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The ratio of actual fuel air ratio and chemicall correct fuel air ratio.ģ3. Ratio of the indicated thermal efficiency to the corresponding ideal air standard efficiencyģ2. The ratio of the mass of the charge admitted during the suction stroke of the engine to the mass at normal pressure and temperature of the volume of the charge equal to piston displacement.ģ1. The ratio of brake power output to the fuel energy input per unit time _.ģ0. Ratio of brake power to indicated power.Ģ9. The closed area formed by suction and exhaust operation in I.C. Used to step up 6 or 12 volts to high tension voltage of about 20 Kvolts.Ģ7. A device for atomising and vaporising the fuel and mixing it with air in varying proportions.Ģ6. The principal source of exhaust carbon monoxide is_.Ģ5. Higher concentrations of NO., are found in I.C. Optimum spark advance is the timing which develops maximumĢ2. The finished part of a shaft which rotates in or against a bearing is called_.Ģ1. A _is a device used to diminish noise of the intake or exhaust.ġ8. Closes one end of the cylinder and contains the inlet and exhaust valves.ġ7. It takes care of the fluctuations or the cyclic variations in speed.ġ6. Used to produce gas-tight seal between the piston and the cylinder liners.ġ5. A restriction in the outer end of the carburettor to provide an extra rich air-fuel mixture for starting.ġ4. It times, meters and forces the fuel at high pressure through the spray nozzle.ġ3. Injection system which forces fuel through spray nozzle by hydraulic pressure.ġ2. Early or late injection of fuel in the diesel engine results in _.ġ1. A divided chamber construction, a combination of the precombustion chamber and the turbulence chamber design.ġ0. The spontaneous combustion or autoignition of an appreciable portion of the chargeĩ. The stroke-bore ratio in case of aircraft engines in normally _.Ĩ. In case of aircraft engines, the power at 6100 m altitude is about_% of the sea level wide-open throttle output for any given speed.ħ. A triangular rotor rotates on an eccentric shaft inside an epitrochoidal housing, the rotor tips being in constant contact with the housing and form three working chambers.Ħ. Low CO and hydrocarbon emission occurs at low and moderate loads in case of_.ĥ. Compression ratio maybe of the order of 11.5 : 1 to 22 : 1 in case of _.Ĥ. Compression-ignition engines use liquid fuels of _ volatility.ģ. The advantage being one gets a more efficient burning of fuel hence more power and better fuel economy with lesser emissions. In this technology fuel air mixture from the carburetor into the engine cylinder with a swirl action. What is ATFT Technology used in Honda Hunk?ĪTFT means Advance Tumble Flow Induction Technology,
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Combustible or ash and moisture free basis.ġ0.How the analyses and calorific values of fuels can be reported? What are the important operational performance parameters in design of fuel firing equipment?įuel flexibility, electrical load following capability, reliability, availability, and maintenance ease.ĩ. Which pollutant is major greenhouse gas and what is its effect?ĬO is major greenhouse gas and it traps the radiation of heat from the sun within earth’s atmosphere.Ĩ. Which are the reference fuels for knock rating of S.I. Some modern diesel engines no longer require a glow plug.Ħ. The compression ratio is high enough to combust the diesel without the aid of sparkplugs Answer Most diesel engines will have a ‘glow’ plug, this gives of enough heat to help get the engine started, the heat generated from the first few revolutions together with the compression from the piston is enough to ensure the engine keeps running. roots/screw or centrifugal), some early uses superchargers were driven directly off the crank shaft.ĥ. Supercharging usually refers to belt driven compressor (I.E. Supercharging is a method of increasing an engine’s power output, by forcing air into the engine under greater than atmospheric pressures.
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Scavenging is process of flushing out burnt gases from engine cylinder by introducing fresh air in the cylinder before exhaust stroke ends. As complete combustion is occurring, more heat liberated, not advised for long journey, engine will be over heated.What are the Advantages and Disadvantages of using LPG in Car? The gas produced in this reaction rapidly expands forcing the piston down the cylinder on the power stroke.Ģ. Chemical energy is released when the fuel-air mixture is ignited by the spark in the combustion chamber. The internal combustion engine converts chemical energy into useful mechanical energy by burning fuel.