There are three possible field connections for ____ generators, energized by current generated in the armature of the same machine: series, shunt, and compound.
a. self-excited
b. series
c. separately excited
d. simple
a. self-excited
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Where a main bonding jumper is required by the NEC®, the jumper cannot be less than what percentage of the area of the largest phase conductor?
a. 12.50% b. 14% c. 17.50% d. 20%
What quality tool is used to indicate relationships between two variables or pairs of data?
a. histogram b. scatter plots c. pareto d. SPC chart
Why is considered a mistake to allow an air-conditioning system to remain empty?
What will be an ideal response?
A sample of seven concrete blocks had their crushing strength measured in MPa. The results were
1367.6 1411.5 1318.7 1193.6 1406.2
1425.7 1572.4
Ten thousand bootstrap samples were generated from these data, and the bootstrap sample means were arranged in order. Refer to the smallest mean as 
, the second smallest as 
, and so on, with the largest being
a. Compute a 95% bootstrap confidence interval for the mean compressive strength, using method 1 as described on page 391.
b. Compute a 95% bootstrap confidence interval for the mean compressive strength, using method 2 as described on page 391.
c. Compute a 99% bootstrap confidence interval for the mean compressive strength, using method 1 as described on page 391.
d. Compute a 99% bootstrap confidence interval for the mean compressive strength, using method 2 as described on page 391.