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单选题
The bore of each cylinder is formed in a liner which can be （） when worn out.
A
welded
B
replaced
C
drilled again
D
bored
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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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refrigerantD
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单选题The cylinder is fitted with internal liner so that a water space is left （） the liner and the outer wall.A
aroundB
amongC
inD
between
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Excessive wearB
Scuffing of the linerC
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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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单选题The exhaust ports are located around the lower part of the cylinder liner, （）the products of combustion are driven by scavenging air.A
in whichB
by whichC
through whichD
from which
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