Where D.C. motor of H.P. 12 or more requires frequent starting, stopping, reversing and speed control______________?

Related Mcqs:

When two D.C. series motors are connected in parallel, the resultant speed is____________?

A. more than the normal speed B. loss than the normal speed C. normal speed D. zero...

The starting resistance of a D.C. motor is generally_______________?

A. low B. around 500 Q C. 1000 Q D. infinitely large...

The speed of a motor falls from 1100 r.p.m. at no-load to 1050 r.p.m. at rated load. The speed regulation of the motor is______________?

A. 2.36% B. 4.76% C. 6.77% D. 8.84%...

Which motor should not be started on no-load ?

A. Series motor B. Shunt motor C. Cumulatively compounded motor D. Differentially compounded motor...

The speed of a D.C. shunt motor is required to be more than full load speed. This is possible by______________?

A. reducing the field current B. decreasing the armature current C. increasing the armature current D. increasing the excitation current E. none of the above methods...