單項(xiàng)選擇題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


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1.單項(xiàng)選擇題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

2.單項(xiàng)選擇題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

3.單項(xiàng)選擇題A hydraulic accumulator aboard a ship is designed to（）.

A.store fluid under pressure
B.act as a fluid reservoir
C.provide overpressure relief
D.replenish fluid to a system

4.單項(xiàng)選擇題A fuel-air mixture below the lower explosive limit is too（）.

A.rich to burn
B.lean to burn
C.cool to burn
D.dense to burn