Computer Programming MCQs

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. High initial cost
B. High maintenance cost
C. Low efficiency at hght loads
D. All of the above

A. Back e.m.f. is less than the applied voltage
B. Back e.m.f. is equal to the applied voltage
C. Back e.m.f. of rotor is more than the applied voltage
D. None of the above

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

A. Hysteresis loss
B. Field copper loss
C. Armature copper loss
D. Eddy current loss

A. Field copper loss
B. Windage loss
C. Armature copper loss
D. None of the above

A. magnetic field
B. active length of the conductor
C. current flow through the conductors
D. number of conductors

A. Trains
B. Cranes
C. Hosits
D. Machine tools

A. Over load relay is connected in series and no volt relay in parallel with the load
B. Over load relay is connected in parallel and no volt relay in series with the load
C. Over load relay and no volt relay are both connected in series with the load
D. Over load relay and no volt relay are both connected in parallel with the load