The events of each of  the______ diesel engine are suction，compression，expansion and exhaust.Starting with the piston at the top of the cylinder，the suction stroke is performed as the piston moves down.（ ）

[单选题]Low compression in a diesel engine could be caused byA．worn or broken cylinder liner sealing ringsB．high cooling water temperatureC．worn or broken piston ringsD．low fuel oil pressure

[单选题]The expansion tank for a diesel engine closed cooling system is designed to maintain a constant head on the system and （）.A . reduce water temperatureB . reduce water turbulenceC . provide an air cushionD . allow for an increase in water volume as th

[单选题]Low compression of diesel engine may result from （）A . a worn cylinderB . broken piston ringsC . any of A and BD . none of the above

[单选题]A． two stroke diesel engine exhaust temperature will be lower than a four stroke diesel engine of the same displacement because the _____. ① MEP is lower and the scavenging air is cooling the exhaust gases ② valve overlap in a four strokeA．①B．②C．① an

[单选题]Diesel engine exhaust gas temperatures can be used to determine individual cylinder （）.A . performanceB . horsepower outputC . fuel consumptionD . scavenge effect

[单选题]Diesel engine exhaust temperatures may be used to indicate （）.A . leaking exhaust valvesB . an overloaded cylinderC . a clogged injector nozzleD . all of the above

[单选题]A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the （）(1) MEP is lower and the scavenging air is cooling the exhaust gases(2) valve overlap in a four-strokeA . (1) only is

For an ordinary four-stroke diesel engine the exhaust valves close ( )A. after T

Exhaust gases are generally removed from the cylinders of a two-stroke/cycle die

A piston in a four-stroke/cycle diesel engine makes four strokes during each( )