A typical ac synchronous motor has
A. no brushes
B. a slip ring and brushes
C. a rotating stator housing
D. a permanent magnet rotor
E. a commutator and brushes
Answer: E
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The number of turns of wire in the first secondary winding is ____.
a. 854
b. 1005
c. 1277
d. 1401
Circular slots are best machined with:
A) Circular slot cutters B) The aid of a rotary table C) The workpiece clamped to the table D) All of the above
In the greenhouse effect what type of radiation is re-emitted by the earth's surface and is absorbed and reflected by greenhouse gas molecules in the atmosphere warming the earth's surface and lower atmosphere?
A. Ultraviolet B. Infrared C. Gama D. Nuclear
A 50 ohm load and a 100 ohm load are connected in series to a 120 volt supply. A voltmeter would read ____________________ volts if connected across the 50 ohm load, and ____________________ volts if connected across the 100 ohm load.
Fill in the blank(s) with the appropriate word(s).