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MAHATRANSCO AE Recruitment 2017- Electrical Quiz 24

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Question 1

A 3-phase transmission line is shown in the figure:

Voltage drop across the transmission line is given by the following equation:

Shunt capacitance of the line can be neglected. If the line has positive sequence impedance of 15Ω and zero sequence impedance of 48Ω, then the values of Z_s and Z_m will be

Question 2

The sequence components of the fault current are as follows: I_positive = j 1.5 pu, I_negative = –j 0.5 pu, I_zero = –j 1 pu. The type of fault in the system is

Question 3

Thyristor are used in HVDC transmission just to improve:

Question 4

A power system consists of 2 areas (Area 1 and Area 2) connected by a single tie line. It is required to carry out a load flow study on this system. While entering the network data, the tie-line data (connectivity and parameters) is inadvertently left out. If the load flow program is run with this incomplete data

Question 5

An HVDC link consists of rectifier, inverter transmission line and other equipments. Which one of the following is true for this link?

Question 6

In case of short distance transmission lines, ___________relay is preferred.

Question 7

A generator is connected through a 20 MVA, 13.8/138 kV step down transformer, to a transmission line. At the receiving end of the line a load is supplied through a step down transformer pf 10 MVA, 138/69 kV rating. A 0.72 pu load evaluated on load side transformed rating as base values, is supplied from the above system. For system base values of 10 MVA and 69 kV in load circuit, the value of the load (in per unit) in generator circuit will be

Question 8

For a fixed value of complex power flow in a transmission line having a sending end voltage V, the real power loss will be proportional to

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ESE & GATE EE Power Systems

May 1ESE & GATE EE