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 1/4 of the intial value 4 time the initial value 1/2 of the initial value twice the initial value 1/4 of the intial value 4 time the initial value 1/2 of the initial value ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine, for the same value of Æ, Z and N; which one of the following statements is correct? Armature emf is more with wave winding than with lap winding. Armature emf is same as long as the flux density in the air gap remains the same. Armature emf depends on weather the machine is running as a motor or generator. Armature emf is less with wave winding than with lap winding. Armature emf is more with wave winding than with lap winding. Armature emf is same as long as the flux density in the air gap remains the same. Armature emf depends on weather the machine is running as a motor or generator. Armature emf is less with wave winding than with lap winding. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a fault at the terminal of a synchronous generator, the fault current is maximum for a line to line fault. line to ground fault. 3 - phase to ground fault. 3 - phase fault. line to line fault. line to ground fault. 3 - phase to ground fault. 3 - phase fault. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The output power indicated on the name plate of any motor is always the Power drawn in KW. Power drawn in KVA. Gross power. Output power at the shaft. Power drawn in KW. Power drawn in KVA. Gross power. Output power at the shaft. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a 3-phase, 4 pole, 50 Hz synchronous motor the frequency, pole number and the frequency are halved. The motor speed will be 3000 rpm 375 rpm 75 rpm 1500 rpm 3000 rpm 375 rpm 75 rpm 1500 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motor especially the cage rotors slots are nearly parallel to shaft axis. This is called slip. cogging. crawling. skewing. slip. cogging. crawling. skewing. ANSWER DOWNLOAD EXAMIANS APP
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