What is the principle on which frequency control operates?
What will be an ideal response?
Frequency control operates on the principle that the frequency of the induced voltage in the motor secondary (rotor) decreases as the speed of the rotor increases.
You might also like to view...
Pinion preload is being set on a pinion using a collapsible spacer. After tightening the pinion nut the preload exceeds the specification by 20 inch pounds. What should the technician do?
A) Loosen the nut until the proper preload is measured B) Leave the nut in place, since the bearings will "wear in" C) Replace the bearings and start over D) Replace the spacer and repeat the adjustment
Which of the following is of greatest concern to food processing companies?
A) Food spoilage microbes B) Food-borne pathogens
If the suction valves are broken, what is the most likely cause of this type of damage?
a. Slugging b. Flooding c. Starving d. Overheating
Technician A says a dial indicator should be used to check tire and wheel lateral runout. Technician B says a dial indicator should be used to check tire and wheel radial runout. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B