Electrical Machines Slip rings of an induction motors are made of carbon. phosphor bronze. aluminium. stainless steel. carbon. phosphor bronze. aluminium. stainless steel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A compound dc generator is delivering full load current at a terminal voltage of 230 V. Its series-field winding gets short circuited. If its terminal voltage 1. becomes more than 230 V, it is overcompounded generator 2. becomes more than 230 V, it is differentially compounded generator 3. becomes less than 230 V, it is overcompounded generator 4. becomes less than 230 V, it is differentially compounded generator 5. becomes less than 230 V, it is level compounded generator From these, the correct answer is 2, 3, 5 1, 4, 5 2,3 1, 4 2, 3, 5 1, 4, 5 2,3 1, 4 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For satisfactory performance of 3-phase 480V, 60 Hz induction motor, the supply voltage at 50 Hz should be equal to 420 V. 350 V. 480 V. 400 V. 420 V. 350 V. 480 V. 400 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For power factor improvement the synchronous motor is to be lightly loaded and underecited heavily loaded and over excited lightly loaded and over excited heavily loaded and underexcited lightly loaded and underecited heavily loaded and over excited lightly loaded and over excited heavily loaded and underexcited ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A generator may loose residual magnetism due to any of these. vibrations. over excitation. heating. any of these. vibrations. over excitation. heating. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A commutator with a diameter of 50 cm rotating at 1000 rpm. For a brush width of 1.5 cm, find the time of commutation in ms. 0.443. 0.512. 0.573. 0.649. 0.443. 0.512. 0.573. 0.649. ANSWER DOWNLOAD EXAMIANS APP
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