The direction of rotation of a DC motor is changed by reversing the __________.
A. brush position
B. supply polarity
C. field and armature connections
D. field or armature connections
Answer: D
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A(n) ____________________ measures voltage.
Fill in the blank(s) with the appropriate word(s).
It is important to prevent water from getting behind the siding, where it can cause dry rot and attract insects.
Answer the following statement true (T) or false (F)
A certain type of plywood consists of five layers. The thicknesses of the layers are independent and normally distributed with mean 5 mm and standard deviation 0.2 mm.
a. Find the mean thickness of the plywood. b. Find the standard deviation of the thickness of the plywood. c. Find the probability that the plywood is less than 24 mm thick.
Define the term "preventive maintenance".
What will be an ideal response?