The type of D.C. motor used for shears and punches is_____________?

The ratio of starting torque to full-load torque is least in case of____________?

A. series motors
B. shunt motors
C. compound motors
D. none of the above

Which of the following law/rule can he used to determine the direction of rotation of D.C. motor ?

A. Lenz’s law
B. Faraday’s law
C. Coloumb’s law
D. Fleming’s left-hand rule

If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens____________?

A. this will make armature to take heavy current, possibly burning it
B. this will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses
C. nothing will happen to motor
D. motor will come to stop

If the terminals of armature of D.C. motor are interchanged, this action will offer following kind of braking?

A. regenerative
B. plugging
C. dynamic braking
D. none of the above
E. any of the above

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

The armature voltage control of D.C. motor provides_____________?

A. constant voltage drive
B. constant current drive
C. constant torque drive
D. none of the above