Merchant vessels can be divided into liners and tramps, and to the owner of cargo,（）proved to be a more convenient means of international cargo distribution .

Merchant vessels can operate in three basic ways，but ()is not one of them.

A.liners

B.tramps

C.specialized vessels

D.passenger ships

Deep-sea liners are ____()

A.Ferries

B.Passenger liners

C.Cruise ships

D.Ocean going vessels

The most common type of davit found on merchant vessels today is the ______．

A.Radial

B.Sheath-screw

C.Gravity

D.Quadrantal

Most propellers on merchant vessels are constructed of______．

A.manganese bronze

B.cast iron

C.mild steel

D.improved plow steel

Fire detecting systems on merchant vessels may be arranged to sense _____.

A.smoke

B.rate of temperature rise

C.ionized particles

D.all of the above

The harbour can ________ large liners and cargo boats.

A. let in

B. admit

C. receive

D. let out

A.they operate between 150 and 450 rpm

B.they are connected to the propeller by gearing

C.their smaller size and weight

D.they can be connected directly to the propeller without gearing

A.The medium speed 4-stroke trunk piston engine

B.The low speed 2-stroke crosshead engine

C.The medium speed 2-stroke crosshead engine

D.The low speed 4-stroke trunk piston engine

A.Slow speed diesel engines

B.Medium-speed diesel engines

C.Steam engines

D.Gasoline engines