The wiring and connectors that carry the power to a motor must be in good condition. When a connection becomes loose, oxidation of the copper wire occurs. The oxidation ____.
A. has no effect on the electrical connection
B. acts as an electrical resistance and causes the connection to heat more
C. decreases the resistance
D. none of the above
Answer: B
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The ____________________ is called the true stomach of a ruminant
Fill in the blank(s) with the appropriate word(s).
You are working with a soil colloid known to have a reasonably high potassium level, a cation exchange capacity of about 20 cmolc/kg of clay and little tendency to swell when wetted. Which of the following is it most apt to be the dominant clay mineral in this soil?
A) kaolinite B) vermiculite C) humus D) fine-grained mica E) smectite
Which statement best describes the phase angle of a parallel RLC circuit at resonance?
A) With a net reactance at maximum the phase angle is zero. B) With a net reactance at minimum the phase angle is zero. C) Total current flow is minimum. D) either A or C
In the thread specification 3/4 - 14 NPT, 3/4 represents _____
a. 3 to 4 threads per inch b. the expected makeup length c. the nominal pipe size d. the length of the threaded portion of the pipe