單項選擇題

In moving forward, a ship imparts forward motion to the water at the stems, this is known as （）.

A.the speed of the vessel
B.the speed of the propeller
C.the wake
D.the wake fraction

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單項選擇題

Wake varies considerably with the form of the vessel, but, generally speaking, the bluffer the ship （） the wake value.

A.the higher
B.the lower
C.the faster
D.the slower

單項選擇題

When viewed from astern, if the propeller revolves in a clockwise direction when going ahead, it is known as （）.

A.ahead direction
B.astern direction
C.right-handed
D.left-handed

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