Solid-state reduced-voltage controllers provide smooth, stepless acceleration of a motor through the use of silicon-controlled _____________________.
Fill in the blank(s) with the appropriate word(s).
rectifiers
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Alternative A has a rate of return of 14% and alternative B has a rate of return of 17%. If the investment required in B is larger than that required for A, the rate of return on the increment of investment between A and B is: (choose one)
(a) Larger than 14% (b) Larger than 17% (c) Between 14% and 17% (d) Smaller than 14%
Technician A says that cooling fans are designed to draw air through the radiator to aid in the heat transfer process. Technician B says that drawing the heat from the coolant transfers this heat to the outside air through the radiator. Which technician is correct?
A) Technician A B) Technician B C) Both technicians D) Neither technician
Some short interval schedules are prepared with one week of information looking back (work performed the prior week) and two or three weeks looking forward. Discuss the value or use that the information contained in the "looking back" portion of the short interval schedule can serve
What will be an ideal response?
Which of the following is an advantage of a semiconductor switch over a mechanical relay?
A) can handle high current B) high speed C) total isolation between source and output D) high speed and total isolation between source and output