An isolated synchronous generator with transient reactance equal to 0.1 pu on a 100 MVA base is connected to the high voltage bus through a step up transformer of reactance 0.1 pu on a 100 MVA base. The fault level at the bus is 100 MVA 500 MVA 200 MVA 400 MVA TRUE ANSWER : ? YOUR ANSWER : ?
How to find the total number of strands (N) when number of layers (x) are given Total number of strands N = 3x² + 3x + 1 Total number of strands N = 3x² + 3x - 1 Total number of strands N = 3x² - 3x - 1 Total number of strands N = 3x² - 3x + 1 TRUE ANSWER : ? YOUR ANSWER : ?
A thermal generating station has an installed capacity of 15 MW and supplies a daily load of 10 MW for 12 hours and 5 MW for remaining 12 hours. If the load factor is 0.8. Find the reserve capacity of the station? 9 MW 18 MW 5 MW 10 MW TRUE ANSWER : ? YOUR ANSWER : ?
An impulse turbine makes use of a draft tube. operates by initial complete conversion to kinetic energy. always operates submerged. is most suited for low head and high discharge power plants. TRUE ANSWER : ? YOUR ANSWER : ?
If skin depth is more, then skin effect is more None of these less either 1 or 2 TRUE ANSWER : ? YOUR ANSWER : ?
In case of failure of prime mover of the generator, which type of relay is used? distance relays impedance relay offset mho relay reverse power relay TRUE ANSWER : ? YOUR ANSWER : ?
String chart is drawn between nether 1 nor 2 both 1 and 2 T on Y-axis and S and T on on X-axis temperature (T) on X- axis, sag(S) and tension (T) on Y-axis TRUE ANSWER : ? YOUR ANSWER : ?
Two insulator discs of identical capacitance value C make up a string for a 22 kV, 50 Hz, single phase overhead line insulation system. If pin to earth capacitance is also C, then find the string efficiency? 86%% 50% 90% 75% TRUE ANSWER : ? YOUR ANSWER : ?
In Francis turbine runner, the number blades is usually of the order of 12 - 14. 3 - 6. 6 - 8. 16 - 24. TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is/are the disadvantages of phase modifiers? Initial cost of synchronous phase modifier is higher It requires more maintenance because of running equipment All of these It consumes both active and reactive power TRUE ANSWER : ? YOUR ANSWER : ?