What is a low water cut out?
A) it is an operating control that shuts off the boiler at the end of every operating cycle when it senses that the boiler has used up its supply of water
B) it is a safety device that shuts off the boiler if the water level is low
C) it is an operating control that energizes the water fill solenoid at the end of an automatic blow-down cycle
D) it is a hand valve installed near the bottom of the boiler that is used for filling and servicing the boiler
B
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It is not unusual for transistor amplifiers to have a gain of ____.
A. 10 B. 50 C. several hundred D. several thousand
Which of the following data transmission media can handle the most amount of data simultaneously?
A. fiber optics B. copper wire C. microwave D. radio waves
A towel and water or rubbing alcohol should be used to clean the heifer's:
A. eyes B. hooves C. nose D. ears
Synthesis and testing of each piece of the project building blocks:
A) is unnecessary because most subsystems have already been built and tested. B) is necessary for important subsystems but can be avoided for small, easily developed subsystems. C) is necessary at all system levels. D) would require too much time reproving known technology.