Alternators of small kilovolt-ampere rating are generally _____-cooled.
A. liquid
B. air
C. hydrogen
D. nitrogen
Answer: B
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Suppose a circuit is designed to turn off a compressor if the pressure in the system reaches a predetermined level. If the pressure becomes high enough to cause the pressure switch contacts to close, ____.
a. the CR relay coil is turned off b. the compressor motor will connected to an auxiliary power line c. a warning light will be turned on d. compressor is automatically restarted by the thermostat
Most of the cheese produced in the United States comes from
What will be an ideal response?
Electric car maker Gentech signed a $75 million contract with Power Systems, Inc. to automate a major part of its assembly line system. If Power Systems will be paid 2 years from now, when the systems are ready, determine the present worth of the contract at 18% per year interest.
What will be an ideal response?
Tank-type water heaters:
A. are the least commonly used. B. are lower in energy loss. C. require a greater equipment footprint. D. have more complex controls.