Question 1

Which one of the following is NOT necessary to identify the optimal maintenance policy?

Accepted Answer

A) historical data on maintenance costs 
B) cost of performing the analysis 
C) breakdown probabilities 
D) breakdown occurrences 
E) repair times 
A) historical data on maintenance costs 
B) cost of performing the analysis 
C) breakdown probabilities 
D) breakdown occurrences 
E) repair times

Question 2

MTBF measures the average:

Accepted Answer

A) calendar time between failures. 
B) operating time between failures. 
C) number of failures per unit time. 
D) number of operations between failures. 
E) downtime per breakdown. 
A) calendar time between failures. 
B) operating time between failures. 
C) number of failures per unit time. 
D) number of operations between failures. 
E) downtime per breakdown.

Question 3

The Everstart is a battery with an intended design life of 72 months.Stephanie Bradley recently put five of these batteries through accelerated testing (the company couldn't wait six years)to simulate failure patterns.The test results had one failure at 26 months,one failure at 32 months,one failure at 50 months,and one failure at 62 months.Calculate FR(%),FR(N),and MTBF.

Accepted Answer

FR(%)= 4/5 or 80%.FR(N)= 4/(72

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

DuLarge Marine manufactures diesel engines for shrimp trawlers and other small commercial boats.One of their CNC machines has caused several problems.Over the past 30 weeks,the machine has broken down as indicated below.   What is the expected number of breakdowns per week?

Accepted Answer

A) 1 
B) 2 
C) 6 
D) 10 
E) 30 
A) 1 
B) 2 
C) 6 
D) 10 
E) 30

Question 6

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

Accepted Answer

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

Question 7

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 8

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 9

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 10

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%,98%,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 11

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 12

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 13

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 14

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.

Which one of the following is NOT necessary to identify the optimal maintenance policy?

MTBF measures the average:

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

DuLarge Marine manufactures diesel engines for shrimp trawlers and other small commercial boats.One of their CNC machines has caused several problems.Over the past 30 weeks,the machine has broken down as indicated below. What is the expected number of breakdowns per week?

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

As far as maintenance costs are concerned:

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

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

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.

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

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?

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?

Operations and Productivity

Operations Strategy in a Global Environment

Project Management

Forecasting

Design of Goods and Services

Managing Quality

Process Strategy

Location Strategies

Layout Strategies

Human Resources,job Design,and Work Measurement

Supply Chain Management

Inventory Management

Aggregate Planning and Sop

Material Requirements Planning Mrpand ERP

Short-Term Scheduling

Lean Operations

Sustainability in the Supply Chain

Statistical Process Control

Capacity and Constraint Management

Supply Chain Management Analytics

Decision-Making Tools

Linear Programming

Transportation Models

Waiting-Line Models

Learning Curves

Simulation

Filters

Exam 17: Maintenance and Reliability

Which one of the following is NOT necessary to identify the optimal maintenance policy?

MTBF measures the average:

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

DuLarge Marine manufactures diesel engines for shrimp trawlers and other small commercial boats.One of their CNC machines has caused several problems.Over the past 30 weeks,the machine has broken down as indicated below. What is the expected number of breakdowns per week?

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

As far as maintenance costs are concerned:

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

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

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.

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

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?

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?

Operations and Productivity

Operations Strategy in a Global Environment

Project Management

Forecasting

Design of Goods and Services

Managing Quality

Process Strategy

Location Strategies

Layout Strategies

Human Resources,job Design,and Work Measurement

Supply Chain Management

Inventory Management

Aggregate Planning and Sop

Material Requirements Planning Mrpand ERP

Short-Term Scheduling

Lean Operations

Sustainability in the Supply Chain

Statistical Process Control

Capacity and Constraint Management

Supply Chain Management Analytics

Decision-Making Tools

Linear Programming

Transportation Models

Waiting-Line Models

Learning Curves

Simulation

Filters