Electrical Machines If the full load speed of 3-phase, 50Hz induction motor is 950 rpm, what is its half load speed nearly equals to? 1000 rpm 975 rpm 940 rpm 950 rpm 1000 rpm 975 rpm 940 rpm 950 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The output power of any electrical motor is taken from the Motor frame. Field. Armature. Coupling mounted on the shaft. Motor frame. Field. Armature. Coupling mounted on the shaft. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A series motor is efficiently suitable for high starting torque operation. low starting torque operation. constant speed operation. none of these. high starting torque operation. low starting torque operation. constant speed operation. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature resistance of the dc motor is generally of the range 0.1 ohm. 50 ohm. 100 ohm. 0.5 ohm. 0.1 ohm. 50 ohm. 100 ohm. 0.5 ohm. 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 57.7% 33.3% 66.3% 50% 57.7% 33.3% 66.3% 50% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When applied rated voltage per phase is reduce to one half, the starting torque of three phase squirrel cage induction motor becomes 4 time the initial value 1/4 of the intial value twice the initial value 1/2 of the initial value 4 time the initial value 1/4 of the intial value twice the initial value 1/2 of the initial value ANSWER DOWNLOAD EXAMIANS APP
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