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Which type of energy is used to operate the diaphragm in an S U electrical pump?

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in Automotive Engine Design by (137k points)
Which type of energy is used to operate the diaphragm in an S U electrical pump?

(a) Mechanical

(b) Hydraulic

(c) Electrical

(d) Solar

This question was posed to me by my school teacher while I was bunking the class.

My question comes from Petrol Engine Fuel Supply System in portion Petrol Engine Fuel Supply System of Automotive Engine Design

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The correct option is (c) Electrical

Easy explanation: Alternate vacuum and pressure are produced due to movement of the diaphragm which is caused electrically in the S U electrical pump. Closing the ignition switch energies the solenoid winding, magnetic flux is generated which pulls the armature to which diaphragm is attached.

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