Which D.C. motor will be suitable along with flywheel for intermittent light and heavy loads?
A. Series motor
B. Shunt motor
C. Cumulatively compounded motor
D. Differentially compounded motor
In D.C. motor which of the following can sustain the maximum temperature rise?
A. Slip rings
B. Commutator
C. Field winding
D. Armature winding
To get the speed of D.C, motor below the normal without wastage of electrical energy is used?
A. Ward Leonard control
B. rheostatic control
C. any of the above method
D. none of the above method
For which types of D.C. motor, dynamic braking is generally used ?
A. Shunt motors
B. Series motors
C. Compound motors
D. All of the above
Which of the following load normally needs starting torque more than the rated torque?
A. Blowers
B. Conveyors
C. Air compressors
D. Centrifugal pumps
Which of the following motor has the poorest speed regulation ?
A. Shunt motor
B. Series motor
C. Differential compound motor
D. Cumulative compound motor
Which method of braking is generally used in elevators ?
A. Plugging
B. Regenerative braking
C. Rheostatic braking
D. None of the above