Electrical Machines Dissolve gas analysis of transformer oil is carried out to determine condition of bushings. condition of transformer oil. condition of bushing stud. condition of transformer. condition of bushings. condition of transformer oil. condition of bushing stud. condition of transformer. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor is used in grinders? Synchronous motor. Capacitor start IM. Split phase IM. Capacitor start capacitor run IM. Synchronous motor. Capacitor start IM. Split phase IM. Capacitor start capacitor run IM. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V, DC shunt motor is operating at a speed of 1440 rpm. The armature resistance is 1.0 Ω and armature current is 10 A. of the excitation of the machine is reduced by 10%, the extra resistance to be put in the armature circuit to maintain the same speed and torque will be 3.1 Ω 1.79 Ω 2 .1 Ω 1.8 9 Ω 3.1 Ω 1.79 Ω 2 .1 Ω 1.8 9 Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A three phase induction motor has a synchronous speed of 1500 rpm the machine runs at 1460 rpm at a particular load. The slip at this load is ___________. 5 %. 2.67 %. 30 %. 1.5 %. 5 %. 2.67 %. 30 %. 1.5 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motor the 7th harmonic torque may make the motor rotate at (1 / 7)th synchronous speed. This is called crawling. resonance. cogging. harmonics. crawling. resonance. cogging. harmonics. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The wound rotor type IM is used for____________ speed operation. variable. minimum. constant. maximum. variable. minimum. constant. maximum. ANSWER DOWNLOAD EXAMIANS APP
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