What should you be wary of when coordinating high-voltage fusings?
What will be an ideal response?
Coordination studies require that the time-current characteristic of the different protective devices be compared and that the selection of the proper devices be made accordingly. Problems in the coordination of high-voltage fusing occur most frequently when:
| 1. | circuit breakers are used as secondary protective devices, and |
| 2. | a single main protective device is installed on the secondary side of the transformer. |
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Casting is the end result of a method called:
a. forging b. founding c. machining d. stamping
Potassium is taken up by the plant as K2O
Indicate whether the statement is true or false
In order to test the accuracy of a speedometer, the vehicle is driven on the interstate so the speedometer reports a constant speed of 60 MPH. A passenger measures the time it takes to travel between mile markers, and finds it takes 63 seconds to travel one mile. The current speedometer gear has 20 teeth. Should it be replaced? If so, how many teeth should a new gear have?
What will be an ideal response?
With regard to a transistor, when the base-emitter junction is forward biased and the collector-base junction is reverse biased, operation is
A) at bias B) at cutoff C) in the active region D) at saturation