Why might a technician need to install a larger transformer in a heating system?
A) if the furnace wire size is incorrect B) if performing regular maintenance
C) if output from the system is decreasing D) if cooling is added to an existing furnace
D
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Each of three equal capacitors in series has _____.
a. one-third the applied voltage b. the original value of the applied voltage c. twice the applied voltage d. three times the applied voltage
Technician A says that a pilot is placed into the valve guide to position the stone or cutter correctly for resurfacing the valve seat. Technician B says that he installed height should be checked and corrected with oversized valves, if needed. Who is right?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
The three general types of materials used in electrical control systems are:
A) Wire, electrical tape, and batteries. B) Conductors, semiconductors, and nonconductors. C) Protons, electrons, and neutrons. D) Wood, concrete, and oil.
Soot forming in the heat exchanger can be caused by
A) the presence of coal tar in the gas B) Too much gas in the gas air mixture C) Too much air in the gas air mixture D) Excessively high combustion temperatures