a) All the units will be equally loaded b) Feedback is easy c) VAR output of units decreased d) Loading of the units are adjusted t equal incremental fuel costs Ans: (d)
a) Saluting of swing equation b) Critical reclosure time c) Change in frequency errors d) Change in velocity errors Ans: (b)
a) Operating voltage b) Reactance of the lines c) Cross-section of conductor d) None of these Ans: (b)
a) Single machines and infinite bus b) Two machines and infinite bus c) Three machines and infinite bus d) Four machines and infinite bus Ans: (a)
a) It may go out of synchronism b) Speed will cross the rated speed c) It will burn d) It will stop instantaneously Ans: (a)
a) A constant power is flowing b) Frequency is exactly 50 Hz c) There is synchronism between machines and external tie lines d) All of these Ans: (c)
a) Increasing load on the plant b) Decreasing load on the plant c) Keeping load on the plant constant d) None of these Ans: (a)
a) Stability b) Instability c) Steady state stability d) None of these Ans: (b)
a) Increasing generation b) Decreasing generation c) Coordinating with other interconnected systems d) None of these Ans: (c)
a) Fault clearing time b) Strength of transmitting network c) Short circuit ratio of generating unit d) All of these Ans: (d)