Most medium and slow speed diesels are started by what medium?（）

[单选题]All marine low-speed diesels are of what design?（）A . Four-strokeB . Two-strokeC . Electronic ignitionD . Forced exhaust

[单选题]Crankshafts of medium speed engines are （） from a single piece of steel.A . unusually solid weldedB . never be solid forgedC . almost invariably solid forgedD . almost invariably be welded

[单选题]In a large, slow-speed, main propulsion diesel engine, which of the parts listed is under tension when the engine is running?（）A . Bed plateB . ColumnC . EntablatureD . Tie rod

[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]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

[单选题]The government’s attempt to inhibit the present speed of inflation is highl

[单选题]Taxes provide most of the government’s _________．A．revenuesB．expensesC．profitsD．rewards