Three phase voltage is created by:
a. having a reversible rotor
b. having a stator with three sets of windings
c. having a rotor with three sets of windings d. rectifying the single phase output
B
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Locations in which flammable gases or vapors may be present in the air in quantities sufficient to produce explosive or ignitable mixtures are identified as _____.
a. Class I locations b. Class II locations c. Class III locations d. Class IV locations
The issue of runaway slaves was important to most southerners because
A. the South was losing a significant and irreplaceable portion of its labor force. B. the overwhelming success of the Underground Railroad posed critical and immediate threat to the southern way of life. C. while the overall loss of property was relatively insignificant, the loss of honor and the passing of moral judgments by northerners were felt more. D. escaped slaves would likely organize a black army to stage armed rebellions against white southern planters and their plantations. E. escaped slaves would travel north or to Canada and quickly undermine the legitimacy of southerners' racial superiority theories among political leaders of the North and the South.
Answer the following statement(s) true (T) or false (F)
1.The skill of your laborers can influence the amount you bid for a project. 2.Wattles should be placed in a shallow concave trench. 3.Soil is a lifeless component of a site and can be manipulated without regard to the health or condition of the soil. 4.To reduce problems with corrosion, DC wire connections should be made in waterproof wire nuts. 5.Valves can be placed at locations around the site or together at one site.
How is the water from the melting frost removed during an automatic defrost?
What will be an ideal response?