A.Hydraulic oil
B.Animal oil
C.Light oil
D.Fuel oil
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A.Motors
B.Check valves
C.Safety valves
D.Reducing valve
A.cargo crane
B.jib
C.safe working load
D.oil pressure
A.dock
B.hold
C.pedestal
D.machinery space
A.the slewing motor
B.the luffing motor
C.the hoisting motor
D.none of the above
A.time
B.space
C.length
D.visibility
最新試題
A salinity indicator is used to determine the （）.
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.
One cause of high head pressure occurring in a refrigeration system can be （）.
The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?（）
The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.
An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
A salinity indicator is used to determine the （）.