A.ballast tanks
B.sludge tanks
C.machinery space bilges
D.cargo hold bilges
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A.excessive drive motor speed
B.excessive pump discharge pressure
C.too low of a tilting box angle
D.insufficient drive motor speed
A.high pressure liquid
B.low pressure vapor
C.high pressure vapor
D.low pressure liquid
A.propeller hub
B.lignum vitae
C.shaft packing
D.labyrinth seal
A.liquid
B.dry saturated gas
C.wet saturated gas
D.superheated vapor
A.closed, and no leakage permitted across the shaft packing
B.closed, and only slight leakage permitted across the shaft packing
C.open, and no leakage permitted across the shaft packing
D.open, and only slight leakage permitted across the shaft packing
最新試題
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）
A grease gun is generally used to lubricate a （）.
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（）.
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
Which of the listed pumps is NOT a positive displacement pump?（）
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?（）
One cause of high head pressure occurring in a refrigeration system can be （）.