A consideration of the power losses in electrical machines is essential for which of the following reasons?
A. Operating cost
B. Temperature rise
C. Voltage drops
D. Any of the mentioned
Answer:A
A consideration of the power losses in electrical machines is essential for which of the following reasons?
A. Operating cost B. Temperature rise C. Voltage drops D. Any of the mentioned
Explanation: A machine with lower efficiency has more losses, and therefore increased operating cost. Also, losses cause heating of the machine and therefore, its temperature rise. Similarly, voltage drop IR is associated with ohmic loss. 2. To determine the efficiency of the machine, direct load test is not advantageous because of which of the following reasons?