Electrical Machines The 3 - Φ induction motor with rotor circuit open will run normally. get over heated. make noise. not run. run normally. get over heated. make noise. not run. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine, which of these parameters remain the same whether it runs as a DC motor or a DC generator? Induced emf. Can not be determined. Mechanical power. Armature current. Induced emf. Can not be determined. Mechanical power. Armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4-pole dc generator runs at 1500 rpm. The frequencyof current in the armature winding is 50 Hz 0 Hz 25 Hz 100 Hz 50 Hz 0 Hz 25 Hz 100 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Series generators are used in which of the following applications? Arc welding. Air crafts. All of these Used as boosters in dc distribution or transmission. Arc welding. Air crafts. All of these Used as boosters in dc distribution or transmission. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Short circuit test is performed on a transformer with a certain impressed voltage at rated frequency. If the short circuit test is now performed with the same magnitude of impressed voltage, but at frequency higher than the rated frequency then The magnetude of current will increase, but power factor will decrease. The magnitude of current will decrease but the power factor will increase. The magnitude of circuit as well as the power factor will decrease. The magnitude will both increase. The magnetude of current will increase, but power factor will decrease. The magnitude of current will decrease but the power factor will increase. The magnitude of circuit as well as the power factor will decrease. The magnitude will both increase. ANSWER DOWNLOAD EXAMIANS APP
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 2.57 %. 3.76%. 2.56 %. 4.76%. 2.57 %. 3.76%. 2.56 %. 4.76%. ANSWER DOWNLOAD EXAMIANS APP
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