Related Questions

A flat-bed plotter uses a pen which moves in two directions across a piece of paper fixed on a flat-bed. Can you tell who controls the movements of this pen?
A microfilm
B microfiche
C film card
D COM
E None of the above
The main factor which leads to unstable parallel operation of flat and over compounded generators is
A their rising voltage characteristics
B unequal number of turns in their series field windings
C unequal speed regulation of their primemovers
D unequal series field resistances
The e.m.f. generated by a shunt wound D.C. generator is E. Now while pole flux remains constant, if the speed of the generator is doubled, the e.m.f. generated will be
A $$\frac{{\text{E}}}{2}$$
B 2E
C Slightly less than E
D E
A separately excited generator as compared to a self-excited generator
A Is amenable to better voltage control
B Is more stable
C Has exciting current independent of load current
D Has all above features
Which of the following components of a D.C, generator plays vital role for providing direct current of a D.C. generator?
A Dummy coils
B Commutator
C Eye bolt
D Equalizer rings
The losses occurring in a D.C. generator are given below. Which loss is likely to have highest proportion at rated load of the generator?
A Hysteresis loss
B Field copper loss
C Armature copper loss
D Eddy current loss
A cumulatively compounded long shunt generator when operating as a motor would be
A Cumulatively compounded long shunt
B Differentially compounded long shunt
C Cumulatively compounded short shunt
D Differentially compounded short shunt
In over compounded generator, full load terminal voltage is
A Almost zero
B Less than no load terminal voltage
C More than no load terminal voltage
D Equal to no-load terminal voltage
In a level compounded D.C. generator, full load terminal voltage is
A Negligibly low
B Equal to no-load terminal voltage
C More than no-load terminal voltage
D Less than no-load terminal voltage
The efficiency of a pressure-velocity compounded impulse turbine is __________ as compared to pressure compounded impulse turbine.
A Same
B Less
C More
D None of these

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