Electrical Machines If a DC Series motor is connected across an AC supply it will run at normal speed. not run. burn. run at lower speed. run at normal speed. not run. burn. run at lower speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is/are the necessary conditions for parallel operation of alternators? Frequency should be same Speed of alternators should be same Terminal voltage is same Both 1and 2 Frequency should be same Speed of alternators should be same Terminal voltage is same Both 1and 2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the armature electric current is increased to double its previous value, and the time of commutation is halved, how will the reactance voltage vary? It will remain the same. It will becomes four times. It will be doubled. It will be halved. It will remain the same. It will becomes four times. It will be doubled. It will be halved. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generator, lap winding is used in high voltage and low current applications. where constant speed is required. where greater load is connected. high current and low voltage applications. high voltage and low current applications. where constant speed is required. where greater load is connected. high current and low voltage applications. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following statement is correct, if short circuit ratio is high? Low short circuit current Good voltage regulation High voltage regulation None of these Low short circuit current Good voltage regulation High voltage regulation None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A series motor is efficiently suitable for high starting torque operation. none of these. constant speed operation. low starting torque operation. high starting torque operation. none of these. constant speed operation. low starting torque operation. ANSWER DOWNLOAD EXAMIANS APP
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