Following readings were taken during test of single cylinder four-stroke engine: Cylinder diameter (=250 mathrm{~mm}); stroke length
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Following readings were taken during test of single cylinder four-stroke engine:
Cylinder diameter \(=250 \mathrm{~mm}\); stroke length \(=\) \(400 \mathrm{~mm}\); m.e.p. \(=6.5\) bar; Engine speed \(=250\) rpm; net load on brake \(=1,080 \mathrm{~N}\); effective diameter of brake \(=1.5 \mathrm{~m}\); fuel used per hour \(=\) \(10 \mathrm{~kg}\); calorific value of fuel \(=44,300 \mathrm{~kJ} / \mathrm{kg}\).
Calculate: (i) indicated horse power, (ii) brake horse power, (iii) mechanical efficiency, and (iv) indicated thermal efficiency.
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