D.C. Motors

A. hysteresis loss
B. field copper loss
C. armature copper loss
D. eddy current loss

A. Loss of efficiency
B. Excessive heating of core
C. Increase in terminal voltage
D. Rise in temperature of ventilating air

A. Frequency of magnetic reversals
B. Maximum value of flux density
C. Volume and grade of iron
D. Rate of flow of ventilating air

A. high initial cost
B. high maintenance cost
C. low efficiency at Hght loads
D. all of the above

A. residual magnetism of the generator
B. core losses of motor
C. mechanical losses of motor and generator together
D. all of the above

A. Field control
B. Armature voltage control
C. Shunt armature control
D. Mechanical loading system

A. voltage control method
B. field divertor method
C. field control method
D. armature resistance control method

A. Series motor
B. Shunt motor
C. Cumulatively compounded motor
D. Differentially compounded motor

A. D.C. shunt motor
B. D.C. series motor
C. Induction motor
D. Reluctance motor

A. D.C. shunt motor
B. D.C. series motor
C. Single phase induction motor (split phase start or induction run motor)
D. Reluctance motor
E. Synchronous motor