Electrical Machines When applied rated voltage per phase is reduce to one half, the starting torque of three phase squirrel cage induction motor becomes twice the initial value 4 time the initial value 1/4 of the intial value 1/2 of the initial value twice the initial value 4 time the initial value 1/4 of the intial value 1/2 of the initial value ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines _____________ types of induction motor are widely used. Slip ring IM. Squirrel cage IM. Single phase IM. Three phase IM. Slip ring IM. Squirrel cage IM. Single phase IM. Three phase IM. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slot wedges in a dc machine is made up of fibre. mild steel. silicon steel. cast iron. fibre. mild steel. silicon steel. cast iron. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following machines have highest power factor with respect to magnetizing current? Semi closed slot type machine. Any of the above. Open slot type machines. Closed slot type machines. Semi closed slot type machine. Any of the above. Open slot type machines. Closed slot type machines. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a given torque, reducing diverter resistance of a DC series motor causes increase in speed but armature currnet remains the same. increase in speed demanding more armature current. decrease in speed but armature current remains the same. decrease in speed demanding less armature current. increase in speed but armature currnet remains the same. increase in speed demanding more armature current. decrease in speed but armature current remains the same. decrease in speed demanding less armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The change in speed of a DC generator due to increased load is corrected by increasing armature cooling. increasing armature resistance. increasing input power of the prime mover. increasing terminal voltage. increasing armature cooling. increasing armature resistance. increasing input power of the prime mover. increasing terminal voltage. ANSWER DOWNLOAD EXAMIANS APP
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