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Q: What is the advantage of air testing?
  • A. Low expense/कम खर्च
  • B. Needs more water/अधिक पानी की जरूरत है
  • C. Repairing easy/आसान मरम्मत
  • D. Same pressure in all parts सभी भागों में एक ही दबाव
Correct Answer: Option D -
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Explanations:

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