Category: D.C. Generators

A. 2 : 3
B. 3 : 1
C. 3 : 2
D. 1 : 3

A. 4
B. 8
C. 16
D. 32

A. to reduce eddy current losses
B. to enhance flux density
C. to amplify voltage
D. to provide mechanical balance for the rotor

A. speed
B. load
C. voltage
D. speed and voltage

A. Compensating winding in a D.C. machine helps in commutation
B. In a D. C. generator interpoles winding is connected in series with the armature winding
C. Back pitch and front pitch are both odd and approximately equal to the pole pitch
D. Equilizing bus bars are used with parallel running of D.C. shunt gen¬erators

A. severe sparking
B. rough commutator surface
C. imperfect contact
D. any of the above

A. length of conductor
B. cross-sectional area of the conductor
C. number of conductors
D. all of the above

A. brushes should be of proper grade and size
B. brushes should smoothly run in the holders
C. smooth, concentric commutator properly undercut
D. all of the above

A. number of armature coils
B. number of armature coil sides
C. number of armature conductors
D. number of armature turns

A. lap winding
B. wave moving
C. duplex winding
D. any of the above