railway RRB Technician Grade 3 Mock Test 2024 General Science

एयर ब्लास्ट सर्किट ब्रेकर __________ दबाव में संचालित होता है।

1
30 - 50 kg/cm2
2
20 - 30 kg/cm2
3
1 - 5 kg/cm2
4
10 - 20 kg/cm2
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