题目内容
（请给出正确答案）
Sea water is not directly used as a coolant for engines because of its _____.
A.low specific heat
B.corrosive action
C.high expense
D.acid property
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更多“Sea water is not directly used…”相关的问题
第1题
A.cylindrical in shape with service connections located at the top and bottom
B.opened and made available for inspection during biannual inspections provided
C.with automatic drain traps for the removal of moisture
D.so installed as to make the drain connections effective under extreme conditions of trim
第2题
A.proper fuel metering
B.complete fuel/air mixing
C.minimal fuel penetration
D.proper fuel timing
第3题
A.smoky exhaust
B.starting failure
C.ignition relay
D.over speed
第4题
A.two or more impellers housed together in one casing and mounted on a single shaft
B.a single stepped impeller mounted in a progressively staged casing
C.a large radial clearance between the impeller and casing to prevent overheating due to
D.an increase in the discharge velocity of the liquid with a corresponding decrease in pressure through the stages
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