the highest
above 3/4
1/2 -3/4
the lowest
第1题:
Which of the following factors tends to increase scale formation on the saltwater side of a heat exchanger used in a diesel engine cooling water system?
A.Baffle plates that have been bent during prior removal
B.Leaks m the cooler tube nest
C.Operating the engine while maintaining a high sea water outlet temperature
D.A punctured sea water strainer supplying cooling water to the heat exchanger
第2题:
notify the duty officer, reduce the engine speed, take some measures to remove failures
notify the duty officer and stop the engine immediately, find the cause and remove failures
notify the C/E
notify the captain
第3题:
In a diesel engine closed freshwater cooling system, the amount of coolant flowing through the heat exchanger is controlled by the __.
A.suction pressure regulator
B.thermostatic bypass valve
C.sea water temperature
D.water level in the expansion tank
第4题:
Cooling water is alkalescence
cooling water is acidity
cooling water has salinity
cooling water has impurity
第5题:
Baffle plates that have been bent during prior removal
Leaks in the cooler tube nest
Operating the engine while maintaining a high sea water outlet temperature
A punctured sea water strainer supplying cooling water to the heat exchanger
第6题:
stop the engine immediately to prevent damage
increase lube oil pressure
slow the engine allowing it to gradually cool
decrease the cooling water it temperature to the water jacket
第7题:
increasing the quantity of starting air
increasing the lube oil pressure
heating the engine fuel supply
heating the engine jacket water
第8题:
The main propulsion diesel engine jacket water temperature rises above normal, with the raw sea suction and the expansion tank water level being normal. Which of the following problems is most likely the cause?
A.Faulty thermostatic bypass valve
B.Eroded zinc pencils in the heat exchanger
C.Steam formation in the expansion tank
D.Excessive leakage from jacket water pump seals
第9题:
fuel pumps
cylinders
fuel strainers
all of above
第10题:
a low level in the engine expansion tank
excessively high coolant pressure
improper temperatures
malfunctioning of the jacket water heater