The formula for total current in a series circuit is ____.
A. IT = IR1 = IR2 = IR3 ...= IRn
B. IT = IR1 + IR2 + IR3 ...+ IRn
C. 1/ IT = 1/IR1 + 1/IR2 + 1/IR3 ...+ 1/IRn
D. IT = IR1 - IR2 - IR3 ...- IRn
Answer: A
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a. right triangle b. equilateral triangle c. binomial triangle d. isosceles triangle
When a nine-lead delta connected motor is wired for high voltage, the phase coils are connected in ____.
a. conjunction b. pairs c. parallel d. series
In platform framing, nonload bearing interior walls, called ____, are framed the same as exterior walls.
A. partitions B. studs C. soles D. frames
As shown in Fig. 12.72, a three-phase four-wire line with a phase voltage of 120 V rms, with a positive phase sequence, supplies a balanced motor load at 260 kVA at 0.85 pf lagging. The motor load is connected to the three main lines marked a, b, and c. In addition, incandescent lamps (unity pf) are connected as follows: 24 kW from line a to the neutral, 15 kW from line b to the neutral, and 9 kW from line c to the neutral.
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