How can a hot water boiler heat water to 250°F and not boil the water?
A) The system is under enough pressure to raise the boiling point above the water temperature in the boiler
B) The water does boil, but the steam is vented to the air
C) Hot water boilers cannot maintain 250°F water without boiling the water
D) Water treatment is added whose primary purpose is to raise the boiling point of the water
A
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Answer the following statement true (T) or false (F)
Which of the following is not an objective of continuous improvement?
a. Satisfy stakeholders b. Perform accurate time studies c. Eliminate waste d. Prevent, not correct
One disadvantage of the tracking A/D converter is ________
A) it requires two counters: one for up and one for down B) the need for a latch and its associated control circuit C) the binary output will oscillate between two binary states when the analog input is constant D) the need for an accurate clock reference for the counter
What changes mechanical energy to electrical energy?
A. motor B. magnet C. generator D. voltage