A fuel-air mixture below the lower explosive limit is too（）.

单项选择题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（）.

A.bigger propeller
B.smaller power weight ratio
C.smaller propeller
D.larger power weight ratio

单项选择题A towing vessel’s capability is BEST measured by horsepower，bollard pull，maneuverability and（）.

A.displacement
B.stability
C.towrope pull
D.propeller design

单项选择题A thrust block is designed to（）.

A.absorb the shock of wave pressure at the bow
B.be placed between the engines and the foundation to absorb the vibration
C.transmit the thrust of the engine to the propeller
D.transmit the thrust of the propeller to the vessel

单项选择题A simplified construction plan may be included in the ship construction portfolio provided it adequately defines the（）.

A.areas where special materials are used
B.hazardous areas
C.location of emergency repair equipment
D.type and strength of materials used

单项选择题A Kort nozzle is a(n)（）.

A.hollow tube surrounding the propeller used to improve thrust
B.nozzle attached to a firefighting hose
C.intake valve on a diesel engine
D.piston cylinder on a diesel engine