The interrupting rating of an FH-type circuit breaker is _____.
a. 5,000A
b. 10,000A
c. 30,000A
d. 65,000A
d. 65,000A
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The formula for center-to-center length of each segment of a mitered turn is _____.
a. radius times 2 b. diameter times 2 c. 2 times radius times tangent of miter d. 2 times tangent of miter
The percentage of air that travels through a tube-and-fin coil without touching any coil surface is called the:
A) Volumetric efficiency. B) Bypass factor. C) Dilution air percentage. D) Sensible heat ratio.
A manometer is attached to a vacuum pump, which results in unequal pressure between each of the two arms. How is the vacuum measured?
A) A gauge attaches to the bottom of the manometer. B) The movement of fluid in each side is compared. C) The side that is open to the atmosphere is gauged. D) The side that is attached to the vacuum is gauged.
What should the ohmmeter read when the lead probes are touched together?
A. 3 ohms B. 1.5 ohms C. 0.5 ohms D. 0.0 ohms