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Electrical Machines
In DC shunt motor if load is increased, the speed
increase proportional.
reduce slightly.
increased slightly.
remains constant.
increase proportional.
reduce slightly.
increased slightly.
remains constant.
Answer
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Related Question
Electrical Machines
Diverters are used only in
shunt motors
series motors
None of these
either of these
shunt motors
series motors
None of these
either of these
Answer
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Electrical Machines
A compound dc generator is delivering full load current at a terminal voltage of 230 V. Its series-field winding gets short circuited. If its terminal voltage 1. becomes more than 230 V, it is overcompounded generator 2. becomes more than 230 V, it is differentially compounded generator 3. becomes less than 230 V, it is overcompounded generator 4. becomes less than 230 V, it is differentially compounded generator 5. becomes less than 230 V, it is level compounded generator From these, the correct answer is
1, 4
2,3
2, 3, 5
1, 4, 5
1, 4
2,3
2, 3, 5
1, 4, 5
Answer
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Electrical Machines
If iron loss and full load copper loss of any transformer are denoted by Pi and Pc, then the load corresponding to maximum efficiency is given by
(Pi / Pc)1.6 × full Load.
(Pi / Pc) × full Load.
(Pi / Pc)0.5 × Full Load.
(Pi / Pc)2 × full Load.
(Pi / Pc)1.6 × full Load.
(Pi / Pc) × full Load.
(Pi / Pc)0.5 × Full Load.
(Pi / Pc)2 × full Load.
Answer
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Electrical Machines
In a Dc generator the magnetic neutral axis coincide with geometrical neutral axis, when
the generator runs on overload.
the generator runs on designed speed.
there is no load on the generator.
the generator runs on full load.
the generator runs on overload.
the generator runs on designed speed.
there is no load on the generator.
the generator runs on full load.
Answer
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Electrical Machines
Value of specific electric loading of Induction motor is in the range of
400 - 4000 ampere conductor / metre.
30000 - 100000 ampere conductor / metre.
5000 - 45000 ampere conductor / metre.
40 - 400 ampere conductor / metre.
400 - 4000 ampere conductor / metre.
30000 - 100000 ampere conductor / metre.
5000 - 45000 ampere conductor / metre.
40 - 400 ampere conductor / metre.
Answer
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