Exam 6: Supplement: Reliability

An electrical power system consists of four major components with reliabilities of 0.99,0.94,0.92,and 0.95.In order to improve the reliability,a backup component of reliability 0.92 is added to Component 3.Compute and indicate the overall reliability of the system.

The overall reliability of the system is the ______.

A laser printer is able to operate 400 hours between two repairs,and the mean time to repair the printer is 4 hours.Compute and indicate the availability of the printer.

Which of the following statements is true with regard to relationships between reliability,maintainability,and availability?

Availability of a system refers to the ______.

A hair dryer has a mean time between failures of 822 hours and mean time to repair of 1 hour.In this case,the availability is ______.

An electrical power system consists of four major components with reliabilities of 0.99,0.90,0.80,and 0.95.If the designers want to improve the reliability of the system by adding a backup component,which component should get the backup to achieve the highest reliability?

An electrical generator has a mean time between failures of 167 and mean time to repair of 17.In this case,the availability is ______.

A sewing machine has a mean time between failures of 296 hours and mean time to repair of 11 hours.In this case,the availability is ______.

Mean time between failures (MTBF)is a quantitative measure of ______.

The computation of the reliability of the system assumes that the reliabilities of the individual components are ______ events.

A product consists of four parts.The reliability of these parts are 0.96,0.86,0.74,and 0.44.Calculate and indicate product reliability.

Consider a chainsaw that fails five times in 100 hours of operation.The failure rate of the chainsaw is ______.

A system fails 20 times in 800 hours of operation.The MTBF of the system is ______.

A system fails 200 times in 8,000 hours of operation.The MTBF of the system is ______.

Consider a chainsaw that fails five times in 100 hours of operation.The MTBF is ______.

Given the failure rate of a component,we can calculate MTBF as ______.

Mean time to repair (MTTR)is a quantitative metric for ______.

A product consists of five parts.The reliability of these parts are 0.51,0.58,0.94,0.77,and 0.92,respectively.Calculate and indicate product reliability.

An electrical power system consists of three major components with reliabilities of 0.99,0.94,and 0.90.In order to improve the reliability,a backup component of reliability 0.90 is added to Component 3.Compute and indicate the composite reliability of Component 3.