Question 1

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

Accepted Answer

Mean time

Question 2

The objective of maintenance and reliability is to:

Accepted Answer

A) ensure that breakdowns do not affect the quality of the products. 
B) ensure that no breakdowns will ever occur. 
C) ensure that preventive maintenance costs are kept as low as possible. 
D) maintain the capability of the system. 
E) ensure that maintenance employees are fully utilized. 
A) ensure that breakdowns do not affect the quality of the products. 
B) ensure that no breakdowns will ever occur. 
C) ensure that preventive maintenance costs are kept as low as possible. 
D) maintain the capability of the system. 
E) ensure that maintenance employees are fully utilized.

Question 3

A product has four components A,B,C,and D.The finished product must have a reliability of at least .95.The first three components come from a supplier,and they have reliabilities of .99,.98,and .995,respectively.The fourth component is being designed now.What must the reliability of component D be in order to meet the product reliability condition?

Accepted Answer

System reliability must be at least .99

Question 4

Given the following data,find the expected breakdown cost.The cost per breakdown is $200.

Accepted Answer

@#IMG-DLM& Expected number of breakdowns

Question 5

________ 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 6

Electronic sensors have proven so effective that preventive maintenance is no longer necessary.

Accepted Answer

A) True 
 B)False

Question 7

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

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 8

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 9

What is the primary concept of total productive maintenance (TPM)? Identify the four elements that productive maintenance includes.

Accepted Answer

TPM's primary concept is reducing variab

Question 10

How do many electronic firms deal with infant mortality in their products?

Accepted Answer

They "burn in" their products

Question 11

What is the impact on system reliability of adding parts or components in parallel?

Accepted Answer

This will increase t

Question 12

The normal distribution is an appropriate model of:

Accepted Answer

A) the high initial failure rates of product,machine,or processes. 
B) system reliability where components are connected in series. 
C) system reliability where components are connected in parallel. 
D) the MTBF distribution of products,machines,or processes that have "settled in." 
E) the full cost view of maintenance. 
A) the high initial failure rates of product,machine,or processes. 
B) system reliability where components are connected in series. 
C) system reliability where components are connected in parallel. 
D) the MTBF distribution of products,machines,or processes that have "settled in." 
E) the full cost view of maintenance.

Question 13

Explain why a small standard deviation of the MTBF distribution makes a product,machine,or process a good candidate for preventive maintenance while a large standard deviation does not.

Accepted Answer

A small standard deviation means that th

Question 14

Simulation models and expert systems are useful tools for improving total productive maintenance.

Accepted Answer

A) True 
 B)False

Question 15

A system has three components in parallel with reliabilities 0.9,0.7,and 0.5.What is the system reliability?

Accepted Answer

A) 0.315 
B) 0.700 
C) 0.900 
D) 0.985 
E) 2.100 
A) 0.315 
B) 0.700 
C) 0.900 
D) 0.985 
E) 2.100

Question 16

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 17

Sophisticated sensors in a maintenance system can detect:

Accepted Answer

A) the slightest unusual vibration. 
B) low standard deviation in MTBF. 
C) low cost to repair options. 
D) repairs that carry little nonmonetary consequences. 
E) full cost view of maintenance. 
A) the slightest unusual vibration. 
B) low standard deviation in MTBF. 
C) low cost to repair options. 
D) repairs that carry little nonmonetary consequences. 
E) full cost view of maintenance.

Question 18

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 19

When depot service is compared to operator maintenance:

Accepted Answer

A) operator maintenance is slower than depot service. 
B) competence is higher,but costs may also be higher,with depot service. 
C) depot service is often the weak link in the chain because of the lack of specific training. 
D) depot service occurs on-site,while operator maintenance occurs off-site. 
E) depot service is better for systems connected in parallel,while operator maintenance is preferred for systems connected in series. 
A) operator maintenance is slower than depot service. 
B) competence is higher,but costs may also be higher,with depot service. 
C) depot service is often the weak link in the chain because of the lack of specific training. 
D) depot service occurs on-site,while operator maintenance occurs off-site. 
E) depot service is better for systems connected in parallel,while operator maintenance is preferred for systems connected in series.

Question 20

The MTBF (mean time between failures)is calculated as the reciprocal of the number of failures during a period of time.

Accepted Answer

A) True 
 B)False

Exam 17: Maintenance and Reliability

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

The objective of maintenance and reliability is to:

Given the following data,find the expected breakdown cost.The cost per breakdown is $200.

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

Electronic sensors have proven so effective that preventive maintenance is no longer necessary.

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

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

What is the primary concept of total productive maintenance (TPM)? Identify the four elements that productive maintenance includes.

How do many electronic firms deal with infant mortality in their products?

What is the impact on system reliability of adding parts or components in parallel?

The normal distribution is an appropriate model of:

Explain why a small standard deviation of the MTBF distribution makes a product,machine,or process a good candidate for preventive maintenance while a large standard deviation does not.

Simulation models and expert systems are useful tools for improving total productive maintenance.

A system has three components in parallel with reliabilities 0.9,0.7,and 0.5.What is the system reliability?

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

Sophisticated sensors in a maintenance system can detect:

Which of the following is a reliability tactic?

When depot service is compared to operator maintenance:

The MTBF (mean time between failures)is calculated as the reciprocal of the number of failures during a period of time.

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