A.hoisting；luffing；slewing
B.lifting；raising；lowering
C.rotating；raising；handling
D.hosting；lowering；moving
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A.length
B.slack
C.height
D.rotation direction
A.boilers
B.bow thrusters
C.stabilizers
D.hatch covers
A.a motor-driven steering wheel
B.a pneumatic steering wheel
C.a hand-driven steering wheel
D.an electric steering wheel
A.the tiller arms
B.the swivel blocks
C.hunting gears
D.the rams
A.horizontal axis
B.crankshaft
C.vertical axis
D.camshaft
最新試題
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.
Which of the listed pumps is NOT a positive displacement pump?（）
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
A salinity indicator is used to determine the （）.
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.
Low compressor head pressure in a refrigeration system can be caused by（）.