What type of pump is shown in the illustration? GS-0144
Official USCG Answer & Rule Citation
Correct Answer: Option D — Triple screw rotary pump
The illustration depicts a triple screw rotary pump, characterized by one central power rotor and two idler rotors. This design is standard for marine fuel oil and lube oil service pumps because it provides a smooth, non-pulsating flow and is capable of handling high-viscosity fluids efficiently.
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