DC GENERATORS QUIZ

Any odd number of conductors

That even number which is exact multiple of poles

Any even number of conductors

That even number which is exact multiple of poles + 2

Number of coils

Twice the number of poles

None of the listed here

Numbers of conductors

Less than 150 V

150 V

None of these

Greater than 150 V

To increase the generated e.m.f.

To reduce the combined effect of armature reaction of both the machines

So that the two identical machines will pass approximately equal currents to the load

To increase the series flux

Interpole windings

Equalisers

Compensating windings

Copper brushes

Both of the listed here

Identified by the scarring of the commutator segment to which open circuited coil is connected

None of these

Indicated by a spark completely around the commutator

Silocon steel

Soft iron

Wrought iron

Cast steel

Ball bearings

Magnetic bearings

Needle bearings

Bush bearings

Both electrical and magnetic fields

None of the listed here

Magnetic field

Electric field

Double the number of poles

Same as the number of poles

Two

Half the number of poles