單項選擇題During which condition should the operator of a pedestal crane shutdown operations?（）

A.Bunkering barge alongside
B.Potable water spill on deck
C.Crane hydraulic hose bursts
D.Trim greater than 4 feet


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1.單項選擇題During which condition should the operator of a pedestal crane shutdown operations?（）

A.Bunkering
B.High winds
C.Potable water spill on deck

2.單項選擇題During transfer operations，a quantity of propylamine spills on deck. According to the Chemical Data Guide，the correct procedure would be to（）.

A.immediately flush the spill with large quantities of fresh water
B.cover the contaminated surface with soda-ash-soaked lime solution
C.add sodium bisulfate on the contaminated surface and spray it down with water
D.move to a position upwind of the spill and allow the product to boil off

3.單項選擇題During the winter months，the southeast trade winds are（）.

A.stronger than during the summer months
B.weaker than during the summer months
C.drier than during the summer months
D.wetter than during the summer months

4.單項選擇題During the month of October the Sun’s declination is（）.

A.north and increasing
B.north and decreasing
C.south and increasing
D.south and decreasing

5.單項選擇題During the manufacture of line，yarns are twisted together in the（）.

A.opposite direction from which the fibers are twisted together to form strands
B.same direction the fibers are twisted to form strands
C.opposite direction from which the fibers are twisted together to form the line
D.opposite direction from which the fibers are twisted together forming cables