If three-phase transformation is needed and a three-phase transformer of the proper size and turns ratio is not available, three single-phase transformers can be connected to form a _____.

A. three-phase bank
B. wye-delta bank
C. wye bank
D. delta bank


Answer: A

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Discuss why indexes are good only for comparing animals within their own groups.

What will be an ideal response?

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Which of the following is a (are) greenhouse gas(es) contributed to the atmosphere by soils?

A) carbon dioxide B) methane C) nitrous oxides D) all of the above E) none of the above

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Even the most efficient torque converter has a slippage rate of _______

A) 10% to 15% B) 0% to 2% C) 8% to 12% D) 3% to 6%

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Write the differential equations for the systems in Figure E-64, find their impulse responses and determine whether or not they are BIBO stable. For each system and . Then comment on the effect on system BIBO stability of redefining the response.


The eigenvalues are -0.653 and +0.153. We already know the system is BIBO unstable because one of the eigenvalues has a positive real part.



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