013: Choose the correct answer: 1. In a symmetrical three phase system the total instantaneous three phase power is: a. Pulsating sinusoidally with frequency o. b. Pulsating sinusoidally with frequency 30. c. Constant.
013: Choose the correct answer: 1. In a symmetrical three phase system the total instantaneous three phase power is: a. Pulsating sinusoidally with frequency o. b. Pulsating sinusoidally with frequency 30. c. Constant.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Transcribed Image Text:013: Choose the correct answer:
1. In a symmetrical three phase system the total instantaneous three phase power is:
a. Pulsating sinusoidally with frequency o.
b. Pulsating sinusoidally with frequency 30.
c. Constant.
2. It is impossible to obtain analytical solutions for the power flow equations,
because:
a. The number of equations is large.
b. The equations are nonlinear.
c. The number of unknown variables in the equations is large.
3. Stability requirements limit the power-handling capability of:
a. Long lines.
b. Short lines.
c. Medium
4. Bundling of conductors in a transmission line reduces the risk for corona. Also,
it:
a. Reduces the sag of the line.
b. Increases the resistance of the line.
c. Increases the transmission capacity.
5. A 50 Hz, turbo generator supplying 40% of its maximum power capability to 0.8
pu load. The operating power (torque) angle 8° is:
a. 6°=36 elec. deg.
b. 8°= 23.57 elec. deg.
c. 8°-40 elec. deg.
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