a) Increases b) Decreases c) Will not change d) Will increase proportionately Ans: (b)
a) Proportional to the square of the operating voltage b) Inversely proportional to the voltage c) Proportional to the voltage d) Inversely proportional to the square of the voltage Ans: (a)
a) true b) false Ans: (a)
a) Thermal power plant b) Hydro-electric power plant c) Atomic Reactor d) MHD Ans: (c)
a) true b) false Ans: (a)
a) It is easy to fabricate thin conductors and combine them to make a bundle b) Overall inductance of the line is reduced and corona loss and radio influences are minimum c) Height of the tower is reduced and hence cheap transmission d) Fabrication of the conductor is cheap e) Of erection difficulties Ans: (b)
a) true b) false Ans: (a)
a) The percentage of the ratio of change in reactance in transient condition to the total reactance of the machine b) The percentage of the ratio of change in reactance in transient condition of the total resistance of the machine c) The percentage of the ratio of voltage drop due to reactance synchronous machine to the rated voltage when full load rating current is flowing d) Either (a) and (c) Ans: (c)
a) 4 times of the full load current b) 25 times of the full load current c) 2 times of the full load current d) 8 times of the full load current e) 40 times of the full load current Ans: (b)
a) A 4% reactance b) A 40% reactance c) A 16% reactance d) A 20% reactance Ans: (b)