____ are programs that perform operations such as copying files, listing directories, and communicating with other users.
A. Extents
B. Utilities
C. Applications
D. Services
Answer: B
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One of the three factors that will cause a three-phase motor’s magnetic field to rotate is that the _____.
a. voltages of a three-phase electrical system are 180° out of phase with each other b. stator windings around the inside of the motor are arranged in a specific manner to induce rotation c. stators have dual-voltage d. three voltages maintain constant polarity
In order to prevent a duct-mounted electric heater from being energized when the fan is not on, a(n) ____________________ should be used.
Fill in the blank(s) with the appropriate word(s).
Explain the term forward bias.?
What will be an ideal response?
For the Boolean expression: X = A + B, when does X = 0?
A. when A=1 or B=1, even if A=B=1 B. when A=1 and B=1 C. when A=0 and B=0 D. when A=1 or B=1, but not when A=B=1 E. when A=0 or B=0