單項選擇題The net productivity per gang-hour can be improved through a decrease of().

A.cranes/derricks
B.crane/derrick cycles
C.crane/derrick cycle time
D.weight per package


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1.單項選擇題The patches where rust have been removed should be wiped clean before paint is().

A.applied
B.supplied
C.replied
D.complied

2.單項選擇題The permant dunnage attached to the frames of the ship that aids in ventilation is (are) the().

A.hatch boards
B.tank top
C.hatch beams
D.sweat bettens

3.單項選擇題The productivity of working shifts can be improved through a decrease of().

A.working hours
B.gangs
C.idle time
D.weight per set

4.單項選擇題The purpose of cant frames in steel vessel is().

A.To support the overhang of the stern
B.To strength the plating against the pounding of the sea
C.To add srength to the deck beams which support the weather deck
D.To support the plating of a cylindrical tank