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1) What is the result of frequency instability? a. Voltage collapse b. Frequency swings c. Tripping of generating units d. Both (b) and (c) e. All of these
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2) What does the swing equation describe? a. The relative motion of rotor with the field windings of the machine b. The relative motion of the rotor with respect to stator field as a function of time. c. The relative motion of stator field with the rated frequency of the machine d. The performance curve of the machine
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3) Which among the following is / are used for the solution of load flow using FDLF method? a. [(Δ P) / E] = [B' ] [Δ δ] b. [(Δ Q) / E] = [B" ] [ Δ E] c. [(Δ P) / E] = [B" ] [ Δ δ] d. Both (a) and (b) e. All of these
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4) What type of convergence takes place in NR method? a. Linear convergence b. Geometric convergence c. Quadratic convergence d. All of these e. None of these
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5) For what studies are the FDLF method used? a. Optimisation studies b. Multiple load flow studies c. Small size systems d. Both (a) and (b) e. All of these
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6) Which among the following methods are highly accurate? a. Gauss Seidel method b. Newton Raphson method c. Fast decoupled low flow method d. All of these e. None of these
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7) Which among the following factors influence the cost of generation of electric power? a. Generator efficiency b. Fuel cost c. Transmission losses d. All of these e. None of these
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8) For economic measure the generators at a power plant operate at _____________. a. Equal incremental cost b. Equal loads c. Equal power rating d. All of these e. None of these
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9) What is / are the major assumptions made in the calculation of swing equations? a. Damper windings are neglected b. The machine is lossless c. The machine has to run at synchronous speed d. Both (a) and (b) e. All of these
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10) What kind of differential equation is swing equation? a. Linear second order b. Non linear first order c. Linear first order d. Non linear second order
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