When does the blower on an electric furnace operate?
A) The blower operates whenever the last heating element is energized.
B) The blower operates independently of the heating elements.
C) The blower operates whenever any of the heating elements are energized.
D) The blower operates when the first heating element is energized.
C
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What will be an ideal response?
It is possible to control a motor from as many places as there are stations using ____.
a. normally closed contacts b. the red pilot light c. a pushed closed contact d. the same magnetic controller
____ result(s) when gas that was dissolved in the molten weld pool forms bubbles that are trapped as the metal cools to become solid.
A. Porosity B. Inclusions C. Incomplete fusion D. Laminations
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