A customer orders 41 of the upright welded supports shown in Figure 3-1. In inches, the support-plate stock needed to complete this order is how long?
ANS: 533
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IDENTIFY TEST PROCESS SYMBOLS AND DIAGRAMS
The part that is MOST-Likely a rear seal is the:
A. flywheel bolt B. rope seal C. clutch D. gasket
Answer the following statement(s) true (T) or false (F)
In a study of the lifetimes of electronic components, a random sample of 400 components are tested until they fail to function. The sample mean lifetime was 370 hours and the standard deviation was 650 hours. a. An approximate 95% confidence interval for the mean lifetime of this type of component is from 306.3 to 433.7 hours. b. About 95% of the sample components had lifetimes between 306.3 and 433.7 hours. c. If someone takes a random sample of 400 components, divides the sample standard deviation of their lifetimes by 20, and then adds and subtracts that quantity from the sample mean, there is about a 68% chance that the interval so constructed will cover the mean lifetime of this type of component. d. The z table can’t be used to construct confidence intervals here, because the lifetimes of the components don’t follow the normal curve. e. About 68% of the components had lifetimes in the interval 370 ± 650 hours.
The difference between a conventional tire and a run-flat tire is the ________
A) Amount of air pressure B) Size C) Type of construction D) All of the above