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Internal Combustion Engine: Engine Lubrication /Engine Cooling / Turbocharging-supercharging
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Internal Combustion Engine: Engine Lubrication /Engine Cooling / Turbocharging-supercharging
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25 Questions

1. Greases perform better than oils under conditions requiring
2. Which of the following part is not lubricated by a pressure feed system?
3. The following type(s) of Oil pump(s) is (are) used in Engine Lubrication system
4. Turbocharged engines produce lower cylinder volumetric efficiencies compared with the normally aspirated induction systems.
5. The heat flow to water jackets, on an average, is about ____________ for large engines.
6. A typical petrol engine may harness up to ____________ of the energy contained in the fuel supplied.
7. Rich mixtures are used to control detonation, which further increases the specific fuel consumption of the engine.
8. ____________ of fuel energy is wasted as heat energy to outgoing exhaust gases.
9. Full pressure sump lubrication system is generally adopted for high capacity engines.
10. Lubricating grease is a solid to semi-solid dispersion of a thickening agent in liquid lubricant.
11. The increased flame speeds make the petrol engine more sensitive to fuel-air ratio and engine cannot run on strong mixtures without knock.
12. When the engine is suddenly accelerated there will be a small time delay before the extra energy discharged into the turbine housing volute can speed up the turbine wheel.
13. The compression of the charge entering the cells of the impeller depends upon the centrifugal force effect which decreases with the square of the rotational speed of the impeller wheel.
14. The heat flow to water jackets, on average, is about ____________ for small engines.
15. ____________ of fuel energy is wasted as heat energy to friction, pumping and dynamic movement.
16. Wet sump lubrication system employs a large capacity oil sump at the base of the crank chamber, from which the oil is drawn by a ____ and delivered to various parts.
17. Supercharging of S.I engines is employed only for aircraft and racing car engines.
18. Which of the following parts are lubricated by splash system?
19. What is the outlet cooling water temperature for small engines?
20. In the following system, lubricating oil is carried in separate tanks from where it is fed to the engine
21. The following type of Lubrication system is used in Aircraft Engines
22. Splash system is suitable for high and medium speed engines having moderate bearing load pressures.
23. Turbochargers are centrifugal compressors driven by the exhaust gas turbines.
24. The turbocharged diesel engine requires ____________ cooling air than naturally aspired diesel engines.
25. The following type of Lubrication system is used in two stroke engines

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