[amp_mcq option1=”reduce the bulk” option2=”provide the bulk” option3=”generator is laminated to A. reduce the bulk B. provide the bulk C. insulate the core” option4=”reduce eddy current loss” correct=”option4″]
Detailed SolutionThe armature of D.C. generator is laminated to
[amp_mcq option1=”Series generator” option2=”Shunt generator” option3=”generator generally preferred for charging automobile batteries is A. Series generator B. Shunt generator C. Long shunt compound generator” option4=”Any of the above” correct=”option3″]
Detailed SolutionD.C. generator generally preferred for charging automobile batteries is
[amp_mcq option1=”Cross-magnetizing” option2=”Demagnetizing” option3=”machine is A. Cross-magnetizing B. Demagnetizing C. Magnetizing” option4=”None of above” correct=”option1″]
Detailed SolutionArmature reaction of an unsaturated D.C. machine is
[amp_mcq option1=”Field” option2=”Brushes” option3=”generator is the resistance of A. Field B. Brushes C. Armature” option4=”Load” correct=”option1″]
Detailed SolutionThe critical resistance of the D.C. generator is the resistance of
[amp_mcq option1=”Motion of conductor” option2=”Lines of force” option3=”Either of the above” option4=”None of the above” correct=”option1″]
[amp_mcq option1=”Is the same as that of the main pole ahead” option2=”Is the same as that of the immediately preceding pole” option3=”generators the polarity of the interpoles A. Is the same as that of the main pole ahead B. Is the same as that of the immediately preceding pole C. Is opposite to that of the main pole ahead” option4=”Is neutral as these poles do not play part in generating e.m.f.” correct=”option3″]
Detailed SolutionIn D.C. generators the polarity of the interpoles
[amp_mcq option1=”Current” option2=”Voltage” option3=”machines, mechanical losses are primary function of A. Current B. Voltage C. Speed” option4=”None of above” correct=”option3″]
Detailed SolutionIn case of D.C. machines, mechanical losses are primary function of
[amp_mcq option1=”Insulation failure between two commutator bars” option2=”Insulation failure between two turns of a coil” option3=”Two of more turns of the same coil getting grounded” option4=”All of the above” correct=”option4″]
Detailed SolutionThe following constitute short-circuit in the armature winding.
[amp_mcq option1=”Will be less than 250 V” option2=”Will always be 250 V” option3=”May be greater or less than 250 V” option4=”None of the above” correct=”option3″]
[amp_mcq option1=”Increase” option2=”Decrease” option3=”generator in case the resistance of the field winding is increased, then output voltage will A. Increase B. Decrease C. Remain unaffected” option4=”Fluctuate heavily” correct=”option2″]