In a diaphragm-type expansion tank, since the diaphragm separates the fluid from the air, the air ____ the fluid.
a. cools
b. easily combines with
c. is proportional to
d. cannot be reabsorbed by
d. cannot be reabsorbed by
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Which of the following protect the motor and control devices against overheating?
a. Solid-state overload relays b. Solid-state relays c. Timing relays d. Thyristors
What plant should be pruned in the early spring?
A) Roses B) Hemlock C) Holly D) Azalea
At least ____ inches of free conductor shall be left at each outlet, junction, and switch point.
A. 6 B. 8 C. 12 D. 18
The idler gear _____________.
A. is used primarily to change the direction of a gear train's output B. is the gear tied to the gear train's output C. is a gear set with multiple gears on one shaft D. is the gear that supplies power to the gear train, often tied to a motor