單項選擇題Neglecting friction, you desire to life a 300 kgs weight with a stress on the hauling part of 100kgs.Which of the following tackles would you use ?（）.

A.Gun tackle
B.Luff tackle
C.Toe-fold tackle
D.Double-luff tackle


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1.單項選擇題Never（）stowed like this.

A.optional cargo should be
B.should optional cargo be
C.should be optional cargo
D.should optional cargo

2.單項選擇題0f the following, the most important consideration for a tank vessel is（）.

A.GM
B.the vertical center of gravity
C.the longitudinal center of gravity
D.the stress on the hull

3.單項選擇題0f the general methods of stowing bagged cargo, which allows maximum ventilation?（）.

A.Brick method
B.Cross tier method
C.Full-bag method
D.Half-bag method

4.單項選擇題0il product samples should be taken from the（）.

A.dock riser
B.ships cargo tanks
C.shore tank discharge
D.All of the above

5.單項選擇題0n a single-screw vessel the stern frame（）.

A.furnishes support to the rudder, propeller shaft, and transom frame
B.provides foundations for after mooring winches
C.provides foundation for the main propulaion engines
D.transfers the driving force of the propller to the hull