Explain how the direction of current flow determines the number of poles.
What will be an ideal response?
If the current travels in the same direction through two pole pieces, both produce the same magnetic polarity and are essentially one pole piece. If the current direction is opposite through each pole piece, they produce opposite magnetic polarities and are essentially two poles.
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The current ratings for ____________________ phase AC motors are given in Table 430.248.
Fill in the blank(s) with the appropriate word(s).
Assume you needed $10 000 on April 1, 2016, and two options were available:
(a) Your banker would lend you the money at an annual interest rate of 7.0 percent, compounded monthly, to be repaid on September 1, 2016. (b) You could cash in a certificate of deposit (CD) that was purchased earlier. The cost of the CD purchased September 1, 2015, was $10 000. If left in the savings and loan company until September 1, 2016, the CD’s annual interest is 3.8 percent compounded monthly. If the CD is cashed in before September 1, 2016, you lose all interest for the first three months and the interest rate is reduced to 1.9 percent, compounded monthly, after the first three months. Which option is better and by how much? (Assume an annual rate of 3.6 percent, compounded monthly, for any funds for which an interest rate is not specified.)
Why is it important that the same force be used when tightening nuts and bolts on compressors?
What will be an ideal response?
A power steering pump has the specified pressure with the pressure gauge valve closed. However, with this valve open, the pump does not have the specified pressure difference between the pressure readings at 1 , 000 and 3 , 000 rpm . The cause of this problem could be:
What will be an ideal response?