Power Systems Objective Questions & Answers – Set 4
Power Systems Objective Questions & Answers
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A transmission line has 50 km operating at frequency of 500 Hz. Find the type of the line?
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The capacitance of an overhead transmission line increases with
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Advantages of shunt compensation is/are
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Installation of capacitors at suitable locations and of optimum size in a distribution system results in
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If transmission line parameters A and B are 0.9∠0° and 200∠90° respectively. Find the shunt reactor required to compensate the ferranti effect?
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A transmission line has 200 km operating at frequency of 10 Hz Hz. Find the type of the line
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A 1phase transmission line has an impedance (3+4j) Ω . Find the power factor of the load for achieving maximum and zero voltage regulation?
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Which of the following transmission line is most practically used in load flow analysis?
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Transmission line parameters of the short transmission line are
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If the rated receiving end voltage is 33 kV, then what are the limits for safe operation of equipments?
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In which of the following transmission lines capacitance effect is negligible?
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Specified quantities of load bus are
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Zero voltage regulation is possible only for
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Transmission line has a length of 300 km, operating at sending end voltage V_{s} = 1 pu, find the receiving end voltage(V_{r}) at no load?
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Condition for zero voltage regulation is
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For transmission line which one of the following relation is true?
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The charging reactance of 50 km transmission line is 1500 Ω. What is the charging reactance for 100 km length of line?
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A 3phase transmission line has its conductors at the corners of an equilateral triangle with side 3m. The diameter of each conductor is 1.63 cm. The inductance of the line per phase per km is
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Surge impedance loading of a transmission line can be increased by
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Under excited Synchronous phase modifier works as
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Ferranti effect occurs under
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Surge impedance loading of a 3phase, 400 kV transmission line is 400 Ω. The surge impedance loading is
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For some given transmission line the expression for voltage regulation is given by (Vs  Vr)/Vr *100%. Hence,
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A transmission line has an impedance of (2+j6) Ω has voltage regulation of 10% at a load power factor of 0.8 lag. Find the voltage regulation for a load of 0.6 lead
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Communications lines are treated as
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Condition for maximum voltage regulation
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A 1phase transmission line has an impedance (4 + 3j ) Ω. Find the power factor of the load for zero voltage regulation?
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The ABCD constants of a 3phase transmission line are A = D = 0.8∠1°, B = 170∠85° Ω , C = 0.002∠90.4° §. The sending end voltage is 400 kV. The receiving end voltage under no load condition is
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A 1phase transmission line has an impedance (4 + 3j ) Ω. Find the power factor of the load for zero voltage regulation?