Electrical Machines The no load and full load speed of DC motor are 1400 rpm and 1200 rpm respectively. What is the percentage speed regulation of the motor ? 18.25%. 16.67%. 15.30%. 14.28%. 18.25%. 16.67%. 15.30%. 14.28%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the frequency of a alternator, if P = number of poles and N = revolution made per second? 120N / P Hz. PN / 2 Hz. 120P / N Hz. 120 / PN Hz. 120N / P Hz. PN / 2 Hz. 120P / N Hz. 120 / PN Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For the purpose of starting an induction motor, star/delta switch is an equivalent to auto transformer of ratio 50% 57.7% 66.3% 33.3% 50% 57.7% 66.3% 33.3% 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 75 rpm 1500 rpm 3000 rpm 375 rpm 75 rpm 1500 rpm 3000 rpm 375 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the actual arrangement of series wound generator? Armature and field both are in series with the load. Armature winding is in series with load. Armature and field both are connected. Armature and field both are parallel. Armature and field both are in series with the load. Armature winding is in series with load. Armature and field both are connected. Armature and field both are parallel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For higher values of armature, the speed of a DC series motor is Constant. Proportional to armature current. Proportional to the square of armature current. Inversely proportional to armature current. Constant. Proportional to armature current. Proportional to the square of armature current. Inversely proportional to armature current. ANSWER DOWNLOAD EXAMIANS APP
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