A widely accepted practice is to identify 3-phase ungrounded (hot) conductors as ____ in 208/120 volt, 4-wire, wye-connected systems.
A. yellow, green, and blue
B. black, red, and blue
C. red, yellow, and green
D. black, red, and white
Answer: B
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What statement could be made concerning the phase angle in a circuit containing a small resistor and a large inductive reactance?
A. The phase angle will be 0°. B. The phase angle will be greater than 0° but less than 45°. C. The phase angle will be greater than 45° but less than 90°. D. The phase angle will be 90°.
Use the accompanying figure to compute angle A to the nearest hundredth of a degree. Angle B = 14o and angle C = 30o.
What will be an ideal response?
A _____ is a material that can produce a cancerous tumor
a. tumor c. toxin b. carcinogen d. chemical
____ respirators are air-purifying respirators that use a blower to force the ambient air through air-purifying elements to the inlet covering.
A. Air-purifying B. Atmosphere-supplying C. Powered air-purifying D. Supplied-air