Question

- The following observations were made during a test on a
single cylinder four stroke oil engine :
Displacement volume = 3 litre; speed of the engine
= 600 rpm; fuel consumption = 2.9 kg/h; calorific value of
fuel = 42,500 kJ/kg; difference in tension on either side of
the brake pulley = 450 N; arm length = 0.35 m; length of
indicator diagram=60 mm; area of positive loop of indicator
diagram = 580 mm?; area of negative loop = 30 mm²; spring
constant = 0.85 bar per mm. Calculate :
:
(a) bp
(b) ip
(c) Mechanical efficiency
(d) brake thermal efficiency
20
(e) bsfc.​

Answer 1

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