Emergency generators generally ____________________
A. provide power to the entire building
B. provide power to emergency equipment, emergency lighting and elevators
C. provide power to all equipment as selected by the chief engineer
D. none of the above.
B
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Given that vs(t) = 20 sin(100t - 40°) in Fig. 9.55, determine ix(t).
 FIGURE 1.png)
When performing an initial system check, a TAB technician determines that the total airflow the blower is moving cannot be adjusted to meet design specifications. This could indicate that:
A) There are leaks in the return-side ductwork. B) There is too much restriction in the ductwork. C) There is no air filter installed. D) There are leaks in the supply-side ductwork.
The crankcase heater protects the compressor on startup by:
A) Keeping the oil warm so that it does not become too thick to lubricate properly. B) Vaporizing any liquid refrigerant that may enter the compressor during the OFF-cycle. C) Drying out any water in the oil. D) Providing an extra heat source, making the compressor's job easier.
What term is used to describe the volume of data that can be handled on a data bus?
A. current B. bandwidth C. frequency D. clock pulses