DC Motors in Electrical and Electronics : Practice MCQ Questions & Answers with Explanations

For which types of D.C. motor, dynamic braking is generally used ?

For which of the following applications a D.C. motor is preferred over an A.C. motor ?

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

For starting a D.C. motor a starter is required because

For constant torque drive which speed control method is preferred ?

For a D.C. shunt motor if the excitation is changed

Following motor is used where high starting torque and wide speed range control is required.

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

During rheostat braking of D.C. series motors

Differentially compound D.C. motors can find applications requiring

D.C. shunt motors are used for driving

D.C. series motors are used

D.C. motor is to drive a load which has certain minimum value for most of the time and some peak value for short duration. We will select the

D.C. motor is to a drive a load which is almost nil for certain part of the load cycle and peak value for short duration. We will select this

D.C. generators are normally designed for maximum efficiency around

D.C. generators are installed near the load centres to reduce

By looking at which part of the motor, it can be easily confirmed that a particular motor is D.C. motor?

Buses, trains, trolleys, hoists, cranes require high starting torque and therefore make use of

At the instant of starting when a D.C. motor is put on supply, it behaves like

As there is no back e.m.f. at the instant of starting a D.C. motor, in order to prevent a heavy current from flowing though the armature circuit