單項(xiàng)選擇題Deck cranes require（） time to prepare for working cargo than derricks.

A.less
B.more
C.many
D.much


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 duty of a deck winch is to lift and lower a load by means of a fixed rope on （）.

A.a warp end
B.a mooring winch
C.a worm gear
D.a barrel

2.單項(xiàng)選擇題Most anchor handling equipment incorporates （） for mooring purposes.

A.cable lifters
B.spur wheels
C.bollard
D.warpends

3.單項(xiàng)選擇題A variable displacement system of hydraulic drives consists of （）.

A.a variable displacement axial piston pump
B.a constant displacement axial piston pump
C.a reciprocating piston pump
D.a centrifugal pump

4.單項(xiàng)選擇題Which of the following hydraulic systems is not one of the three sub-division of the Hydraulic drive system?（）

A.Constant pressure system
B.Variable pressure system
C.Variable displacement system
D.Constant volume system

5.單項(xiàng)選擇題It is important with all hydraulic systems to ensure that interlocking arrangements provided for pump or motor control levers are （） before the pump driving motor can be started.

A.in the pert position
B.in the starboard position
C.in the neutral position
D.to be dismantled