Describe how the rotor turns in a three phase AC motor.
What will be an ideal response?
An AC three-phase motor has three power sources each 120 deg. apart from each other.The rotor is pulled by the continuously rotating magnetic field in the stator. The stator does not rotate bot its external magnetic field does change from pole to pole.
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Why is it not advisable to sand bearings with an emery cloth?
What will be an ideal response?
Functional foods come only from animals
Indicate whether the statement is true or false
Technician A says that hydrogen is the fuel source for a fuel cell. Technician B says that hydrogen is an energy carrier for a fuel cell. Which technician is correct?
A) Technician A B) Technician B C) Both Technicians D) Neither Technician
The on-site installation time for a fiberboard system is __________ than for a prefabricated duct system, but the cost of the material is __________.
A. greater, less B. less, greater