In a diesel engine, offers the heat energy directly（）； works

第1题

单选题If the jacket water temperature in an auxiliary diesel engine cooling system is lower than normal, the probable cause is （）A air binding of the engine cooling systemB a cracked water cooled exhaust manifoldC blockage in the heat exchangerD faulty operation of the thermostat

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第2题

单选题Incomplete combustion in a running diesel engine can cause piston rings to become stuck as a result of （）A residual carbon depositsB lube oil viscosity breakdownC uneven heat expansion of the ringsD uneven heat expansion of the piston

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第3题

单选题（） is a source of power by which the diesel engine may operate.A Water energyB Electrical energyC Chemical energyD Heat energy

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第4题

单选题Increasing the compression ratio of a diesel engine while maintaining the designed rate of fuel flow will result in （）A increased horsepowerB reduced efficiencyC increased heat lossD lower cylinder pressures

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第5题

单选题The exhaust system for a turbocharged two-stroke/cycle diesel engine functions to（）A discharge exhaust gases and smokeB furnish energy to the turbochargerC reduce engine room noiseD all of the above

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第6题

单选题Fuel is ignited in a diesel engine cylinder by （）A a spark plugB injectorsC the heat of compressionD increasing jacket water temperatures

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第7题

单选题A large, low-speed, main propulsion diesel engine uses sea water to directly cool the （）.A cylinder headsB exhaust valvesC scavenging airD injectors

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