1 . For manometer, a better liquid combination is one having-------

  • A. No surface tension
  • B. High density and viscosity
  • C. Lower surface tension
  • D. Higher surface tension
  • D. None
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পায়রা বন্দর কর্তৃপক্ষ (বিভিন্ন পদ) 06-11-2020
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