored because they are not directly related to the immediate breakdown.For example,some of these costs include the cost of inventory,employee morale,and impact on delivery schedules and customer relations.

Question 3

Suppose that a car mechanic offers you a deal that for the next 3 years any breakdowns will be covered,so long as you bring your car in for $50 preventative maintenance sessions each month.If you predict the likelihood of a breakdown being 25% without the maintenance,how much must a breakdown cost for you to prefer the preventative maintenance?

Free

(Essay)

4.9/5

(33)

Question 3

Correct Answer:

Verified

36 months ∗ $50/month = .25 ∗ Breakdown Cost
Breakdown cost = $7200.

Accepted Answer

36 months ∗ $50/month = .25 ∗ Breakdown Cost
Breakdown cost = $7200.

Question 4

A system is composed of three components A,B,and C.All three must function for the system to function.There are currently no backups in place.The system has a reliability of 0.966.If a backup is installed for component A,the new system reliability will be

Accepted Answer

A) unchanged. 
B) less than 0.966. 
C) greater than it would be if a backup were also installed for component B. 
D) greater than 0.966. 
E) equal to exactly 0.966. 
A) unchanged. 
B) less than 0.966. 
C) greater than it would be if a backup were also installed for component B. 
D) greater than 0.966. 
E) equal to exactly 0.966.

Question 5

Which of the following costs tend to be ignored in determining the optimal maintenance policy?

Accepted Answer

A) expected breakdown costs 
B) preventive maintenance costs 
C) the costs associated with various levels of commitment to maintenance 
D) cost of low morale 
E) total maintenance cost 
A) expected breakdown costs 
B) preventive maintenance costs 
C) the costs associated with various levels of commitment to maintenance 
D) cost of low morale 
E) total maintenance cost

Question 6

Define maintenance.

Accepted Answer

Maintenance is all a

Question 7

Preventive maintenance is nothing more than keeping the equipment and machinery running.

Accepted Answer

A) True 
 B)False

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

________ is the use of a component in parallel to raise reliabilities.

Accepted Answer

The answer of ________ is the use of a component...

Question 10

"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 11

Infant mortality in electronics follows which kind of distribution?

Accepted Answer

A) normal 
B) negative exponential 
C) exponential 
D) random 
E) one-sided normal distribution 
A) normal 
B) negative exponential 
C) exponential 
D) random 
E) one-sided normal distribution

Question 12

What is breakdown maintenance?

Accepted Answer

Breakdown maintenance is the r

Question 13

As a firm's maintenance commitment increases,

Accepted Answer

A) the breakdown maintenance costs increase and the preventive maintenance costs decrease. 
B) both the breakdown maintenance costs and the preventive maintenance costs decrease. 
C) the breakdown maintenance costs decrease and the preventive maintenance costs increase. 
D) both the breakdown maintenance costs and the preventive maintenance costs increase. 
E) None of the above are true. 
A) the breakdown maintenance costs increase and the preventive maintenance costs decrease. 
B) both the breakdown maintenance costs and the preventive maintenance costs decrease. 
C) the breakdown maintenance costs decrease and the preventive maintenance costs increase. 
D) both the breakdown maintenance costs and the preventive maintenance costs increase. 
E) None of the above are true.

Question 14

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 15

Ten high-technology batteries are tested for 200 hours each.One failed at 50 hours;all others completed the test.FR(%)is ________ and FR(N)is ________.

Accepted Answer

A) 10%;1/1850 
B) 10%;1/2000 
C) 25%;1850 hours 
D) 90%;1/2000 
E) Indeterminate;no standard deviation is given. 
A) 10%;1/1850 
B) 10%;1/2000 
C) 25%;1850 hours 
D) 90%;1/2000 
E) Indeterminate;no standard deviation is given.

Question 16

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

Accepted Answer

The answer of ________ consists of all activities involved in...

Question 17

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 n

Question 18

The inverse of the mean time between failures is the ________.

Accepted Answer

number of failures d

Question 19

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 20

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

Exam 17: Maintenance and Reliability

Components A,B,and C are connected in series.Component D is connected in parallel to component B.Which of the following statements is true?

Why is it that many cost curves associated with maintenance rarely consider the full cost of a breakdown?

A system is composed of three components A,B,and C.All three must function for the system to function.There are currently no backups in place.The system has a reliability of 0.966.If a backup is installed for component A,the new system reliability will be

Which of the following costs tend to be ignored in determining the optimal maintenance policy?

Define maintenance.

Preventive maintenance is nothing more than keeping the equipment and machinery running.

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

________ is the use of a component in parallel to raise reliabilities.

"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.

Infant mortality in electronics follows which kind of distribution?

What is breakdown maintenance?

As a firm's maintenance commitment increases,

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

Ten high-technology batteries are tested for 200 hours each.One failed at 50 hours;all others completed the test.FR(%)is ________ and FR(N)is ________.

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

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

The inverse of the mean time between failures is the ________.

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

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

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Ten high-technology batteries are tested for 200 hours each.One failed at 50 hours;all others completed the test.FR(%)is and FR(N)is .