railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Electrician and Wireman Power Systems Transmission and Distribution

तीन कोअर लवचिक केबल्समध्ये न्यूट्रलचा रंग कोणता असतो?

1
तपकिरी
2
काळा
3
निळा
4
लाल
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