A wound rotor motor has been recently put back into service but is now rotating in the wrong direction. After
examining the motor, you find that lead L1 is connected to T2, L2 to T3, and L3 to T1 . To correct the rotation,
you should:
a. Connect L2 to T1, L3 to T2, and L1 to T3.
b. Connect L1 to T1, L2 to T3, and L3 to T2.
c. Connect L1 to T1, L2 to T2, and L3 to T3.
d. Reverse phase connections between the wound rotor and the resistor bank.
b
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A. 25 to 30 B. 35 to 60 C. 50 to 65 D. 70 to 95
Low pressure chillers use either air- or water-cooled condensers.
Answer the following statement true (T) or false (F)
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Fill in the blank(s) with the appropriate word(s).
The subsequent problems deal with the figure and table below
For a Type J (Iron-Constantan) thermocouple configuration (as shown above) with a 0°C reference (Tref):
where Vemf is the voltage difference produced by the junction pair (Vemf = VA ? VB in the figure).Assume that nodes A and B are at the same temperature, unless indicated otherwise. Assume that the op amp is ideal.If the iron wire leads connected at A and B were switched (i.e., connect the lower iron wire to A instead of B and connect the upper iron wire to B
instead of A), the output Vout would? A. reverse sign B. oscillate wildly C. become zero D. not change E. become infinite