Cargo pump relief valves are piped to the（）.

As the propeller turns，voids are formed on the trailing and leading edges of the propeller blades causing a loss of propulsive efficiency，pitting of the blades，and vibration. These voids are known as（）.

The rudders are amidships and both screws are going ahead. What will happen if the starboard screw is stopped?（）

In ship construction，keel scantlings should be the greatest（）.

The boat is stowed on the davit rather than on a cradle with which type of davit?（）

Permission is kindly requested（）the ballast water.

The extension of the after part of the keel in a single-screw vessel upon which the stern post rests is called the（）.

If a gasoline engine turns over freely but will not start，the cause is generally（）.

An example of a modern anchor which has a stock is a(n)（）.

If the engine of a survival craft does not start，check to see（）.