The bearings used to support the rotor shafts are generally______________?

Related Mcqs:

In a four-pole D.C. machine____________?

A. all the four poles are north poles B. alternate poles are north and south C. all the four poles are south poles D. two north poles follow two south poles...

D.C. generators are connected to the busbars or disconnected from them only under the floating condition________________?

A. to avoid sudden loading of the primemover B. to avoid mechanicaljerk to the shaft C. to avoid burning of switch contacts D. all above...

In a D.C. machine stray loss is the sum of_____________?

A. total copper loss and mechanical loss B. armature copper loss and iron loss C. shunt field copper loss and mechanical loss D. iron loss and mechanical loss...

In a D.C. generator the magnetic neutral axis coincides with the geometrical neutral axis, when_______________?

A. there is no load on|he generator B. the generator runs on full load C. the generator runs on overload D. the generator runs on designed speed...

In a D.C. generator the critical resistance can be increased by_____________?

A. increasing its field resistance B. decreasing its field resistance C. increasing its speed D. decreasing its speed...