Question

In shunt and compound motor starting the shunt field should be made on with full starting resistance in ____________

(a) Series with field

(b) Parallel with field

(c) Series with armature

(d) Parallel with armature

I had been asked this question in a job interview.

I'd like to ask this question from Starting of DC Motors topic in section DC Motors of DC Machines

Answer 1

Correct answer is (c) Series with armature

For explanation I would say: In shunt and compound motors starting the shunt field should be switched on with full starting resistance in armature circuit. A short time delay in this position allows the field current to build up to the steady value of the inductive field transients.