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Francis

Guest on 23rd April 2022 07:53:52 AM

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  2. 17.     Describe the basic operation of spark ignition engines and compression ignition engines four-stroke cycle.
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  4. In a spark ignition engine, the fuel is mixed with air and then inducted into the cylinder during the intake process. After the piston compresses the fuel – air mixture, the spark ignites it, causing combustion , The expansion of the combustion gases pushes the piston during the power stroke
  5. The cycle of operation of the CI engine is completed in four strokes suction , compression , expansion and exhaust
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  10. 18.     Two and four stroke spark ignition and compression engine come in different configurations. Name the three [3] different configurations below.
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  12. V type                                                          Inline type                                                             Box type
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  15. 19.     The Society of Automotive Engineers (SAE) has established an oil viscosity classification system that is accepted throughout the industry. Explain how this classification system works.
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  17. Based on the coldest temperature the oil passes at, that oil is graded as SAE viscosity grade 0W, 5W, 10W, 15W, 20W, or 25W. The lower the viscosity grade, the lower the temperature the oil can pass.
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  23. 20.     Synthetic oils have many advantages over mineral oils. What are they?
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  25. The two main advantages of synthetic oils are their ability to outperform mineral oils at high operating temperatures (above 185 degrees F) and at low operating temperatures (below 0 degrees F)
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  28. 21.     What checks should be carried out on the cooling system hoses and hose connections?
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  30. Check Hoses and Connections
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  32. Cracked or worn hoses and bad connections can allow air to get into your cooling system. To check your hoses, simply squeeze them. The hoses should not collapse easily. You need to replace any hoses that are soft, rotted, or swollen
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  36. 22.     A pry bar can be used to check for separated or broken mounts, but explain the other way you can check mounts?
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  38. Heavy Vibrations. If you feel a lot of vibration in the vehicle while you are driving, there's a good chance it's the motor mount. ...
  39. Impact Noises. One of the most common signs of a failing motor mount is what we call “impact noises” that you will hear coming from the engine bay. ...
  40. Engine M

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