NextMockपरीक्षा शोधा, उदा. SSC CGL, UPPSC, Lekhpal
State PCS PYQPrelims 2021

UPPCS · प्रश्न 68

'Ringelmann scale' is used to measure the density of:

  1. Smoke
  2. Polluted water
  3. Fog
  4. Noise
उत्तर दाखवा आणि स्पष्टीकरण

उत्तर: (A) Smoke

स्पष्टीकरण

The Ringelmann chart grades the density (blackness) of smoke from chimneys.