单项选择题
Because of the resulting higher pressures in the cylinder from the combustion of this greater mass of fuel, and the larger diameters, the liner must be made （） at the top to accommodate the higher stresses, and prevent cracking of the material.
A.thinner
B.thicker
C.smoother
D.rougher
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相关考题
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单项选择题
Oil is supplied to the crosshead using a swinging arm or a （） and is sometimes boosted in pressure to and efficient lubrication.
A.telescopic pipe
B.large bore pipe
C.generating pipe
D.central pipe -
单项选择题
Because of the high loads the bearing material is a tin- aluminum alloy bonded to a steel shellThe crosshead pin is highly polished to a （）.
A.flat surface
B.mirror finish
C.sloping surface
D.inclined surface -
单项选择题
The load on the crosshead pin is always （）, so it is the （）half of the bearing which is subject to wear.
A.upwards；top
B.upwards；bottom
C.downwards；top
D.downwards；bottom
