Electrical Machines The material used for commutator brushes is mostly mica. copper. carbon. cast iron. mica. copper. carbon. cast iron. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the full load speed of 3-phase, 50Hz induction motor is 950 rpm, what is its half load speed nearly equals to? 940 rpm 975 rpm 950 rpm 1000 rpm 940 rpm 975 rpm 950 rpm 1000 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single-phase transformer has its maximum efficiency at 60 percent of full load. At full load copper loss will be more than core loss. zero. less than core loss. equal to core loss. more than core loss. zero. less than core loss. equal to core loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC generator can be considered as rectifier. rotating amplifier. prime mover. power pump. rectifier. rotating amplifier. prime mover. power pump. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft of induction motor should be hollow. any of these. flexible. stiff. hollow. any of these. flexible. stiff. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements: To control the speed of a dc shunt motor above the base speed over a reasonably wide range, the motor must 1. have compensating winding 2. have interpole winding 3. be started using a 3-point starter 4. be started using a 4-point starter Of these statements 1 and 3 are correct 2 and 4 are correct 1, 2 and 4 are correct 1, 2 and 3 are correct 1 and 3 are correct 2 and 4 are correct 1, 2 and 4 are correct 1, 2 and 3 are correct ANSWER DOWNLOAD EXAMIANS APP
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