Power Systems Objective Questions & Answers – Set 4
Power Systems Objective Questions & Answers
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The capacitance of an overhead transmission line increases with
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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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Under excited Synchronous phase modifier works as
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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 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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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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For some given transmission line the expression for voltage regulation is given by (Vs  Vr)/Vr *100%. Hence,
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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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Advantages of shunt compensation is/are
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Ferranti effect occurs under
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Specified quantities of load bus are
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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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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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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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Condition for zero voltage regulation is
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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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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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Condition for maximum voltage regulation
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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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Communications lines are treated as
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In which of the following transmission lines capacitance effect is negligible?
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Zero voltage regulation is possible only for
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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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Which of the following statements is/are true
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Which of the following transmission line is most practically used in load flow analysis?
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Surge impedance loading of a transmission line can be increased by
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Installation of capacitors at suitable locations and of optimum size in a distribution system results in
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For transmission line which one of the following relation is true?
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Transmission line parameters of the short transmission line are