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

The connected joints of pipe，usually made of three joints of pipe approximately 90 feet long，racked in the derrick when making a trip are called a（）.

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（）.

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

Anchors are prevented from running out when secured by the（）.

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

In relation to cargo gear，what does SWL mean?（）.

Static electricity may be built up by the（）.

Centrifugal pumps have what advantage(s) over reciprocating pumps?（）.