Question 1

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 2

A system has 12 components in series. Each component has a reliability of 0.95. What is the reliability of the system?

Accepted Answer

The answer of A system has 12 components in series....

Question 3

Twenty high-technology batteries are tested for 200 hours each. One failed at 20 hours; another failed at 140 hours; all others completed the test. FR(%) is ________ and MTBF is ________.

Accepted Answer

A)  20%; 880 hours 
B)  10%; 3760 hours 
C)  20%; 3760 hours 
D)  10%; 1880 hours 
E)  80%; 920 hours 
A)  20%; 880 hours 
B)  10%; 3760 hours 
C)  20%; 3760 hours 
D)  10%; 1880 hours 
E)  80%; 920 hours

Question 4

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 5

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

Accepted Answer

A) True 
 B)False

Question 6

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 7

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)  10%; 1/1950 
A)  10%; 1/1850 
B)  10%; 1/2000 
C)  25%; 1850 hours 
D)  90%; 1/2000 
E)  10%; 1/1950

Question 8

Describe how the Orlando Utilities Commission obtains competitive advantage through its maintenance practices.

Accepted Answer

The company recognizes the importance of

Question 9

The reliability of a system in which each individual component must function in order for the entire system to function, and in which each component has its own unique reliability, independent of other components, is the sum of the probabilities of each of those components.

Accepted Answer

A) True 
 B)False

Question 10

Suppose that a three-stage process had reliability ratings of .7, .8, and .9 at each station and that a failure at any station represented a failure for the entire process. If each station is given a redundant check with the same reliability as the original component, what is the increase in system reliability?

Accepted Answer

Old = (.7)(.8)(.9) = .504
New

Question 11

The academic service commonly referred to as "registration" consists of several smaller components: advising, registration for courses, fee assessment, financial aid calculations, and fee payment. Each of these modules operates independently and has some probability of failure for each student. If the five probabilities that accompany these services are 95%, 90%, 99%, 93%, and 99%, respectively, what is the "reliability" of the entire product from the student's perspective, i.e., the probability that all five will work according to plan?

Accepted Answer

Reliabilit

Question 12

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 13

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

Accepted Answer

A) True 
 B)False

Question 14

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 15

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

Accepted Answer

Mean time

Question 16

Techniques for improving total productive maintenance can include which of the following?

Accepted Answer

A)  simulation 
B)  expert systems 
C)  sensors 
D)  A and C 
E)  A, B, and C 
A)  simulation 
B)  expert systems 
C)  sensors 
D)  A and C 
E)  A, B, and C

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

If the mean time between failures has been calculated to be 2,000 hours, then FR(N) = 0.005 failures/unit-hour.

Accepted Answer

A) True 
 B)False

Question 19

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

Accepted Answer

They "burn in" their products

Question 20

What is the process that involves repair on an emergency or priority basis?

Accepted Answer

A)  breakdown maintenance 
B)  emergency maintenance 
C)  failure maintenance 
D)  preventive maintenance 
E)  priority maintenance 
A)  breakdown maintenance 
B)  emergency maintenance 
C)  failure maintenance 
D)  preventive maintenance 
E)  priority maintenance

Exam 16: Maintenance and Reliability

The normal distribution is an appropriate model of:

A system has 12 components in series. Each component has a reliability of 0.95. What is the reliability of the system?

Twenty high-technology batteries are tested for 200 hours each. One failed at 20 hours; another failed at 140 hours; all others completed the test. FR(%) is ________ and MTBF is ________.

As far as maintenance costs are concerned:

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

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

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 ________.

Describe how the Orlando Utilities Commission obtains competitive advantage through its maintenance practices.

The reliability of a system in which each individual component must function in order for the entire system to function, and in which each component has its own unique reliability, independent of other components, is the sum of the probabilities of each of those components.

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

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

When depot service is compared to operator maintenance:

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

Techniques for improving total productive maintenance can include which of the following?

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

If the mean time between failures has been calculated to be 2,000 hours, then FR(N) = 0.005 failures/unit-hour.

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

What is the process that involves repair on an emergency or priority basis?

Operations and Productivity

Operations Strategy in a Global Environment

Project Management

Forecasting

Design of Goods and Services

Managing Quality

Process Strategies

Location Strategies

Human Resources, Job Design, and Work Measurement

Supply Chain Management

Inventory Management

Aggregate Planning and Sop

Material Requirements Planning Mrp and Erp

Short-Term Scheduling

Lean Operations

Decision-Making Tools

Linear Programming

Transportation Models

Waiting-Line Models

Learning Curves

Simulation

Applying Analytics to Big Data in Operations Management

Filters

Twenty high-technology batteries are tested for 200 hours each. One failed at 20 hours; another failed at 140 hours; all others completed the test. FR(%) is and MTBF is .

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 .