The GATE Grind

GATE 2023 IN – Question 13

Sensors and Industrial Instrumentation · Flow and level measurement · 1 mark · Multiple choice

Which flow meter offers the lowest resistance to flow?

Source note: the published paper lists “Orifice flow meter” as option B. Its footnote states that the examination repeated “Turbine flow meter” in that position.

  1. Turbine flow meter
  2. Orifice flow meter
  3. Venturi meter
  4. Electromagnetic flow meter

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Show answer and explanation

Correct answer: (D) Electromagnetic flow meter

Explanation

An electromagnetic flow meter senses induced voltage across a conducting fluid through an essentially unobstructed bore. Turbine, orifice and venturi devices introduce mechanical obstruction or constriction.

Therefore **D**.