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| Q.140 | भूमिगत केबलों में, निम्नलिखित में से कौन सा इन्सुलेशन के लिए सबसे अधिक उपयोग की जाने वाली सामग्री नहीं है? | |
| Ans | 1. वार्निश किया हुआ कैम्ब्रिक (Varnished cambric) | |
| 2. संसेचित फाइबर (Impregnated fibre) | ||
| 3. संसेचित पेपर (Impregnated paper) | ||
| 4. रबर खनिज यौगिक (Rubber mineral compound) |
Correct Ans Provided: 2
