Location of compensating winding in DC Machines – DC Machines MCQ#9
Compensating winding is located on which potion of DC Machines: Commutating poles Outside yoke Pole shoes None of these Correct
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A DC Generator beyond critical field resistance will generate – DC Generator MCQ#8
A DC Generator beyond critical field resistance will generate: Maximum possible current Maximum possible voltage No Voltage Half voltage Correct
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Teeth in armature of DC Machines are skewed to reduce – DC Machines MCQ#7
Teeth in armature of DC Machines are skewed to reduce: Vibrations Eddy current losses Hysteresis losses None of these Correct
Read moreThe Armature of DC Machines is laminated to – DC Machines MCQ#6
The Armature of DC Machines is laminated to: Reduce the mass of machine Reduce inductance in machine To reduce the
Read moreThe windage loss in DC motor is proportional to – DC Machines MCQ#5
The windage loss in DC motor is proportional to: Cube root of supply voltage Square of supply voltage Square of
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Copper Loss is constant for which type of DC Generator
Copper Loss is constant for which type of DC Generator: Shunt generator Series generator Both of these None of these
Read moreUsually, the field coils of D.C. generator are made from
Usually, the field coils of D.C. generator are made from: Silica Copper Graphite Aluminum Correct answer: 2. Copper
Read moreThe approximate thickness of laminations of a D.C. machine is
The approximate thickness of laminations of a D.C. machine is: 0.05 mm 0.5 mm 1 mm 1.5 mm Correct answer:
Read moreGenerally the preferred DC Motor for cranes and hoists is
Generally the preferred DC Motor for cranes and hoists is: Cumulatively compound motor Differentially compound motor Series motor Shunt motor
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