单项选择题

Cavitation erosion in the cooling water system of a diesel engine usually occurs at the pump impeller, and on the waterside of the （）

A.fuel nozzle holders
B.exhaust value guides
C.engine cylinder liners
D.low temperature and a low viscosity

相关考题

Which of the following factors tends to increase scale ...

单项选择题Which of the following factors tends to increase scale formation on the saltwater side of a heat exchanger used in a diesel engine cooling water system?（）

A.Baffle plates that have been bent during prior removal
B.Leaks in the cooler tube nest
C.Operating the engine while maintaining a high sea water outlet temperature
D.A punctured sea water strainer supplying cooling water to the heat exchanger

Gear-type flexible couplings are often used in diesel e...

单项选择题Gear-type flexible couplings are often used in diesel engine drive trains because they（）

A.require no lubrication under normal operating conditions
B.compensate for gross misalignment in the drive train
C.are able to transmit high torque ,even where slight misalignment exists
D.will rapidly disconnect the engine from the line shaft

Keel coolers fouled with marine growth, will result in ...

单项选择题Keel coolers fouled with marine growth, will result in （）

A.higher raw water temperatures
B.higher jacket water temperatures
C.a malfunctioning thermostat
D.higher fuel temperature

船舶电气与船舶安全

Cavitation erosion in the cooling water system of a diesel engine usually occurs at the pump impeller, and on the waterside of the （）