单选题 If ______ taken at regular intervals, any unequal distribution of load will be easily found out.

单选题 The main operating characteristic of diesel engines which distinguishes them from other internal combustion engines is the ______.

单选题 The low speed diesel engines are tall to allow for long strokes which improve engine ______.

单选题 Medium speed engines are used widely as ______ engines in most merchant cargo ships.

单选题 Ship propulsion normally occurs with the help of a ______, which is the term most widely used in English, although the word "screw" is sometimes seen, inter alia in combinations such as a "twin-screw" propulsion plant.

单选题 Large, slow speed, two-stroke marine diesel engines are directly coupled to propeller and do not require a ______.

单选题 The influence of frictional and residual resistances depends on how much of the hull is ______ the waterline, while the influence of air resistance depends on how much of the ship is ______ the waterline.

单选题 The ______ engine is used for alternators and sometimes for main propulsion with a gearbox to provide a propeller speed of between 90 to 120 r/min.

单选题 Most ships that do not need a particularly good manoeuvrability, such as ocean-going container ships, tankers and bulk carriers are equipped with a ______, as it offers the highest efficiency.