If the engine is naturally aspirated, or is a small high-speed type with a centrifugal turbocharger, the period of valve overlap(),ie when both valves are(), will be and the exhaust valve will close some 10°top dead canter().
相似题目
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If the detergent type lubricating oil being used in a diesel engine is black, the oil ()
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If the speed of a turbocharged diesel engine is maintained constant the turbocharger speed will ()
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If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will()
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Which of the following conditions is realized by the turbo-charging of a previously naturally aspirated diesel engine?()
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If a diesel engine fails to start,one of the likely causes is ()
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If a diesel engines exhaust temperature is abnormally high, the cause could be()
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If water is found in the crankcase of a diesel engine, the cause may be due to()
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On a diesel engine equipped with an isochronous governor, if the “speed droop” control is reduced to the “zero” setting, the engine ()
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Which of the following problems may occur if the opening pressure of a fuel injection nozzle is greater than specified by the engine manufacturer?()
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If an air compressor is used to supply compressed air to outlets throughout the engine room and on deck of a vessel, the system is known as the ().
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If a single cylinder relief valve on a diesel engine lists frequently while the engine is running, the cause may be an ()
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If a diesel engine runs roughly, which of the systems listed is most likely to be at fault?()
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If a four-stroke/cycle diesel engine is running at 1550 RPM, the speed of the camshaft will be().
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() can be found on most medium to large merchant vessels even if the main engine is either a steam turbine or 2-stroke crosshead engine.
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The power output of a turbocharged diesel engine will drop if the cooling water flow through the after-cooler is interrupted because the ().
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If a diesel engine is smoking excessively under load, the cause could be ()
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If an auxiliary diesel engine temperature is higher than normal ,but the thermostat is determined not to be defective you would suspect a /an ()
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Charging-air pressure increases if there is incorrect combustion and drop in the () of the diesel engine.
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During the running of the diesel engine, if the supply of cooling water is interrupted or the temperature of cooling water out of the cylinder is too high, the duty engineer should ()
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If the coolant temperature of a closed cooling water system for a diesel engine gradually increases, the trouble usually is ()
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If you suspect a diesel engine is misfiring due to air leakage into the fuel system, you should begin looking for the leak at the ()
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Which of the following conditions will develop if the flow of ‘raw’ cooling water to diesel engine is obstructed?()
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If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the ().
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If the scavenge fire is of a more major nature, if there is a risk of the fire extending or if the scavenge trunk is adjacent to the crankcase with risk of a hot spot developing it sometimes becomes necessary to ()the engine.
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