Alternators Hydrogen is used in large alternators mainly to Strengthen the magnetic field Reduce eddy current losses Cool the machine Reduce distortion of waveform Strengthen the magnetic field Reduce eddy current losses Cool the machine Reduce distortion of waveform ANSWER DOWNLOAD EXAMIANS APP
Alternators The frequency of emf generated in an 8-pole alternator running at 900 rpm is ______ 120 Hz None of the listed here 60 Hz 50 Hz 120 Hz None of the listed here 60 Hz 50 Hz ANSWER DOWNLOAD EXAMIANS APP
Alternators The speed at which a 6-pole alternator should be driven to generate 50 cycles per second is _______ 1500 rpm 500 rpm None of the listed here 1000 rpm 1500 rpm 500 rpm None of the listed here 1000 rpm ANSWER DOWNLOAD EXAMIANS APP
Alternators If the lagging load pf of an alternator is decreased, the demagnetising effect of armature reaction _______ Is increased None of the listed here Is decreased Remains the same Is increased None of the listed here Is decreased Remains the same ANSWER DOWNLOAD EXAMIANS APP
Alternators The synchronous reactance of an alternator is generally _______ armature resistance. 5 times smaller than 5 times greater than 10 to 100 times greater than 10 times smaller than 5 times smaller than 5 times greater than 10 to 100 times greater than 10 times smaller than ANSWER DOWNLOAD EXAMIANS APP
Alternators Iron and friction losses of an alternator can be measured by a Dc motor Transformer Rectifier None of the listed here Dc motor Transformer Rectifier None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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