A four-stroke, four cylinder racing engine of capacity 2.495 litres has a bore of 94 mm and a compression ratio of 12/1. When tested against a dynamometer with a torque arm of 0.461 m a maximum load of 622 N was obtained at 5000 rev/min, and at a peak speed of 6750 rev/min the load was 547 N. The minimum fuel consumption was 17.2 ml/s at a speed of 5000 rev/min, the specific gravity of the fuel being 0.735, and calorific value of 44200 kJ/kg. Calculate: 3.1 The maximum brake mean effective pressure The maximum brake power 3.2 3.3 The minimum specific fuel consumption 3.4 The maximum thermal efficiency at maximum torque 3.5 The air standard efficiency

A four-stroke, four cylinder racing engine of capacity 2.495 litres has a bore of 94 mm and a compression ratio of 12/1. When tested against a dynamometer with a torque arm of 0.461 m a maximum load of 622 N was obtained at 5000 rev/min, and at a peak speed of 6750 rev/min the load was 547 N. The minimum fuel consumption was 17.2 ml/s at a speed of 5000 rev/min, the specific gravity of the fuel being 0.735, and calorific value of 44200 kJ/kg. Calculate: 3.1 The maximum brake mean effective pressure The maximum brake power 3.2 3.3 The minimum specific fuel consumption 3.4 The maximum thermal efficiency at maximum torque 3.5 The air standard efficiency

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

A four-stroke, four cylinder racing engine of capacity 2.495 litres has a bore of 94 mm and a compression ratio
of 12/1. When tested against a dynamometer with a torque arm of 0.461 m a maximum load of 622 N was
obtained at 5000 rev/min, and at a peak speed of 6750 rev/min the load was 547 N. The minimum fuel
consumption was 17.2 ml/s at a speed of 5000 rev/min, the specific gravity of the fuel being 0.735, and calorific
value of 44200 kJ/kg.
Calculate:
3.1
The maximum brake mean effective pressure
3.2
The maximum brake power
3.3
The minimum specific fuel consumption
3.4
The maximum thermal efficiency at maximum torque
3.5
The air standard efficiency

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