Electrical Machines The sequence of induction motor is RYB, then the direction of induction motor can be changed by which of the following sequence? BYR RBY BRY All of these BYR RBY BRY All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following transformer insulating oil generally used in India? Naphtha based insulating oil. Paraffin based insulating oil. Aromatics based insulating oil. Olefin based insulating oil. Naphtha based insulating oil. Paraffin based insulating oil. Aromatics based insulating oil. Olefin based insulating oil. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The constant losses in transformer is/are eddy current loss. both 2 and 3. hysteresis loss. copper loss. eddy current loss. both 2 and 3. hysteresis loss. copper loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole lap wound dc generator has 4 brushes, if one of the brush is damaged, what will be the change in V, I and P ratings V/2, I/2 and P/4 V, I and P V, I/2 and P/2 V/2, I and P/2 V/2, I/2 and P/4 V, I and P V, I/2 and P/2 V/2, I and P/2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Induction motors have the advantage of less maintenance. all of below. less cost. simple in construction. less maintenance. all of below. less cost. simple in construction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The counter (or back) emf in a dc machine is 1. the same as generated emf in a dc motor 2. proportional to field flux and armature speed 3. not the same as generated emf in a dc motor 4.inversely proportional to field flux 5. proportional to number of armature conductors 6. constant from no load to full load From these, the correct answer is 2, 4, 5, 6 2, 3, 6 3, 4, 5 1, 2, 5 2, 4, 5, 6 2, 3, 6 3, 4, 5 1, 2, 5 ANSWER DOWNLOAD EXAMIANS APP
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