你可能感興趣的試題

單項(xiàng)選擇題

The lowest temperature at which the vapor formed from a liquid ignites and continues to burn steadily in the presence of an ignition source is called the（）.

A.flash point
B.fire point
C.upper explosive limit
D.lower explosive limit

單項(xiàng)選擇題

Which of the following statements describes one of the functions of the ballast system?（）

A.To permit flooding of any fuel oil storage tank on any class of ship
B.To use it as a secondary service system
C.To store reserve feed or potable water for extended cruises
D.To stabilize the ship by flooding certain designed tanks with seawater