All the rings are slightly rounded on their external top and bottom edges to keep the oil film on the cylinder liner during （） for new piston rings.
举一反三
- The film of oil between the rings and the liner is not only essential for the lubrication but also （） achieving a gas seal.
- The film of oil between the rings and the liner is not only essential for the lubrication but also plays an important part in achieving （）.
- Block group contains______. A: connecting rods,crankshaft and flywheel B: pistons,connecting rods and oil pan C: cylinder block,cylinder head and oil pan D: piston rings,gasket and connecting rods
- Which statement about the Lubrication oil is fault? A: The oil absorbs and carries the heat away from the engine components. B: The oil forms a good seal between piston rings and cylinder walls. C: The oil forms a film on the metal surface and prevents a metal to metal contact. D: The oil washes off dirt away from the engine parts through its chemistry.
- Before replacing a piston you should check the rings to see that all clearances and gaps are （） the permissible tolerances.