The ____ is used to connect the CPU to the load.
A. opto-isolator
B. power supply
C. input module
D. output module
Answer: D
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It is possible that lines representing two different surfaces of an object shown in one view would, when shown in another view, appear as one line.
Answer the following statement true (T) or false (F)
Copper granules are bonded to the surface of some architectural shingles to provide _____.
a. ultraviolet protection b. corrosion resistance c. an attractive color d. fungus and algae resistance
Electric heat pump water heaters are more than __________ as efficient as electric resistance water heaters.
a. two times b. three times c. four times d. five times
What might be the problem if there are carbon deposits on the refractory?
A) Defective nozzle B) Cracked heat exchanger C) Defective relay protector D) Improper heat anticipator setting