Electrical Engg (EEE) - MCQ Practice Questions

In a 400 kV transmission line, if the sending end voltage is 400 kV and receiving end voltage drops to 380 kV, what is the percentage voltage regulation?

Which of the following is NOT a component of the Indian National Load Despatch Centre (NLDC)?

A synchronous generator has a subtransient reactance (X''d) of 0.15 pu and transient reactance (X'd) of 0.25 pu. During a three-phase fault, which reactance is used for the initial fault current calculation?

As per IEEE 1588-2019 standard, what is the typical accuracy of a Phasor Measurement Unit (PMU) for frequency measurement in power systems?

In load flow analysis, if a bus is specified with PV (constant voltage and active power), what variable is calculated?

A 132 kV transmission line has a shunt capacitance of 0.008 µF/km and length of 200 km. Calculate the total reactive power generated by the line capacitance at steady state (assuming 132 kV operating voltage).

Which protection scheme is mandated for inter-state transmission lines in India according to Grid Code 2023?

In the context of transient stability, a generator loses synchronism when:

A capacitor bank rated 50 MVAR at 400 kV is to be switched in a power system. Which device is most suitable for controlled switching to avoid transient overvoltages?

In the Indian power system, the frequency regulation bandwidth for Load Frequency Control (LFC) is typically maintained within:

Which of the following correctly represents the relationship between the steady-state stability limit and transient stability limit?

A 50 MW, 11 kV, 50 Hz synchronous generator has an inertia constant H = 6 seconds. Calculate the kinetic energy stored in the rotor at rated speed.

In a multi-machine power system stability study, which parameter is used to measure relative rotor angle instability between two generators?

A STATCOM (Static Synchronous Compensator) is installed in a 220 kV network. In what mode should it operate to provide reactive power support during a voltage sag?

In selective coordination of protective devices, what is the minimum time interval required between the operation of primary and backup fuses as per Indian standards?

Which type of power system stability is primarily concerned with the system's ability to maintain synchronism after a small disturbance?

In the Indian grid, renewable energy penetration targets for 2024-2025 (non-hydro) approximately target what percentage of total generation capacity?

A transmission line is protected by a distance relay set with Zone 2 reach at 80% of line length. If the line is 150 km and has impedance of 0.4 Ω/km, what is the Zone 2 reach impedance?

Which of the following voltage levels is NOT part of the Indian transmission network classification?

In a power system experiencing voltage instability, the reactive power support margin becomes critical. At what reactive power reserve margin should emergency measures be initiated according to Indian Grid Code?