單項選擇題Fuel oil discharged to the diesel engine cylinder is atomized at the ()

A.turbocharger
B.injection nozzle tip
C.carburetor
D.fuel oil pump


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1.單項選擇題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

2.單項選擇題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

3.單項選擇題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

4.單項選擇題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

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Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?()

題型:單項選擇題

By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a()

題型:單項選擇題

The additional mark ()in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.

題型:單項選擇題

Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?()

題型:單項選擇題

Engine parameters shall be corresponded to NOx Technical Files. This is required by ()

題型:單項選擇題

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題型:單項選擇題

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題型:單項選擇題

The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated()

題型:單項選擇題

The treatment of the fuel oils involves storage, heating, filtering and()

題型:單項選擇題

As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?()

題型:單項選擇題