Electrical Machines The speed of a motor falls from 1100 r.p.m at no-load to 1050 r.p.m at rated load. The speed regulation of motor is 4.76%. 3.76%. 2.57 %. 2.56 %. 4.76%. 3.76%. 2.57 %. 2.56 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Swinburne's test is applicable to DC series motor. DC shunt and level Compound motor. DC compound motor. DC Shunt motor. DC series motor. DC shunt and level Compound motor. DC compound motor. DC Shunt motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the source voltage of a DC motor is increased, which of the following will decrease? Starting torque. Full load current. Starting torque, operating speed, full load current. Operating speed. Starting torque. Full load current. Starting torque, operating speed, full load current. Operating speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature resistance of a permanent magnet dc motor is 0.8 Ohm. At no load, the motor draws 1.5 A from a supply voltage of 25 V and runs at 1500 rpm. The efficiency of the motor while it is operating on load at 1500 rpm drawing a current of 3.5 A from the same source will be 59.2%. 57.1%. 88.8%. 48.0%. 59.2%. 57.1%. 88.8%. 48.0%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If starter is not used with large DC motor for starting, it will provide execessive voltage drop in line. damage the armature and commutator. all of above. draw a starting current many times its rated full load current. provide execessive voltage drop in line. damage the armature and commutator. all of above. draw a starting current many times its rated full load current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The short circuit test on a transformer is conducted to obtain hysteresis loss. core loses only. copper losses. eddy current loss. hysteresis loss. core loses only. copper losses. eddy current loss. ANSWER DOWNLOAD EXAMIANS APP
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