單項(xiàng)選擇題Which of the following conditions may contribute to the formation of deposits on the blades of the turbocharger turbine?()

A.Poor combustion
B.High cylinder oil consumption
C.Leaking exhaust valves
D.All of the above


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1.單項(xiàng)選擇題Which of the following problems should be taken when cleaning the air filter on a diesel engine equipped with a turbocharger?()

A.Reduce engine speed to idle before removing the filter
B.Soak the dirty filter in kerosene only
C.Blow out the air inlet with compressed air
D.Cover the air inlet after removing the filter

2.單項(xiàng)選擇題Which of the following problems may occur if the clearance between a piston and cylinder liner is insufficient?()

A.Excessive wear
B.Scuffing of the liner
C.Piston seizure
D.All of the above

3.單項(xiàng)選擇題When installing rings on a diesel engine piston, you should check the ring()

A.diametrical tension
B.gap clearance
C.radial thickness
D.face thickness

4.單項(xiàng)選擇題If the piston ring gap remains insufficient when installing new rings, youshould()

A.install oversized rings
B.hone the cylinder liner to allow ring installation
C.compress the rings tighter with a compressing tool
D.file the ends of the rings

5.單項(xiàng)選擇題Insufficient end clearance on newly fitted piston rings in a diesel enginewill cause the rings to()

A.jam in the most worn part of the cylinder when the rings expand
B.break in the most worn part of the cylinder when the rings expand
C.wear eccentrically on the side opposite the end gap
D.overheat and jam at the top center on the combustion stroke

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Which one is NOT the ‘clear grounds’ for a more detailed inspection?()

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

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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.

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When does auxiliary burner of incinerator put into operation? ()Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish

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Using a file without a handle may result in ()

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Diesel engine air start system check valves are opened by ()

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If two A.C.generators are to be operated in parallel, the load is distributed evenly by()

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()are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.

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The condensers located in various stages of a flash evaporator are cooled by()

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

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