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LOG104 Reliability, Availability, and Maintainability (RAM) : LESSON 1; Questions & Answers 100% Verified
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LOG104 Reliability, Availability, and Maintainability (RAM) : LESSON 1; Questions & Answers 100% Verified In addition to probability, which of the following are also elements in the measurement of reliability? Select the three alternatives that apply. Answer-1.** Performance 2.** Time 3.***...

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  • August 8, 2024
  • 7
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • log104 reliability availability and maintainabil
  • maintainability ram lesson 1
  • questions answers 100 verified

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LOG104 Reliability, Availability, and Maintainability
(RAM) : LESSON 1; Questions & Answers 100% Verified
In addition to probability, which of the following are also elements in the measurement of
reliability?



Select the three alternatives that apply. 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 Answer-1,111 hours


Which of the following address supply and maintenance issues affecting a system?
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? 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?

, LOG104 Reliability, Availability, and Maintainability
(RAM) : LESSON 1; Questions & Answers 100% Verified
Categories Hard Top Convertible


Miles 130,000 85,000


Number of Failures 3 7



Mean Miles Between Failures 43,333 miles 12,143 miles 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 Answer-Convertible


Which of the following are reliability factors? Select the two alternative that apply.
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? 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

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