Question: The following data refers to a test on a single cylinder oil engine working on four-stroke cycle: Diameter of brake wheel = 60 cm;

The following data refers to a test on a single cylinder oil

The following data refers to a test on a single cylinder oil engine working on four-stroke cycle: Diameter of brake wheel = 60 cm; rope diameter = 3 cm; dead load is 25 kg, spring balance reading = 5 kg, and the engine is running at 400 rev/min. The indicator diagram has area = 4 cm, length=6 cm, and spring stiffness is 12 bar/cm. The fuel consumption is 0.23 kg/kWh and the fuel used has a calorific value 43963.5 kJ/kg. Taking cylinder bore 10 cm and piston stroke 15 cm, calculate the brake power, indicated power, mechanical and indicated thermal efficiencies of the engine.

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