Ⅰ+Ⅱ
Ⅱ+Ⅲ
Ⅲ+Ⅳ
Ⅰ+Ⅳ
第1题：
The purpose of treating the cooling water of the diesel engine is to______. I、 resist the scale formation in the cooling chamber II、lubricate the engine part II III、increase thermal capacity IV、 resist corrosion
A.I + II
B.II + III
C.III + IV
D.I + IV
第2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3题：
If the coolant temperature of a closed cooling water system for a diesel enginegradually increases, the trouble usually is( ).
A.a broken shaft on the freshwater pump
B.an excessive accumulation of scale in the heat exchanger
C.an incorrect thermostatic element operating range
D.lube oil in the cooling water
第4题：
a dirty lube oil strainer
internal water leaks
an oil suction line restriction
excessive wears of the cooling water pump
第5题：
fresh water expansion tank
sea water expansion tank
thermostatic expansion valve
jacket water cooler accumulator
第6题：
The purpose of treating the cooling water of the diesel engine is to____. I、 resist the scale formation in the cooling chamber II、 lubricate the engine part III、 increase thermal capacity IV、 resist corrosion
A.I +II
B.II + III
C.III + IV
D.I +IV
第7题：
a broken shaft on the freshwater pump
an excessive accumulation of scale exchanger
an incorrect thermostatic element operating range
lube oil in the cooling water
第8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9题：
reduce lube oil temperature
raise exhaust temperature reduce
excessive heating of engine room
reduce load on cooling water pump
第10题：
around the engine
around the cooler
to the expansion tank
overboard