• Choose the correct answer:1. These substations are usually located at the generating stationsa) Stepdown PSsb) Step-up PSSc) Isolating PSSd) Distribution PSS2. The reason to rise the voltage for transmission is to:a) Increase losses in transmissionb) Decrease losses in transformersc) Increase efficiency of transmissiond) Increase efficiency of generation3. Ionization coefficients a, y are functions ofa) Ratio of electric field to pressb) Applied voltagec) Pressure and temperatured) Electric field4. A negative ion gives up its extra electron is:a) photo ionizationb) simple collision ionizationc) Electron detachmentd) Electron Attachment5. The electric field E, in a gas bubble immersed in a liquid of permittivity &, is givenby:3€1EOа) Еь%3Db) Еb2€1+€13E1 Eo%3|2€1+1c) E, = 1.4 ()r³(E1-€2) F.dEd) Ep%3DE1-282dx6. Formation of a permanent conducting path across a surface of solid insulation iscalled as:a) Trackingb) Flashoverc) Oxidationd) Erosion

In a power system, power generated in power station is to be transmitted to load(consumers). When…

• Choose the correct answer: 1. These substations are usually located at the generating stations a) Stepdown PSs b) Step-up PSS c) Isolating PSS d) Distribution PSS The reason to rise the voltage for transmission is to:

• Choose the correct answer: 1. These substations are usually located at the generating stations a) Stepdown PSs b) Step-up PSS c) Isolating PSS d) Distribution PSS The reason to rise the voltage for transmission is to:

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

Distribution System

The final stage in the delivery of the electric power is the electric power distribution system. From the transmission system to the individual customers it carries electricity. The distribution system is connected with the transmission system and is used to lower the voltage of the transmission to medium voltage in the range of 2 kV to 35 kV with the help of transformers. This medium voltage to the distribution transformers located near the customer's premises is carried by the primary distribution system lines. These distribution transformers in turn lower the voltage to utilization voltage used in lightings, household appliances, industrial equipments etc. Through secondary distribution lines often several customers are supplied from one transformer. It is through service drops, the commercial and residential customers are connected to the secondary distribution system lines. Customers who demand a larger amount of power can be connected directly to the primary distribution system level or the sub-transmission level.

Question

• Choose the correct answer:
1. These substations are usually located at the generating stations
a) Stepdown PSs
b) Step-up PSS
c) Isolating PSS
d) Distribution PSS
2. The reason to rise the voltage for transmission is to:
a) Increase losses in transmission
b) Decrease losses in transformers
c) Increase efficiency of transmission
d) Increase efficiency of generation
3. Ionization coefficients a, y are functions of
a) Ratio of electric field to press
b) Applied voltage
c) Pressure and temperature
d) Electric field
4. A negative ion gives up its extra electron is:
a) photo ionization
b) simple collision ionization
c) Electron detachment
d) Electron Attachment
5. The electric field E, in a gas bubble immersed in a liquid of permittivity &, is given
by:
3€1EO
а) Еь
%3D
b) Еb
2€1+€1
3E1 Eo
%3|
2€1+1
c) E, = 1.4 ()
r³(E1-€2) F.
dE
d) Ep
%3D
E1-282
dx
6. Formation of a permanent conducting path across a surface of solid insulation is
called as:
a) Tracking
b) Flashover
c) Oxidation
d) Erosion

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