The primary method of varying the speed on a DC shunt motor is to adjust the voltage and current on the field
winding or the _____.
a. rheostat
b. armature
c. controller
d. stator key
b
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An alternative to grounding the secondary is to let it ____; that is, the secondary remains ungrounded.
A. sink B. float C. surface D. exit
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The preferred tool for cutting PVC pipe is:
A) A plastic tubing shear. B) A circular saw. C) A pocket knife. D) A hacksaw.
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Describe the spring action with a worn-out shock absorber.
What will be an ideal response?
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Single-pole portable cable connectors for portable switchboard on stage, where used, shall be listed and ____.
A. of the locking type B. connected to a branch circuit C. connected to a receptacle D. of the unlocked type
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