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. Medium4. 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 0.8pu load. The operating power (torque) angle 8° is:a. 6°=36 elec. deg.b. 8°= 23.57 elec. deg.c. 8°-40 elec. deg.

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

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Concept explainers

Three Phase Induction Motor

The induction motor is an electric motor that runs on AC (alternating current) and it is of two type single phase motor that work on single-phase power supply and three-phase motor that work on three-phase power supply.

Question

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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