单项选择题

When attempting to restart a warm high-speed engine, which of the following reactions can you expect?（）

A.Excessive fuel
B.Higher than normal temperatures for star up
C.Longer starting periods
D.Higher than normal lube oil pressure

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单项选择题

An increase in the load on a turbocharged diesel engine operating at constant speed will result in an increase in （）

A.exhaust
B.air box pressure
C.brake main effective pressure
D.all of the above

单项选择题

Which of the following procedures should be carried out to permit the use of a crosshead engine with an inoperable after-cooler?（）

A.Bypass the after-cooler to operate at speed
B.Run at reduced speed until the cooler can be repaired or renewed
C.Switch to diesel fuel and run at full speed
D.Nothing need to be done due to the low heating value of heavy fuel

单项选择题

If cooling water flow through the after-cooler is interrupted,the power output of a turbocharged diesel engine will drop because the （）

A.turbocharger will stall
B.density of the air charge will decrease
C.scavenge effect will increase
D.exhaust pressure will increase