engineering recuitment PGCIL Diploma Trainee Mock Test 2024 Electrical Machines DC Generators

In a Hopkinson's test on two 220 V, 200 kW generators, the circulating current is equal to the full load current and, in addition, 100 A are taken from the supply. The efficiency of each machine is:

1
93%
2
90%
3
95%
4
97%
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