Q. What is the function of the compression ring?

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Q. What is the function of the oil ring?

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Q. Piston rings are usually made of which material?

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Q. Usually how many piston rings are present in a petrol engine?

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Q. The compression rings have which cross-section?

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Q. In the formula b= D\(\sqrt{\frac{3P_w}{\sigma_t}}\), what is the unit of Pw?

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Q. Find the range of axial thickness of the piston ring, when b= 7.5 mm?

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Q. Find the limit on the minimum axial thickness when D=150 mm and Z=7?

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Q. Find the Radial width of the piston ring, when D= 250 mm, σt= 100MPa, and pw= 0.03 N/mm²?

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Q. Where can we see the piston barrel in the piston?

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Q. Which of the mentioned below is the formula for calculating the thickness of the piston barrel at the top end?

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Q. In the formula t₃=(0.03D+b+4.9) what is the unit of b?

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Q. Calculate the thickness of the piston barrel at the top end, when D= 80 mm and b= 7.5 mm?

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Q. Calculate the thickness of the piston barrel at the lower end when t₃=13 mm?

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Q. Which type of piston rings are preferred in an engine?

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Q. What is the gap between the free ends of the ring before assembly when b= 6 mm?

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Q. What is the gap between the free ends of the ring after assembly when D=80 mm?

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Q. Calculate the distance from the top of the piston to the first ring grove when th=7 mm?

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Q. Calculate the width of the ring groove when h=5 mm?

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Q. Which portion of the piston is known as a skirt?

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