In a D.C. machine the current per brush arm should not be more than_____________?

Related Mcqs:

Electrical machines having a power output up to about 750 W may be called__________machines?

A. small size B. medium size C. large size D. any of the above...

cooling is the process of dissipating the armature and field winding losses to a cooling medium circulating within the winding insulation wall______________?

A. Direct B. Indirect C. Conventional D. Any of the above...

With direct water cooling it is possible to have ratings of about_____________?

A. 200 MW B. 300 MW C. 400 MW D. 600 MW...

In transformers using hot rolled steel, the cross-section of the yoke is made about __________ greater than that of the core?

A. 5 percent B. 10 percent C. 15 percent D. 30 percent E. none of the above...

Transformers with a capacity of up to __________ have a cooling radiator system with natural cooling?

A. 2 MVA B. 5 MVA C. 7.5 MVA D. 10 MVA...