DC Motors Which of the following tests will be suitable for testing two similar D.C. series motors of large capacity? Swinburne's test Field test Hopkinson's test Brake test Swinburne's test Field test Hopkinson's test Brake test ANSWER DOWNLOAD EXAMIANS APP
DC Motors The back emf in a dc motor ______ Opposes the applied voltage Aids the armature current None of the listed here Aids the applied voltage Opposes the applied voltage Aids the armature current None of the listed here Aids the applied voltage ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which one of the following is not the function of pole shoes in a D.C. machine? To support the field coils To reduce eddy current loss To reduce the reluctance of the magnetic path To spread out flux for better uniformity To support the field coils To reduce eddy current loss To reduce the reluctance of the magnetic path To spread out flux for better uniformity ANSWER DOWNLOAD EXAMIANS APP
DC Motors Where D.C. motor of H.P. 12 or more requires frequent starting, stopping, reversing and speed control Three point starter is used Drum type controller is used All above can be used Four point starter is used Three point starter is used Drum type controller is used All above can be used Four point starter is used ANSWER DOWNLOAD EXAMIANS APP
DC Motors The friction and windage losses in a dc motor depends upon Speed Field and armature resistance Flux Armature current Speed Field and armature resistance Flux Armature current ANSWER DOWNLOAD EXAMIANS APP
DC Motors Dc series motors are used in those applications where _____ is required. None of the listed here Low no load speed Constant speed High starting torque None of the listed here Low no load speed Constant speed High starting torque ANSWER DOWNLOAD EXAMIANS APP
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