Power Systems Objective Questions & Answers – Set 4

Specified quantities of load bus are

Advantages of shunt compensation is/are

For some given transmission line the expression for voltage regulation is given by (Vs - Vr)/Vr *100%. Hence,

The charging reactance of 50 km transmission line is 1500 Ω. What is the charging reactance for 100 km length of line?

Communications lines are treated as

A 1-phase transmission line has an impedance (3+4j) Ω . Find the power factor of the load for achieving maximum and zero voltage regulation?

Surge impedance loading of a 3-phase, 400 kV transmission line is 400 Ω. The surge impedance loading is

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

A 1-phase transmission line has an impedance (4 + 3j ) Ω. Find the power factor of the load for zero voltage regulation?

A transmission line has 50 km operating at frequency of 500 Hz. Find the type of the line?

Which of the following statements is/are true

The ABCD constants of a 3-phase 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

The capacitance of an overhead transmission line increases with

Condition for zero voltage regulation is

Condition for maximum voltage regulation

Which of the following transmission line is most practically used in load flow analysis?

Installation of capacitors at suitable locations and of optimum size in a distribution system results in

Transmission line parameters of the short transmission line are

In which of the following transmission lines capacitance effect is negligible?

If the rated receiving end voltage is 33 kV, then what are the limits for safe operation of equipments?

Zero voltage regulation is possible only for

A 1-phase transmission line has an impedance (4 + 3j ) Ω. Find the power factor of the load for zero voltage regulation?

For transmission line which one of the following relation is true?

Surge impedance loading of a transmission line can be increased by

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?

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?

A 3-phase 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

Under excited Synchronous phase modifier works as

A transmission line has 200 km operating at frequency of 10 Hz Hz. Find the type of the line

Ferranti effect occurs under