The essential condition for parallel operation of two D.C. generators is that they have ________________?

Related Mcqs:

The bearings used to support the rotor shafts are generally______________?

A. ball bearings B. bush bearings C. magnetic bearmgs D. needle bearings...

Eddy currents are induced in the pole shoes of a D.C. machine due to______________?

A. oscillating magnetic field B. pulsating magnetic flux C. relative rotation between field and armature D. all above...

Magnetic field in a D.C. generator is produced by_______________?

A. electromagnets B. permanent magnets C. both A. and B. D. none of the above...

A shunt generator running at 1000 r.p.m. has generated e.m.f. as 200 V. If the speed increases to 1200 r.p.m., the generated e.m.f. will be nearly_______________?

A. 150 V B. 175 V C. 240 V D. 290 V...

If a self excited D.C. generator after being installed, fails to build up on its first trial run, the first thing to do is to______________?

A. reverse the field connections B. increase the field resistance C. increase the speed of primemover D. check armature insulation resistance...