Which of the following is NOT an advantage of helical gears?
A. quiet performance
B. more than one tooth is in mesh at the same time
C. reduce thrust forces
D. high strength
Answer: C
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Answer the following statement(s) true (T) or false (F)
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All OSHA records must remain on file for _____.
a. 3 years b. 2 years c. 5 years d. 7 years
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What is the frequency of alternating current?
A) The amount of current flowing B) The number of complete cycles in a second C) How often alternating current is used D) The number of cyclic deviations that occur
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Vitrified clay and concrete pipe have a wide variety of fittings available.
Answer the following statement true (T) or false (F)
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