The operation of a D.C. machine with large air gap lengths is comparatively

Related MCQs

• D.C. machines designed with a large value of air gap length have
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• The length cf air gap to be provided in ______ is primarily determined by power factor consideration.
• For large power transformers, self oil cooled type or air blast type which of the following values of current density may be used ?
• The efficiency of a machine should be as ______ as possible to reduce the operating cost.
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• The noise produced by a ______ cooled machine is less as the rotor moves in a medium of smaller density.
• The time taken by the machine to attain 0.632 of its final steady temperature rise is called
• The stator of a D.C. machine comprises of
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