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The variance of failure time (time to failure) of an electric motor in shovel is 1600 hr2. If the failure time follows an exponential distribution. the expected mean time between failure in hr is
Which of the following equation is/are not correct? Consider MWT – Mean Waiting time; ADT – Administrative delay time; LDT – Logistic delay time; MDT – Mean down time; MTTR – Mean time to repair; MTTF – Mean time to failure.
RAID level 0+1 is used because, RAID level 0 provides ______ whereas RAID level 1 provides ________
The mean time to failure of a mirrored disk depends on ____________ I) the mean time to failure of individual disks II) the mean time to repair
Two processes X and Y need to access a critical section. Consider the following synchronization construct used by both the processes Process ? /* other code for process ? */ while(true) { varP = true; while(varQ == true) { /* Critical Section */ varP = false; } } /* other code for process ?? */   Process ? /* other code for process ? */ while(true) { varQ = true; while(varP == true) { /* Critical Section */ varQ = false; } } /* other code for process ? */   Here, varP and varQ are shared variables and both are initialized to false. Which one of the following statements is true?
Consider the following statements.
1. All valid arguments contain only true premises and a true conclusion.
2. Some valid arguments contain only false propositions - false premises and a true conclusion.
3. All valid arguments contain only false propositions all premises are false, conclusion is false as well.
Which of the above statements is correct?
Workability of concrete can be measured using slump, compaction factor and Vee-bee time. Consider the following statements for workability of concrete: (i) As the slump increases, the Vee-bee time increases. (ii) As the slump increases, the compaction factor increases. Which of the following is TRUE?
Engines are rated at specified conditions. Then which of the following statements are correct? 1. Power developed increases as local temperature increases. 2. Power developed increases as local temperature decreases 3. Power developed is not dependent on local temperature. 4. Power developed increases as local atmospheric pressure increases. 5. Power developed increases as local atmospheric pressure decreases.
If the mean time to failure of a single disk is 100,000 hours, then the mean time to failure of some disk in an array of 100 disks will be ____________
Consider the following statements regarding typical analysis of bolt failure :  1. 15% failure of bolt occur at the fillet under the head. 2. 50% failure of bolt occur at the end of threads on the shank. 3. 80% failure of bolt occur in the threads that are in contact with the nut. Which of the above statements is/are correct ?