Synopsis of Electrical Engineering

Important multiple choice questions in Power systems 1.        The good effect of corona on overhead lines is to A)      Increase the line carrying capacity due to conducting ionized air envelop around the conductor B)       Increase the power factor due to corona loss C)       Reduce the radio interference from the conductor D)      Reduce the steepness of surge fronts 2.        The principal information obtained from load flow studies in a power system are                                             I.             Magnitude and phase angle of the voltage at each bus                                           II.             Reactive and real power flows in each of the lines                                         III.             Total power loss in the network                                         IV.             Transient stability limit of the system Select the correct answer using the codes given below: A)      1 and 2 B)       3 and 4 C)      

Important multiple choice questions in Power systems 1.        In pump storage hydropower plant, the electrical machine is made to work alternately as generator and motor. The efficiency of the generator working at the same electrical power level is A)      Greater than that as motor B)       Equal to that as motor C)       Less than that as motor D)      Greater or less than that as motor depending on the type of machine 2.        In a thermal nuclear reactor                                 I.             The purpose of moderator is to slowdown fast neutrons produced due to fusion.                               II.             The moderator material must have low molecular weight.                             III.             Ordinary water can be used as moderator with natural uranium as fuel.                             IV.             The multiplication factor is kept slightly greater than unity during its normal functioning. Which of these statements are