Which property of the diaphragm return spring helps in the determination of the exact pressure range?(a) Tension(b) Stress(c) Starin(d) StiffnessI had been asked this question in an international level competition.My doubt stems from Petrol Engine Fuel Supply System topic in section Petrol Engine Fuel Supply System of Automotive Engine Design

Which property of the diaphragm return spring helps in the determinati

1.	Which property of the diaphragm return spring helps in the determination of the exact pressure range?(a) Tension(b) Stress(c) Starin(d) StiffnessI had been asked this question in an international level competition.My doubt stems from Petrol Engine Fuel Supply System topic in section Petrol Engine Fuel Supply System of Automotive Engine Design
Answer» The correct CHOICE is (d) Stiffness To explain I would say: The exact PRESSURE range being determined by the stiffness of the diaphragm return SPRING. The controlled pressure in the PETROL supply line is very important to be maintained. If the pressure is low, the petrol supply will not be able to keep pace with the demand under HIGH speed or high load conditions.

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