A.fire-tubes
B.furnaces
C.down-comers
D.soot-blowers
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A.The domestic water
B.Bilge water
C.Oil transfer
D.The ballast
A.A cut-off lever
B.A swivel block
C.A cross-head
D.A driving gear
A.the piston rod
B.the tiller arm
C.the connecting rod
D.the rudder
A.fouled tubes in shell and tube condenser
B.too little or too warm condenser water
C.air or non-condensable gas in system
D.overcharge of refrigerant
A.The winch motor
B.The band brake
C.The winch barrel
D.The anchor capstan
最新試題
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
The major source of chemical contaminants in hydraulic fluid is （）.
When the steering gear is in operation, you should （）.
The output volume of a positive fixed displacement pump can be changed only by （）.
The rate of heat transfer from a hot region to a cold region is affected most by the （）.
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
Thermostatic expansion valves can be adjusted for （）.
A salinity indicator is used to determine the （）.