__________ are strips of metal that are formed into a flattened C shape. __________ are simply strips of metal formed into an S shape. Both are used in joining sections of galvanized sheet metal in a duct system.
What will be an ideal response?
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The purpose of the field reporting system is to _____.
a. expedite equipment utilization b. acquire information about work performed c. identify information about work budgeted d. identify cost control procedures
?Why would you not reduce the flame size below its correct setting if the torch flame is too large for the job?
A. ?Lowering the flame can result in the tip overheating. B. ?The flame would go out so you would have to relight the torch. C. ?Because lowering the gas flow will not reduce the flame heat. D. ?You would lower the flame so you would not burn through the metal due to the excessively large flame.
?Why are the GMA and FCA welding processes used?
A. ?They both use the same filler metal. B. ?They can rapidly produce high-quality welds. C. ?FCA welding is the preferred process because it is better and faster than GMA welding. D. ?Because once you are certified to make GMA welds, you are automatically certified to make FCA welds too.
During a recent drought, a water utility in a certain town sampled 100 residential water bills and found that 73 of the residences had reduced their water consumption over that of the previous year.
a. Find a 95% confidence interval for the proportion of residences that reduced their water consumption. b. Find a 99% confidence interval for the proportion of residences that reduced their water consumption. c. Find the sample size needed for a 95% confidence interval to specify the proportion to within ±0.05. d. Find the sample size needed for a 99% confidence interval to specify the proportion to within ±0.05. e. Someone claims that more than 70% of residences reduced their water consumption. With what level of confidence can this statement be made? f. If 95% confidence intervals are computed for 200 towns, what is the probability that more than 192 of the confidence intervals cover the true proportions?