题目内容

A segregated ballast system is a system where

A. all ballast is processed through the oily water separator
B. ballast is taken on and discharged through a separate main deck
C. ballast and cargo tanks are separated by cofferdams
D. all ballast lines, tanks, and pumps are independent of those used for oil

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The word "off-limit" in the passage may mean

A. off-set
B. off-state
C. within limits
D. beyond the limit

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According to the passage, it is recommended that the heat exchanger side be cleaned by

A. flushing with chemical solvent without being dismantled
B. brushing mechanically after being disassembled
C. flushing with flesh water only
D. flushing with clean oil only

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为了满足工作要求，活塞销的材料一般选用______并经渗碳、淬火和低温回火处理。I、低碳钢(15钢)，II、中碳钢(35钢)，III、合金调质钢，IV、滚动轴承钢(GCr15)，V、合金渗碳钢(20Cr)

A. I+II+V
B. I+V
C. II+V
D. I+III+V

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The desirable properties or a marine fuel oil should include_______.

A. high flash point and high viscosity
B. low flash point and high viscosity
C. low heating value and high sulphur content
D. high heating value and low sulphur content

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A segregated ballast system is a system where

A. all ballast is processed through the oily water separator B. ballast is taken on and discharged through a separate main deck C. ballast and cargo tanks are separated by cofferdams D. all ballast lines, tanks, and pumps are independent of those used for oil

The word "off-limit" in the passage may mean

According to the passage, it is recommended that the heat exchanger side be cleaned by

为了满足工作要求，活塞销的材料一般选用______并经渗碳、淬火和低温回火处理。I、低碳钢(15钢)，II、中碳钢(35钢)，III、合金调质钢，IV、滚动轴承钢(GCr15)，V、合金渗碳钢(20Cr)

The desirable properties or a marine fuel oil should include_______.

A. all ballast is processed through the oily water separator
B. ballast is taken on and discharged through a separate main deck
C. ballast and cargo tanks are separated by cofferdams
D. all ballast lines, tanks, and pumps are independent of those used for oil