Q. Torque of a DC series motor is __________

View solution

Q. Practically, at higher values of armature current torque does not follow its relationship with armature current.

View solution

Q. What will happen to a torque, if a DC series motor is accidentally connected to single phase ac supply voltage?

View solution

Q. Differentially compound DC motors are used in applications requiring _______

View solution

Q. Which DC motor is more preferred for elevators?

View solution

Q. Which DC motor is used in shears and punches?

View solution

Q. Which DC motor has got maximum self-loading property?

View solution

Q. For the same H.P. rating and full load speed, which of the following motor has poor starting torque?

View solution

Q. Unlike DC series motor, DC compound motor can be started on no-load.

View solution

Q. Flywheel is used with DC compound motor to reduce the peak demand by the motor, compound motor has to be _____________

View solution

Q. What will happen if shunt field suddenly opens, in a differential compound DC motor?

View solution

Q. What will happen if the series field of a differential compound motor is short circuited?

View solution

Q. What will happen if the series field of a cumulative compound motor is short circuited?

View solution

Q. DC motor is to a drive a load which is almost zero for certain part of the load cycle and peak value for short duration. We will select __________

View solution

Q. With increase in armature current, speed of the cumulative compound motor _________

View solution

Q. Speed current characteristic of cumulative DC compound motor at larger values of armature current is similar to that of _____________

View solution

Q. Differential compound motor is used in large number of applications.

View solution

Q. Where speed-current characteristic of DC shunt motor lies with respect to DC cumulative compound motor (assume current greater than full load current)?

View solution

Q. Where speed-current characteristic of DC shunt motor lies with respect to DC cumulative compound motor (assume current smaller than full load current)?

View solution

Q. Only motor listed below whose speed increases with increase in armature current is ___________

View solution