In a step-down transformer with a 4.16kV primary delta connection and a 480/277V wye secondary, the transformer turns ratio is _____.
a. 5:1
b. 9:1
c. 11:1
d. 15:1
d. 15:1
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What is the minimum total storage volume of air dedicated to brake system requirements of an air brake-equipped trailer?
A. Equal to the total volume of all the brake chambers B. Two times total chamber volume C. Four times total chamber volume D. Eight times total chamber volume
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Find I and V in the circuit of Fig. 2.82.
 FIGURE 1.png)
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Which of the following is not one of the three most common business features or value-added services offered by long distance telephone companies?
A) conference calling B) 800 numbers C) calling cards D) on-hook dialing
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To obtain complete voltage control, the triac, like the SCR, must be ____________________.
Fill in the blank(s) with the appropriate word(s).
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