大沟(major groove)和小沟(minor groove)
大沟(major groove)和小沟(minor groove)
相关考题：
Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?A.Control the amount of lube oil burned in the combustion chamberB.Transmit heat from the piston to the cylinder linerC.Prevent damage to ring groove inserts by acting as a heat damD.Dissipate combustion chamber gas pressure by channeling it through the ring gap
“行李内有哪些主要物品?”的英文为( )A.What are the major problems in your baggage?B.What are the major articles in your baggage?C.What are the minor articles in your baggage?D.What are the articles in your baggage?
During the installation of the groove,the total cross-sectional area of the conductor including insulation in the same groove shall not exceed the inner cross-sectional area of the groove.（ ）。在线槽安装过程中，同一线槽内包括绝缘在内的导线截面积总和应该不超过线槽内部截面积的（ ）。A.20%B.40%C.60%D.80%
“行李内有哪些主要物品？”的英文为（）A、What are the major problems in your baggage？B、What are the major articles in you rbaggage？C、Whatare the minor articles in your baggage？D、What are the articles in your baggage？
单选题If the piston groove drain holes for the oil control rings become clogged, which of the following is likely to occur?（）AThe oil control rings will seal improperly and wear rapidlyBThe piston will overheat due to insufficient lubricationCExcessive oil will remain on the cylinder wallDLight brown smoke will emanate from the engine exhaust
单选题A diesel engine piston ring face is in direct contact with the （）.Atop of the ring grooveBcylinder liner oil filmCbottom of the ring grooveDback of the ring groove
单选题Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?（）AControl the amount of lube oil burned in the combustion chamberBTransmit heat from the piston to the cylinder linerCPrevent damage to ring groove inserts by acting as a heat damDDissipate combustion chamber gas pressure by channeling it through the ring gap
单选题Which of the listed devices could be used as a ring groove tool during preparation for the installation of new rings?（）ASteel brushBFine emery cloth or steel woolCA section of the removed compression ringDA case hardened scraper
单选题If the compression rings on a diesel engine piston become stuck in the ring groove, the cause may be due to（）Aexcessive ring actionBexcessive ring temperatureCimproper ring rotationDexcessive ring face wear
单选题The sealing function of the piston ring is brought about by the gas pressure above and behind the piston ring, which forces it （） against the bottom of the ring groove, and （） against the cylinder wall.Aupwards；inwardsBupwards；outwardsCdownwards；inwardsDdownwards；outwards
单选题Ring groove inserts are occasionally used on aluminum alloy piston to（）Areduce the ring groove wear rateBseal against crankcase vaporsClessen the wear on aluminum part of the cylinderDallow for the greater expansion rate of aluminum
单选题Broken piston rings manifest themselves during the scavenge port inspection by（）ALack of elastic tension, when the rings are pressed into the groove by means of a stickBBlackish appearanceCFractured rings and missing ringsDall off the above
名词解释题大沟(major groove)和小沟(minor groove)