單項(xiàng)選擇題

When a vessel is in dry-dock, the vessel’s engineers should （）.

A.examine the condition of the propeller
B.chip and paint all hull protection zincs
C.install new docking plugs in all cofferdams
D.inspect the hull for hogging or sagging

你可能感興趣的試題

單項(xiàng)選擇題

Air line lubricators are used in compressed air systems to lubricate （）.

A.the suction and discharge valves
B.tools and equipment served by compressed air
C.air line reducing valves
D.all of the above

單項(xiàng)選擇題

Which of the listed devices would be installed at a control system air pressure reducing station?（）

A.Moisture separator
B.Vacuum breaker
C.Lubricator
D.Non-return valve

99色精品-9色在线-99色在线-99色视频 国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

When a vessel is in dry-dock, the vessel’s engineers should （）.

你可能感興趣的試題

Air line lubricators are used in compressed air systems to lubricate （）.

Which of the listed devices would be installed at a control system air pressure reducing station?（）

99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精