问题：
[单选] A Kort nozzle is a(n)（）.
hollow tube surrounding the propeller used to improve thrust。nozzle attached to a firefighting hose。intake valve on a diesel engine。piston cylinder on a diesel engine。
问题：
[单选] A simplified construction plan may be included in the ship construction portfolio provided it adequately defines the（）.
areas where special materials are used。hazardous areas。location of emergency repair equipment。type and strength of materials used。
问题：
[单选] A thrust block is designed to（）.
absorb the shock of wave pressure at the bow。be placed between the engines and the foundation to absorb the vibration。transmit the thrust of the engine to the propeller。transmit the thrust of the propeller to the vessel。
问题：
[单选] A towing vessel’s capability is BEST measured by horsepower，bollard pull，maneuverability and（）.
displacement。stability。towrope pull。propeller desig。
问题：
[单选] A VLCC (100，000 DWT+) with a 30，000 Shaft Horsepower Steam Turbine is slow to respond to engine movements and has less stopping power than normal ships because it has a（）.
bigger propeller。smaller power weight ratio。smaller propeller。larger power weight ratio。
问题：
[单选] All diesel engines are classified as（）.
four cycle。compression ignition。vacuum ignition。external combustio。
问题：
[单选] All marine low-speed diesels are of what design?（）
Four-stroke。Two-stroke。Electronic ignition。Forced exhaust。
问题：
[单选] Before starting any diesel or gasoline engine，which of the following must be checked? （）
Oil level。Flow of cooling water。Exhaust discharge。All of the above。
问题：
[单选] Diesel engines are considered safer than gasoline engines because（）.
they are more heavily built。the fuel used is less volatile。they can be easily reversed。they operate at a lower speed。
问题：
[单选] Diesel engines obtain combustion air through turbo chargers，blowers，or（）.
air starters。carburetors。natural aspiration。air receiver。
