In case-the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be______________?

Flywheel is used with D.C. compound motor to reduce the peak demand by the motor, compound motor will have to be_____________?

A. level compounded
B. under compounded
C. cumulatively compounded
D. differentially compounded

If the supply voltage for a D.C. motor is increased, which of the following will decrease ?

A. Starting torque
B. Operating speed
C. Full-load current
D. All of the above

For the same H.P. rating and full load speed, following motor has poor starting torque_____________?

A. shunt
B. series
C. differentially compounded
D. cumulativelyc’ompounded

In a manual shunt motor starter?

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

Speed control by Ward Leonard method gives uniform speed variation_____________?

A. in one direction
B. in both directions
C. below normal speed only
D. above normal speed only

D.C. generators are normally designed for maximum efficiency around_____________?

A. full-load
B. rated r.p.m.
C. rated voltage
D. all of the above