A variable frequency drive is a system for controlling the rotational speed of an electric motor by:
A) Controlling the voltage amplitude supplied to it.
B) Varying the load applied to it.
C) Controlling the frequency of the power supplied to it.
D) Varying the current flow to it.
C
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____ is the traditional method of project delivery that moves sequentially from conception of a project through its construction.
A. Design-Build B. Design-Bid-Build C. Bid-Build D. Design-Bid
Es mejor aplicar los traslapos autoadhesivos _____.
a. por debajo de temperaturas bajo cero b. a temperatura ambiente c. por encima de los 120 °F (48,88 °C) d. entre 120 °F (48,88 °C) y 150 °F (65,55 °C)
The annual worth for years 1 through 8 of the cash flows shown is $30,000. What is the amount of x, the cash flow in year 3, at i = 10% per year? Solve using (a) tabulated factors, and (b) a spreadsheet.
 FIGURE 1.png)
On the oblique drawing the front view appers in its true size and shape, but the other sides are not shown in their trye size and shape because they are drawn at an
A. angle B. line C. shape