單項選擇題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


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1.單項選擇題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

2.單項選擇題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

3.單項選擇題Before being shut down, a diesel engine should idle a few minutes in orderto ()

A.prevent governor surging at shutdown
B.make sure the fuel nozzles are flushed clean
C.prevent pressure buildup in the fuel lines
D.prevent damage from localized overheating

4.單項選擇題The main propulsion diesel continues running after you try to shut downYoushould now attempt to()

A.stop the combustion air supply
B.engage the jacking gear
C.secure the lube oil pump
D.shut off the fuel at the day tank

5.單項選擇題Cylinder linings constructed as an integral part of the block, are characterized by which of the following disadvantages?()

A.They conduct heat poorly
B.They are expensive
C.They cannot be replaced
D.They require special tools for removal

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