A . unusually solid welded
B . never be solid forged
C . almost invariably solid forged
D . almost invariably be welded
[单选题]On a medium-speed main propulsion diesel engine, the crank-pin or crank journalbearings receive lubricating oil from( ).A．a spindle lubricatorB．an oil jetC．internal splashingD．drilled passages in the crankshaft
[单选题]The majority of medium speed and high speed marine diesel engines for main or auxiliary drive operate on the （） cycle.A . two-strokeB . four-stokeC . long-strokeD . short-stroke
[单选题]Most medium and slow speed diesels are started by what medium?（）A . Electric starting motorsB . HydraulicsC . Compressed airD . Ether
[单选题]On a medium-speed main propulsion diesel engine, the crank-pin or crank journal bearings receive lubricating oil from （）.A . a spindle lubricatorB . an oil jetC . internal splashingD . drilled passages in the crankshaft
[单选题]Pistons of marine medium speed diesel engines may be made of （） in order to keep the weight down for balancing purpose at high speed.A . leadB . forged steelC . alloy steelD . aluminum alloy
[单选题]On a turbo-charged, medium-speed diesel engine, which of the following problems is an indication of a restricted air intake passage?（）A . Engine is hard to startB . Engine missesC . Surges at governed RPMD . Coolant temperature is too low
Cylinder lubrication oil for low speed main propulsion diesel engines is admitte
On a medium-speed main propulsion diesel engine, the crank-pin or crank journalb
Most large, low-speed, main propulsion diesel engines use duplex lube oil strain
[单选题]Passages are drilled in the crankshafts of diesel engines to provide lubricating oil to the （）.A . main bearingsB . connecting rod bearingsC . piston pin bushingsD . All of the above