On a large diesel engine installation, crankshaft axial alignment is maintained by the ()
A、piston rod guides
B、engine thrust bearing
C、crosshead bearing
D、main shaft flexible coupling
A、piston rod guides
B、engine thrust bearing
C、crosshead bearing
D、main shaft flexible coupling
A、A.large conical springs B、B.compressed air pressure C、C.hydraulic pressure D、D.exhaust gas pressure
A、reduce wear on the valve stem B、permit the use of alloy valve seat materials C、reduce heat transfer from the valve seat D、facilitate valve removal for servicing
A、A.increasing the quantity of starting air B、B.increasing the lube oil pressure C、C.heating the engine fuel supply D、D.heating the engine coolant
A、Plugged injector nozzles B、Excessive fuel injection C、Very late injection timing D、Incorrect crankshaft clearance
A、cooling water leaving each cylinder B、fuel oil entering the injector C、exhaust gases at various locations D、lube oil at the bearing supplies
A、A.The diesel oil must never be allowed to mix with the heavy fuel B、B.The temperature of the fuel from the pre–heater should be gradually reduced after switching over the three–way valve C、C.The heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valve D、D.The heating steam must be secured before the diesel oil passes through the three-way valve