When do normally open relay contacts close?
A) When they receive power
B) When the relay coil is de-energized
C) When the relay coil is energized
D) They cannot close because they are open contacts.
C
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Fill in the blank(s) with the appropriate word(s).
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A. A only B. B only C. Both A and B D. Neither A nor B
What maintenance and safety pointers should you bear in mind when performing an air drill operation?
What will be an ideal response?
The angle of a piping offset that has a run of 9 inches and a travel of 12 inches is _____ degrees. (Refer to the figure above.)
a. 31 b. 34 c. 36 d. 41