engineering recuitment UPMRC Maintainer Electrical Mock Test 2024 Electrician and Wireman

एक यूनिवर्सल मोटर की घूर्णन दिशा को निम्न प्रकार से उलटा जा सकता है:

1
Switching over from ac to de
2
Reversing the supply terminals 
3
Retaining the brush leads
4
interchanging the brush leads
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