The speed of a shunt motor can be controlled by
A) varying the voltage across the field winding.
B) varying the field current.
C) varying the armature current.
D) A and C
E) all of the above
E
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What is the pressure that particular gas, contained in a mixture of gases, would have if it were alone in the container?
A) Vapor pressure B) Gauge pressure C) Partial pressure D) Vacuum pressure
Pressure gauges used during testing must be indicating pressure gauges with dials that have a graduated scale range of approximately _____ times the intended maximum test pressure.
a. one and one-half b. two c. three d. four
Almost animals, including humans, are susceptible to parasites
Indicate whether the statement is true or false
On a winder stairway, the winder tread width at a point 12" from the narrower end of the winders must be
_____. a. at least 9" b. two-thirds the tread width in the straight portion of the stairway c. 10"-12" d. equal to the tread width in the straight portion of the stairway