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单选题
Which of the following conditions is realized by the turbo-charging of a previously naturally aspirated diesel engine?（）
A
Ignition lag increases
B
Lube oil system pressure increases
C
Brake specific fuel consumption increased
D
Mechanical efficiency increaded
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单选题If the turbocharger failed on an auxiliary diesel engine, which of the following conditions would probably occur?（）A
Full power cannot be developedB
The exhaust will contain black smokeC
Complete combustion will be impossibleD
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Increased suction head pressureB
Decreased feedwater temperatureC
Pump recirculating line being open too muchD
Excessive feedwater temperature
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The oil oxidizes and forms carbon depositsB
The viscosity increasesC
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