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Which supercharger doesn’t deliver pressure at low speeds?(a) Dynamic compressor(b) Negative displacement(c) Static compressor(d) Positive displacementThe question was posed to me in unit test.This interesting question is from Petrol Engine Fuel Supply System in section Exhaust System & Petrol Engine Fuel Supply System of Automotive Engine Design

Answer»

The correct CHOICE is (a) Dynamic COMPRESSOR

Explanation: Positive DISPLACEMENT supercharger deliver an ALMOST constant level pressure increase at all ENGINE RPM; above the threshold, speed pressure increases exponentially in a compressor.



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