Give two reasons why the slack (reference) bus is needed for the power flow problem..
What will be an ideal response?
1. We can not specify power (s) for all buses because total generation must balance loads and losses.
2. We need an angle reference bus.
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Establishing Vocational Agriculture in public high schools was the main contribution of which of the following?
A. Land Grant Act of 1862 B. Smith-Lever Act of 1914 C. Smith-Hughes Act of 1917 D. No answers
At what cylinder temperature will oil break down inside a compressor?
What will be an ideal response?
What is the reflected resistance seen by the primary in Figure 14-1 if the turns ratio is 4:1 and IS is 40 mA?
A) 12 k? B) 8 k? C) 4 k? D) 16 k?
What is the maximum safe secondary current for a 40 VA transformer that has a primary voltage of 240 V and a secondary voltage of 24 V?
A) 24 V ÷ 40 VA = 0.6 A B) 240 V ÷ 24 V = 10 A C) 40 VA ÷ 24 V = 1.67 A D) 240 V ÷ 40 VA = 6 A