The synchronous speed of an induction motor is determined by the number of stator poles and the _____.
a. frequency in hertz
b. resistance
c. voltage
d. number of end bells
a. frequency in hertz
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The relationship between bacteria and the rumen of cattle is an example of:
a. Saprophytism c. Mutualism b. Parasitism d. Commensalism
An air contaminant that is most difficult to remove through common filtration methods is:
A) Mold spores B) Pollen C) Virus D) Sawdust
If a hard hat is required during overhead cutting or welding, it should allow the attachment of _____
a. a rear deflector and a face shield b. a front deflector and ear muffs c. cotton or leather spats d. an oxygen tank for breathing
High efficiency condensers operate with ____________________ subcooling and are physically ____________________ than standard condensers.
Fill in the blank(s) with the appropriate word(s).