單項(xiàng)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


您可能感興趣的試卷

你可能感興趣的試題

1.單項(xiàng)選擇題The Master or person in charge of a ship shall ensure the crane record book shows the（）.

A.Date and description of each failure
B.Average load in pounds for each usage
C.Total number of lifts for each usage
D.All of the above

2.單項(xiàng)選擇題The item（）is not the advantage of the hydraulic winch．

A.less jerky starts
B.less jerky stops
C.overheating worries
D.none of the overheating worries

3.單項(xiàng)選擇題Sudden starts or stops of the boom is likely to cause all of the following except（）.

A.breaking a cargo runner
B.parting guys topping lifts
C.carrying away a block
D.overheating the resistors and eventually burning out

4.單項(xiàng)選擇題Running an electric winch at slow speed over a long period of time causes（）.

A.the speed to be retarded by the friction brake
B.a load to go downward at full speed
C.the circuit breaker to turn off
D.the resistors to overheat and eventually burn out

5.單項(xiàng)選擇題Regulations concerning the stowage，lashing，and securing of timber deck cargoes aboard general cargo vessels may be found in the（）.

A.International Cargo Bureau Regulations
B.Load Line Regulations
C.Rules and Regulations for Cargo and Miscellaneous Vessels
D.Vessel's classification society rules and regulations