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单选题
Of a kind of liquid is used to cool the diesel engine, it is invariably called （）
A
lubricant
B
coolant
C
combustion product
D
second refrigerant
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principleB
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cylinder headsB
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the diesel fuel used having a high viscosityC
mechanical rigidity in the lube pump mechanismD
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单选题If a crankcase explosion occurs in a diesel engine, you should stop the engine and（）A
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allow the engine to cool naturallyD
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单选题Bridge gauge can be used to measure （） of a diesel engine.A
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deflections of crankwebsC
diameters of crankpinsD
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Between；more commonlyB
Among；the most commonlyC
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volute pumpB
centrifugal pumpC
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Apply fire fighting water through the crankcase breatherC
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Assume that there is no damage to the crankshaft
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