IC Engines and Nuclear Power Plants Online Test – Multiple Choice Questions and Answers 1. The ratio of the brake power to the indicated power is called mechanical efficiency volumetric efficiency overall efficiency indicated thermal efficiency 2. In compression ignition engines, swirl denotes a haphazard motion of the gases in the chamber radial motion of the gases in the chamber rotary motion of the gases in the chamber none of the above 3. The advancing of spark timing in spark ignition engines will __________ knocking tendency increase reduce not effect none of these 4. Which of the following statement is correct regarding petrol engines? fine fuel spray mixed with air is ignited by the heat of compression which is at a high pressure The fuel is first evaporated after passing through a carburettor and is mixed with air before ignition The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug all of the above 5. The thermodynamic cycle on which the petrol engine works, is Rankine cycle Stirling cycle Joule cycle Otto cycle 6. Which of the following statement is wrong ? In compression ignition engines, because of hetrogeneous mixture, the rate of pressure rise is comparatively lower To eliminate knock in compression ignition engines, we want to achieve auto-ignition not early and desire a long delay period In compression ignition engines, detonation occurs near the beginning of combustion Since the fuel, in compression ignition engines, is injected at the end of compression stroke, therefore, there will be no pre-ignition 7. The working pressure and temperature inside the cylinder of an internal combustion engine is __________ as compared to a steam engine high very low low very high 8. The colour of exhaust from diesel engine is generally bluish black white violent 9. In order to mix air and petrol in the required proportion and to supply it to the engine during suction stroke, then __________ is employed injector fuel pump carburettor none of these 10. Morse test is used to determine the I.P. of a four stroke engine multi-cylinder engine single cylinder diesel engine single cylinder petrol engine Loading … Question 1 of 10
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