With neat sketches explain the working principle of four stroke spark ignition engine.
Four stroke spark ignition engine working principle
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List the additives of Lubricant used in S.I. engine and state their advantages.
Role of following lubricant additives (one mark each) 1. Zinc ditinophosphate: - Zinc ditinophosphate serves as an anti – oxidant and anticorrosive additive.
2. Fatty acids: - This type of additives prevents rusting of ferrous engine parts during and form acidic moisture accumulation during cold engine operation.
3. Organic Acids: - This type of additives improves the detergent action of lubricating oil.
4. Ester: - To lower the pour point of lubricating oil.
5. Silicon polymers: - This additive serves as Antifoam Agent.
Write any three pollutants in exhaust gasses....
The major air pollutants emitted by petrol & diesel engines are CO2, CO, HC, NOx, SO2, smoke & lead vapour. Effect of CO: Carbon monoxide combines with hemoglobin forming carboy hemoglobin ,which reduces oxygen carrying capacity of blood. This leads to laziness, exhaustion of body & headache. Prolong exposure can even leads to death.
A petrol engine working on otto cycle has compression ratio 8 ....
Draw theoretical and actual P-V diagrams for S.I. engines and explain briefly...
State the role of following lubricant additives
Role of following lubricant additives 1. Zinc ditinophosphate: - Zinc ditinophosphate serves as an anti – oxidant and anticorrosive additive. 2. Fatty acids: - This type of additives prevents rusting of ferrous engine parts during and form acidic moisture accumulation during cold engine operation. 3. Organic Acids: - This type of additives improves the detergent action of lubricating oil. 4. Ester: - To lower the pour point of lubricating oil. 5. Silicon polymers: - This additive serves as Antifoam Agent. 6.
Explain with neat sketch any one catalytic converter........
Fig. shows construction of simple catalytic converter exhaust fan as it enters the converter all three pollutions namely HC CO and NOX oxidizes and reduce is to the component which are acceptable to the environment, This occurs due to chemical reaction and at 600 to 7000 c temperature.
What do you mean by............
1) Friction Power:- The difference between indicated power and brake power. It is the power lost in friction FP =IP -BP
Explain the working of two stage reciprocating compressor.......
Explain how the heat balance sheet for an IC engine is prepared............
i) Heat Balance Sheet :-The complete record of heat supplied and heat rejected during a certain time(Say one minute)by an IC engine is entered in a tabulated form called as heat balance sheet. i) Heat supplied by the fuel= Mf x C where Mf= mass of fuel supplied in Kg/min C = Lower calorific value of fuel kj/kg
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