In case of a flat compounded generator
speed varies in proportion to the load on the generator
voltage remains constant irrespective of the load
voltage generated is less than the rated voltage
generated voltage is proportional to the load on the generator
voltage remains constant irrespective of the load
Armature reaction in a generator results in
demagnetization of leading pole tip and magnetization of trailing pole tip
demagnetization of trailing pole tip and magnetization of leading pole tip
demagnetizing the center of all poles
magnetizing the center of all poles
demagnetization of leading pole tip and magnetization of trailing pole tip
Wave winding is composed of
that even number which is exact multiple of poles
any odd number of conductors
any even number of conductors
that even number which is exact multiple of poles + 2
that even number which is exact multiple of poles + 2
D.C. series generator is used
to supply traction load
to supply industrial load at constant voltage
voltage at the toad end of the feeder
for none of the above purpose
voltage at the toad end of the feeder
The critical resistance of the D.C. generator is the resistance of
field
load
armature
brushes
field
When two D.C. series generators are running in parallel an equalizer bar is used
so that two similar machines will pass approximately equal currents to the load
to increase the series flux
to increase the speed and hence generated e.m.f.
to reduce the combined effect of ar-mature reaction of both machines
so that two similar machines will pass approximately equal currents to the load
Following D.C. generator will be in a position to build up without any residual magnetism in the poles
compound generator
self-excited generator
series generator
shunt generator
self-excited generator
Which of the following generating machine will offer constant voltage on all loads ?
Level compounded generator .
Self-excited generator
Separately excited generator
All of the above
Level compounded generator .
Which of the following generators will be preferred if they are required to be run in parallel ?
None of the above
Compound generators
Series generators
Shunt generators
Shunt generators
Interpole flux should be sufficient to
neutralise the commutating self induced e.m.f.
neutralise the armature reaction flux
neutralise both the armature reaction flux as well as commutating e.m.f. induced in the coil
perform none of the above functions
neutralise both the armature reaction flux as well as commutating e.m.f. induced in the coil
पोस्ट अच्छी लगी हो तो प्लीज नीचे दिए गए लिंक पर क्लिक कर शेयर जरुर करें
0 Comments