Answer the following statement(s) true (T) or false (F)
1. Supplying reactive power locally leads to increased line current, thus increased line losses.
2. When a three-phase system is delta-connected, the phase currents equal the line currents.
3. Excepting a few small isolated systems, the electric grid in North America consists of a single large 4. synchronous 60 Hz system.
4. The total real power losses of an ideal transformer are always zero.
5. Transposition of high voltage transmission lines, particularly those operating at over 345 kV, is practically always done on every transmission line to keep the system blanced.
1. False
2. False
3. False
4. True
5. False
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Answer the following statements true (T) or false (F)
1. A rectangular area of building that is bounded on all three sides by exterior walls, on the fourth side by a fire barrier, and with fire-rated floors above and below, may be treated as a fire area. 2. Compared to a lightweight building element, a heavyweight element is generally a poor transmitter of airborne sound. 3. A resilient clip consists of a small light-gauge steel member with a rubber pad fastened to it. 4. A resilient channel is used to attenuate airborne sound, whereas a resilient clip is used to attenuate structure -borne sound. 5. A seismic joint is generally similar to a building expansion joint but smaller in width.
Which of the following is considered part of aquaculture?
a. Mollusks c. Amphibians b. Reptiles d. All answers
A(n) ____ is a condition when, due to the limits of dimensions, there is always a clearance between mating parts.
A. interference fit B. running fit C. locational fit D. force fit E. none of the above
The circuit of Figure P11.20 is a source-follower amplifier.
