Topics: Reliability engineering, Incandescent light bulb, Interest Pages: 66 (12660 words) Published: October 25, 2012
* Question 1
0 out of 2 points
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| An undergraduate business student has purchased a laptop computer for use during exams. This laptop is perfectly reliable except for two parts: its microchip, which has a failure rate of one in every twenty hours of operation; and its battery, which has a failure rate of one in every ten hours of operation. In addition, on average the battery will wear out in five hours, with a standard deviation of 30 minutes. Assuming that a new battery has just been installed, what is the probability that the battery will perform reliably during a one-hour exam?Answer| | | | | Selected Answer:|    0.05|

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* Question 2
2 out of 2 points
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| The Ready Light Company produces a flashlight, which is perfectly reliable except for two components: the battery, which has a random failure rate of one in every five hours of operation; and the light bulb, which has a random failure rate of three in every ten hours. If the company includes a backup light bulb with each flashlight, what is the probability that the flashlight will perform reliably for one hour (excluding light bulb replacement time, if any)?Answer| | | | | Selected Answer:|    0.7280|

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* Question 3
0 out of 2 points
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| The Ready Light Company produces a flashlight, which is perfectly reliable except for two components: the battery, which has a random failure rate of one in every five hours of operation; and the light bulb, which has a random failure rate of three in every ten hours. What is the probability that the battery will perform reliably for one hour?Answer| | | | | Selected Answer:|    0.2|

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* Question 4
0 out of 2 points
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| The Ready Light Company produces a flashlight, which is perfectly reliable except for two components: the battery, which has a random failure rate of one in every five hours of operation; and the light bulb, which has a random failure rate of three in every ten hours. If the company includes both a backup light bulb and a backup battery with each flashlight, what is the probability that the flashlight will perform reliably for one hour (excluding replacement time)?Answer| | | | | Selected Answer:|    0.6720|

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* Question 5
0 out of 2 points
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| An undergraduate business student has purchased a laptop computer for use during exams. This laptop is perfectly reliable except for two parts: its microchip, which has a failure rate of one in every twenty hours of operation; and its battery, which has a failure rate of one in every ten hours of operation. In addition, on average the battery will wear out in five hours, with a standard deviation of 30 minutes. Assuming that a new battery has just been installed, what is the probability that the laptop will perform reliably during a one-hour exam?Answer| | | | | Selected Answer:|    0.85|

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* Question 6
0 out of 1 points
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| The method of financial analysis which focuses on the length of time it takes to recover the initial cost of an investment is:Answer| | | | | Selected Answer:|    internal rate of return|

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* Question 7
1 out of 1 points
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| Determining the timing and degree of capacity change can use the approach of:Answer| | | | | Selected Answer:|    expand early strategy|
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* Question 8
1 out of 1 points
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| Production units have an optimal rate of output where:Answer| | | | | Selected Answer:|    unit costs are minimum|
Correct Answer:|    unit costs are minimum|
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* Question 9
0 out of 1 points
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| Efficiency is defined as the ratio of:Answer| | | |
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