Which statement is correct regarding the cleaning of base metals before welding?
a. All metals should be cleaned before welding.
b. It is not necessary to clean new metal.
c. Metals only need to be cleaned if they show signs of corrosion.
d. Metals only need to be cleaned if they are painted or coated.
a
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A land-grant university located in the Midwest has an entering freshman class of 1 522 students. A random sample of 150, or approximately 10 percent, of the entering first- year students’ cumulative grade points were recorded. Academic standards require each student to have a first-year grade average of 1.5 or better to return for the sophomore year and 3.5 or better to be eligible for the Dean’s list. The grade point averages (GPA) below have been partially grouped.
(a) Determine the mean grade point average and standard deviation for the sample.
(b) Group the data into equal classes and construct a frequency distribution table.
(c) Draw a histogram of the distribution.
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The ____ of the rotating magnetic field of an AC induction motor can be changed by changing the number of stator poles.
a. acceleration b. mass c. density d. speed
The three types of eye protection used in an automotive shop are ____________________, ____________________, and ____________________.
Fill in the blank(s) with the appropriate word(s).
The biceps is muscle that covers the:
What will be an ideal response?