Related Questions

The winding where dummy coils are used is sometimes called
A Duplex winding
B Triplex winding
C Forced winding
D None of the above
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 field coils of D.C. generator are usually made of
A Mica
B Copper
C Cast iron
D Carbon
A dummy activity in a net work diagram
A Is represented by a dotted line
B Is an artificial activity
C Does not consume time or resources
D All of these
A dummy activity
A Is artificially introduced
B Is represented by a dotted line
C Does not require any time
D All of the above
Dummy coil should not be used in
A small machines
B large machines
C either (A) or (B)
D none of the above
Dummy activities are used to
A Determine the critical path
B Determine the project completion time
C Maintain the required net work
D None of these
A dummy activity is used in PERT network to describe the
A Precedence relationship
B Resource idleness
C Resource restriction
D Necessary time delay
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

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