GATE ME 2017 Set 1 — Question 9

MCQ+2 / -0.67EasyCentrifugal & Reciprocating PumpsHydraulic Turbines & PumpsTurbomachinery

Turbomachinery → Hydraulic Turbines & Pumps → Centrifugal & Reciprocating Pumps

Last updated 5 September 2026

Question

Which one of the following is NOT a rotating machine?

Correct answer (C) Jet pump Solution Rotating machines are devices that have moving parts that rotate to transfer energy to or from a fluid. 1. Centrifugal pump : Uses a rotating impeller to increase the pressure and flow of a fluid. 2. Gear pump : A positive displacement pump that uses rotating gears to move fluid. 3. Vane pump : Uses rotating vanes in a cavity to move fluid. 4. Jet pump : Also known as an ejector, it has no moving parts. It works on the principle of momentum transfer from a high-velocity primary fluid jet to a secondary fluid. Since it has no rotating components, it is NOT a rotating machine. Therefore, the correct option is (C). Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (C) Jet pump Solution Rotating machines are devices that have moving parts that rotate to transfer energy to or from a fluid. 1. Centrifugal pump : Uses a rotating impeller to increase the pressure and flow of a fluid. 2. Gear pump : A positive displacement pump that uses rotating gears to move fluid. 3. Vane pump : Uses rotating vanes in a cavity to move fluid. 4. Jet pump : Also known as an ejector, it has no moving parts. It works on the principle of momentum transfer from a high-velocity primary fluid jet to a secondary fluid. Since it has no rotating components, it is NOT a rotating machine. Therefore, the correct option is (C).

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