The speed of a DC motor that requires a constant torque is controlled by adjusting the __________.

A. field current and keeping the armature voltage constant
B. armature voltage and keeping the field current constant
C. armature voltage and the field current


Answer: B

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Answer the following statement true (T) or false (F)

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What do the letter "T" and the letter "H" following the four digit designation for aluminum represent?

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If an air-cooled condenser is located on a 95°F roof and the condenser saturation temperature is 150°F, which of the following is a possible scenario?

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