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LOG104 Reliability, Availability, and Maintainability (RAM) : LESSON 1 correctly answered to pass
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LOG104 Reliability, Availability, and Maintainability (RAM) : LESSON 1 correctly answered to pass
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LOG104 Reliability, Availability, andMaintainability (RAM) : LESSON 1
In addition to probability, which of the following are also elements in the measurement of reliability?
Select the three alternatives that apply. - correct answer ✔✔1.** Performance
2.** Time
3.*** Operating Conditions2
Using the data from the truck example, calculate the generators' MTBR (for-cause). After two years, the
fleet had accumulated 1,000,000 operating hours. There were 100 incidents in which a truck broke down
due to generator failure. Overall, there were 1,200 "maintenance events" involving generators, as
follows:
100 on-equipment repairs (by turning wrenches, screwdrivers, etc.)
200 removals to facilitate other maintenance (50 of these resulted in damage to the generators).
900 removals for-cause that were forwarded to the depot for repair, where 600 were identified as design
or manufacturing related problems - correct answer ✔✔1,111 hours
Which of the following address supply and maintenance issues affecting a system? - correct answer
✔✔Mean Time Between Demand (MTBD)
Mean Time Between Failure (MTBF)Mean Time Between Removal (MTBR)Mean Time Between
Unscheduled Maintenance (MTBUM)
Which of the following is a brief definition of maintainability? - correct answer ✔✔The relative ease and
economy of time and resources with which an item can be retained or restored to a specific condition.
The table shows the Mean Miles Between Failure for the two cars. Which car is more reliable?
, Categories Hard Top Convertible
Miles 130,000 85,000
Number of Failures 3 7
Mean Miles Between Failures 43,333 miles 12,143 miles - correct answer ✔✔Hard Top
Based on the data, which car takes less time to repair?
Categories Hard Top Convertible
Number of Failures 3 7
Total Repair Time 30 hours 42 hours
MeanTime To Repair 10 hours 6 hours - correct answer ✔✔Convertible
Which of the following are reliability factors? Select the two alternative that apply. - correct answer
✔✔1.*** The number of miles a tire can accumulate before it wears out
2.***** The number of hours a computer operates before it fails
How is availability defined? - correct answer ✔✔The degree to which an item is operational at the start
of a mission when the mission is called for at an unknown time
Which of the following are the sub-elements of availability? Select the three alternatives that apply. -
correct answer ✔✔1.*** ~ Achieved Availability
2. *** ~ Inherent Availability
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