facilitate bi-directional operation
provide the greatest pump efficiency
prevent pump clogging from marine growth
prevent cavitation at the pump outlet
第1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2题：
reduce lube oil temperature
raise exhaust temperature reduce
excessive heating of engine room
reduce load on cooling water pump
第3题：
The cooling water of the diesel engine should be treated with chemical, because it contains .
A.alkali
B.acidity
C.salinity
D.impurity
第4题：
air binding of the engine cooling system
a cracked water cooled exhaust manifold
blockage in the heat exchanger
faulty operation of the thermostat
第5题：
a dirty lube oil strainer
internal water leaks
an oil suction line restriction
excessive wears of the cooling water pump
第6题：
fresh water expansion tank
sea water expansion tank
thermostatic expansion valve
jacket water cooler accumulator
第7题：
Ⅰ+Ⅱ
Ⅱ+Ⅲ
Ⅲ+Ⅳ
Ⅰ+Ⅳ
第8题：
High diesel engine cooling water temperatures can be caused by ______.
A.air in the cooling system
B.an overhauled water pump
C.correct amount of coolant
D.no air in the cooling system
第9题：
Cooling water is alkalescence
cooling water is acidity
cooling water has salinity
cooling water has impurity
第10题：
starting air and fuel pumps
piston cooling pumps
exhaust valves
all of the above