Electrical Machines Armature resistance control method is used for the _______ ? both 1 and 2 above rated speed None of these below rated speed both 1 and 2 above rated speed None of these below rated speed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V dc machine has an armature resistance of 1Ω.If the full-load current is 20 A, the differenc in the induced voltages when the machine is running as a motor and as a generator is 50 V zero 20 V 40 V 50 V zero 20 V 40 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A short-shunt cumulatively-compounded dc generator builds up a voltage of 220 V at no load at rated speed. If it is operated as a differentially compounded generator, other things remaining the same, it would build up somewhat less than 220 V 6 V more than 220 V 220 V somewhat less than 220 V 6 V more than 220 V 220 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor is running at rated speed without any additional resistance in series. If an additional resistance is placedin series, the speed of motor Remains unchanged. Increases. Decreases. Oscillates around the rated speed. Remains unchanged. Increases. Decreases. Oscillates around the rated speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 3-phase induction motor, if the supply voltage and frequency are reduced by the same ratio, then slip at which maximum torque occurs is less and maximum torque increases more and maximum torque remains constant less and maximum torque decreases more and maximum torque decreases less and maximum torque increases more and maximum torque remains constant less and maximum torque decreases more and maximum torque decreases ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A crusher is equipped with Synchronous motor. Reluctance motor. Slip ring induction motor. DC shunt motor. Synchronous motor. Reluctance motor. Slip ring induction motor. DC shunt motor. ANSWER DOWNLOAD EXAMIANS APP
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