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Monday, 20 July 2015
Q-Bank_Electrical Power System-1-2150908
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CH:1 Supply System
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1)
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Draw and describe typical one
line diagram for power supply scheme
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2)
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Write down comparison between
A.C. and D.C.
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3)
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Prove different comparison between conductor material in
overhead transmission line & underground transmission line.
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4)
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CH:2 Mechanical Design of Overhead lines
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5)
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Which
are the properties of conductor material? Explain Commonly conductor
materials to be used in overhead transmission line? Why ACSR used in transmission line: Give
your comment.
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6)
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Which
are the properties of line supports? Explain the different line support used
for transmission and distribution line of electric power.
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7)
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What is cause of insulation failure? Explain different
types of insulator to be used in transmission and distribution line. Enlist
the advance insulator to be used in modern power system.
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8)
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Why
the voltage is not uniform over the string of suspension insulator string? Explain
the string efficiency with mathematical expression. Enlist the method of
improving the string efficiency.
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9)
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Define
and calculate sag of overhead transmission line.
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Electrical
Design of Overhead lines
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CH:3 Inductance and resistance of transmission line
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10)
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Derive
the expression of loop inductance of single phase line.
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11)
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Derive
an expression for inductance of 3-phase line when the conductors are
symmetrically placed.
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12)
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Derive an expression for inductance of 3-phase line when
the conductors are Unsymmetrically placed.
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13)
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Explain the term: Self GMD and Mutual GMD. Why it is not
in capacitance calculation.
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Ch :4 Capacitance of transmission line
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14)
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Derive
the expression of capacitance of single phase line.
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15)
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Derive
an expression for capacitance of 3-phase line when the conductors are
symmetrically and Unsymmetrically placed.
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Ch: 5 AC and DC Distribution
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Ø Distribution System General
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16)
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Classified Ac and DC distribution in brief with
application.
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17)
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Comparison between overhead and Underground system.
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18)
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Which are the factors to be consider during distribution
system. Explain connection schemes of different distribution system.
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Ø D.C. Distribution
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19)
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Example:
Dc distributed at one end- 1) Concentrated Loading, 2) Uniformly.
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20)
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Explain D.C. distribution fed at both ends for concentrated
loading.
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21)
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Explain ring main distributor with one example.
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Ø A.C. Distributor
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22)
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How the A.C.
distributor different form D.C. Distributor ? Explain the power factor
of load current design w.r.t. 1) Vs
& Vr, 2) Load voltage itself.
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23)
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Explain the four wire star-connected unbalanced loads.
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Ch: 6 Representation of power system component
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24)
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Explain one-line diagram in brief. What is P. U. system?
Write advantages of per unit system.
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25)
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Explain the Equivalent Circuit model of Synchronous
machine. From the first principal, derive Vt = Ef – Ia (Ra+ jXs) Where Xs =
Xar + Xl. Also draw the equivalent circuit diagram.
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26)
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Explain per unit representation of transformer & three
phase network.
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Ch : 7 Undergrounding cables
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27)
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Draw and Explain construction of underground cable.
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28)
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What are the properties of insulating material of
underground cables? Explain insulating material used for making underground
cables.
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29)
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In which parameter insulating material to be classified. explain
the classification of underground cable with different voltage rating.
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30)
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How 3-phase cable classified with their services. Explain
in brief.
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31)
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Write down the expression for insulation resistance of a
single-core cable.
OR
Show the insulating resistance of cable is inversely
proportional to its length.
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32)
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Give your comment: single core cable consider as
equivalent to two long co-axial cylinders. Derive the expression for
capacitance of single-core cable.
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33)
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What is dielectric stress? Explain dielectric stress in
single-core cable.
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34)
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Explain Most Economical conductor size in a cable.
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35)
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Enlist the method to be used in achieving uniform
dielectric stress in dielectric of cable. Explain in brief.
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36)
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Explain capacitance of 3-Core cable in underground cable.
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Saturday, 18 July 2015
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