Electrical Machines In case of induction motors the ratio of length to pole pitch for minimum cost, is taken as 2 to 3. 3 to 5. 1.0. 1.5 to 2. 2 to 3. 3 to 5. 1.0. 1.5 to 2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 3 - Φ wound rotor induction motor the short circuit gear is used to short circuit the stator phases of the motor. None of these starting resistance in the starter. rotor at slip rings. stator phases of the motor. None of these starting resistance in the starter. rotor at slip rings. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are 4% and 5% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW? None of these generator 1 gets over load generator 2 gets over load 200 MW and 400MW None of these generator 1 gets over load generator 2 gets over load 200 MW and 400MW ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Conservator tank is used None of these for better cooling of transformer. to take up the expansion of oil due to temperature rise. to act as an oil storage. None of these for better cooling of transformer. to take up the expansion of oil due to temperature rise. to act as an oil storage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For successful parallel operation of two single phase transformers, the most essential condition is that their percentage impedances are equal KVA ratings are equal turn- ratios are exactly equal polarities are properly connected percentage impedances are equal KVA ratings are equal turn- ratios are exactly equal polarities are properly connected ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In single phase rotary converter the number of slip rings will be two. four. six. three. two. four. six. three. ANSWER DOWNLOAD EXAMIANS APP
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