Compare S.I. and C.I. engine.
[3 marks]Explain the emission of S.I. and C.I. engine.
[4 marks]Compare properties of alternate fuels with Conventional I.C. engine fuel.
[7 marks]Define Stoichiometric, Rich and Lean mixture.
[3 marks]With neat sketch describe the simple carburetor.
[4 marks]Explain the working of M.P.F.I. system. State its advantages over carburetor.
[7 marks]Derive air fuel ratio through approximate analysis of simple carburetor.
[7 marks]How to control knocking tendency in S.I. engine?
[3 marks]Explain knocking in S. I. engine.
[4 marks]Explain stages of combustion in S. I. engine.
[7 marks]How to control knocking tendency in C.I. engine?
[3 marks]Explain Knocking in C. I. engine.
[4 marks]Explain stages of combustion in C.I. engine.
[7 marks]Explain supercharger.
[3 marks]Compare air cooling system with water cooling system.
[4 marks]With neat sketch explain working of full pressure lubrication system.
[7 marks]Explain turbocharger.
[3 marks]Compare wet sump lubrication with dry sump lubrication system
[4 marks]With neat sketch explain working of pressurized water cooling system.
[7 marks]Explain air box method to calculate the air consumption in I.C. Engine
[3 marks]What are the requirements of a good fuel injection system for C.I. Engine?
[4 marks]In a test of 4 cylinder 4 stroke petrol engine having 80 mm bore and 110 mm stroke. The following results were obtained at full throttle at a constant speed and with a fixed setting of the fuel supply of 0.09 kg/min. B. P. with all cylinder working = 16.5 kW B. P. with cylinder 1 cut off = 11. 35 kW B. P. with cylinder 2 cut off = 10. 95 kW B. P. with cylinder 3 cut off = 11. 45 kW B. P. with cylinder 4 cut off = 11. 65 kW1 Calculate the indicated power, mechanical efficiency, Indicated thermal efficiency and air standard efficiency of the engine. Take calorific value of fuel is 44 MJ/kg. The clearance volume of engine is 120 cc.
[7 marks]Explain Willan’s line method to find friction power of the engine.
[3 marks]Explain C.R.D.I. system.
[4 marks]The following observations were recorded in a test of 1 hour duration on a single cylinder petrol engine working on four stroke cycle. Bore: 300 mm Stroke: 450 mm Fuel used: 8.8 kg C.V. of fuel: 41800 kJ/Kg Speed: 200 rpm M.E.P. : 5.8 bar Brake friction load: 1860 N Quantity of cooling water: 650 kg Temperature rise of cooling water: 22o C Cp of water:4.18 kJ/KgK Diameter of the brake drum: 1.22 m Calculate: (i) Mechanical efficiency (ii) Brake thermal efficiency and (iii) Heat balance on Minute and Percentage basis.
