is usually cooled by sea water
can be replaced when worn out
is in direct contact with the water in the bore of the cylinder
can t expand when heated
第1题：
the same, whether at sea, or during maneuvering
adjusted during each hour of operation while at constant RPM
higher at sea than while maneuvering
lower at sea than while maneuvering
第2题：
a single, long-stroke, slow-speed, turbocharged, two-stroke diesel engine
a single, long-stroke, medium-speed, turbocharged, four-stroke diesel engine
two medium-speed, turbocharged, four-stroke diesel engines
a variable-speed AC generator
第3题：
Each cylinder liner on the marine medium speed engines _____.
A.is usually cooled by sea water
B.can be replaced when worn out
C.is in direct contact with the water in the bore of the cylinder
D.can t expand when heated
第4题：
low compression pressure
increased piston wear
increased cylinder lube oil consumption
poor contact between compression rings and liner
第5题：
welded
replaced
drilled again
bored
第6题：
the column
the jacket
cylinder cover
cylinder liner
第7题：
starting the engine while hot
knurling the piston skirt
operating the engine overheated
scuff resistant piston rings
第8题：
Diesel engine blow-by is the leakage of combustion gases past the( ).
A.oil rings only
B.compression and scraper rings
C.cylinder liner sealing
D.cylinder liner ring grooves
第9题：
inefficiency
oiliness
detergency
purity
第10题：
chromium plating piston rings
knurling the piston skirt
extended maximum power operation
applying load to a cold diesel engine