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 2.56 %. 3.76%. 4.76%. 2.57 %. 2.56 %. 3.76%. 4.76%. 2.57 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following transformer insulating oil generally used in India? Naphtha based insulating oil. Olefin based insulating oil. Aromatics based insulating oil. Paraffin based insulating oil. Naphtha based insulating oil. Olefin based insulating oil. Aromatics based insulating oil. Paraffin based insulating oil. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements regarding the magnetization characteristics of a dc generator : 1. It represents the variation of field flux with field current. 2. Variation of open-circuit terminal voltage with field current is independent of speed 3. It is non-linear from zero to rated field current 4. It helps to determine the critical field resistance at a given speed 5. It always starts from the origin Which of these statements are correct ? 3 and 5 1, 2 and 5 1 and 4 2, 3 and 4 3 and 5 1, 2 and 5 1 and 4 2, 3 and 4 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC machine is a conduction machine. none of above are correct. both are correct. convection machine. conduction machine. none of above are correct. both are correct. convection machine. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A frog leg winding is used in a DC machine to eliminate the use drum winding. reactance voltage produced due to communication. the use of compensating winding. the use equalizer in lap winding. the use drum winding. reactance voltage produced due to communication. the use of compensating winding. the use equalizer in lap winding. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 4 pole IM is supplied from a 50 Hz source. Calculate rotor frequency when rotor runs 600 rpm? 20 Hz. Can be determined. 30 Hz. 35 Hz. 20 Hz. Can be determined. 30 Hz. 35 Hz. ANSWER DOWNLOAD EXAMIANS APP
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