DC Generators Carbon brushes are used in a dc machine because _______ None of the listed here Carbon is cheap Carbon lubricates and polishes the commutator Contact resistance is decreased None of the listed here Carbon is cheap Carbon lubricates and polishes the commutator Contact resistance is decreased ANSWER DOWNLOAD EXAMIANS APP
DC Generators ______ dc machine are most common. 6 pole 2 pole 8 pole 4 pole 6 pole 2 pole 8 pole 4 pole ANSWER DOWNLOAD EXAMIANS APP
DC Generators In a dc generator, the eddy current power loss is Directly proportional to thickness of each lamination None of the listed here Directly proportional to sqaure of thickness of each lamination Inversely proprtional to thickness of each lamination Directly proportional to thickness of each lamination None of the listed here Directly proportional to sqaure of thickness of each lamination Inversely proprtional to thickness of each lamination ANSWER DOWNLOAD EXAMIANS APP
DC Generators The yoke of a dc machine is made of Cast steel Silicon steel Aluminum Soft iron Cast steel Silicon steel Aluminum Soft iron ANSWER DOWNLOAD EXAMIANS APP
DC Generators The main factor which leads to unstable parallel operation of flat and over compounded generators is unequal speed regulation of their primemovers unequal number of turns in their series field windings unequal series field resistances their rising voltage characteristics unequal speed regulation of their primemovers unequal number of turns in their series field windings unequal series field resistances their rising voltage characteristics ANSWER DOWNLOAD EXAMIANS APP
DC Generators The copper loss is constant for Both shunt and compound generator None of the listed here Shunt generator only Series generator only Both shunt and compound generator None of the listed here Shunt generator only Series generator only ANSWER DOWNLOAD EXAMIANS APP
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