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单选题
There is a support ring between the cylinder block and collar of the cylinder liner, thus carrying both the liner and the cylinder coverIt also passes to the cooling bores and to the cover（）
A
cooling water
B
cooling oil
C
refrigerant
D
lubricate oil
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单选题In a diesel engine, excessive cylinder liner wear will cause （） (1) increased blow-by (2) wear between the piston ring and grooveA
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单选题Cylinder liners from older lower powered engines had a uniform wall thickness and the cooling was achieved by circulating cooling water through a space formed between （）.A
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单选题In the sentence “In some designs the cylinder oil is timed so that the oil injects only on the piston ring belt, the "piston ring belt" means （）.A
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piston skirtD
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单选题Which of the following statements concerning cylinder liner wear is true?（）A
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单选题If the piston ring gap remains insufficient when installing new rings, youshould（）A
install oversized ringsB
hone the cylinder liner to allow ring installationC
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单选题There is a support ring between the cylinder block and collar of the cylinder liner, thus carrying both the liner and the cylinder coverIt also passes to the cooling bores and to the cover（）A
cooling waterB
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单选题A-frames are mounted on the bed plate and support （） and cylinder block.A
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单选题In a diesel engine, excessive cylinder liner wear will cause （） Ⅰ.increased blow-by Ⅱ.wear between the piston ring and grooveA
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单选题If the back clearance of a piston ring is excessive,（）A
compression pressure in the cylinder will be higherB
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combustion gases will penetrate beneath the ring landD
piston side thrust will be increased
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单选题A metal ring on the bottom of a block，to which the standing part of a tackle is spliced，is known as a(n)（）.A
becketB
loopC
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单选题A properly honed diesel engine cylinder liner will（）A
prevent piston ring wearB
shorten the ring break-in periodC
prevent cylinder liner glazingD
appear slick and glazed
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