單項(xiàng)選擇題Following the failure of one turbocharger on a large, crosshead, main propulsion diesel engine, fitted with multiple turbochargers, which of the following actions should be taken prior to further operation of the engine? ()

A.Blank off the exhaust gas inlet to the damaged turbocharger
B.Secure cooling and lubrication to the damaged turbocharger
C.Lock the rotor of the damaged turbocharger
D.All of the above


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1.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

2.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

3.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

4.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

5.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

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