IC Engine Online Test

1. In electronic fuel injection, there is improvement in the _____________ efficiency due to comparatively less resistance in the intake manifolds which will cause less pressure losses.

2. The primary voltage increases as the engine speed increases due to the limitations in the current switching capability of the breaker system.

3. Olefins are generally represented by ___________

4. Firing order is the order in which various cylinders of a multi cylinder engine fire.

5. A calibration during which the measurement varies with time in a specified manner and the output is recorded as a function of time is called ______________

6. In updraught type carburetors, air enters at the ___________

7. The ignition system can be turned ON or OFF, with the help of an ignition switch.

8. The conditions necessary for combustion are the presence of combustible mixture and some means of initiating the process.

9. In a diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of ___________

10. Thermal efficiency of a two stroke cycle engine is _____________ a four stroke cycle engine.

11. In a single hole nozzle, the spray cone angle varies from ___________

12. LVDT is used to measure ______________

13. Dual Cycle is a combination of ____________

14. What are the important parameters in a gasoline engine that can be controlled?

15. _____________ is the first phase in obtaining proper mixing of the fuel and air in the combustion chamber.

16. The ratio of the heat equivalent to one kW hour to the heat in fuel per B.P. hour is termed as brake thermal efficiency.

17. What is the compression ratio of motor cars?

18. In the case of water cooling, there no boundary layer of the liquid coolant on the outside of the cylinder wall.

19. What is Cetane?

20. What is the octane of natural gas?

21. The ratio of the brake power to the indicated power is called ______________

22. Piston rings are usually made of __________

23. A petrol engine has compression ratio from __________

24. Dissociation is the disintegration of burnt gases at __________ temperatures.

25. The flow rate of EGR is not controlled by the Engine management system.

26. The difference between I.P. and B.P. is known as total engine friction loss.

27. Use of low octane fuel can eliminate detonation.

28. Purging is the process by which the gasoline vapours are removed from the charcoal particles inside the ___________

29. What are the types of Multi-Point Fuel Injection System?

30. The thermal efficiency of petrol and gas engines is about ___________

31. Vacuum advance mechanism shifts the ignition point under ____________ load operation.

32. ____________ is collected during engine startup time when the catalytic converter is cold, and then later released back into the exhaust flow when the converter is hot.

33. Which of the following are the types of synthetic lubricants?

34. Detonation cannot be prevented by reducing peak cylinder pressure.

35. With greatly increased mixing efficiency and speeds, large regions of fuel-rich mixtures can be avoided when combustion starts.

36. To prevent blockage of the nozzle by dust particles, the gasoline is filtered by installing a ______________ at the inlet to the float chamber.

37. The knocking tendency in spark ignition engines can be decreased by adding dopes like tetra ethyl lead and ethylene dibromide.

38. The ___________ type injection pump consist of a reciprocating plunger inside a barrel.

39. ____________ is the speed of journal, more will be the oil pulled into the apex of the wedge of oil in the clearances space.

40. What is the principle of compensating jet device is to make the mixture?

41. A cold plug has a large heat transfer path and a large area exposed to the combustion gases or compared to hot plug.

42. Fuel is injected in a four-stroke CI engine ___________

43. In the passenger cars, which of the following type of carburetor is preferred?

44. In Morse test, the engine is first run at the required speed by adjusting the throttle in ___________

45. In __________ scavenging system the inlet and exhaust ports are located on opposite sides of the cylinder.

46. What is the combustion in spark ignition engine?

47. If the engine is operating with richer mixtures the optimum spark timing must be _____________

48. When the spark advance is same as the optimum value the heat rejected to cooling system is increased.

49. Crankcase scavenging arrangement is very economical and inefficient in operation.

50. Dual cycle is also known as ____________