A、downwards；upwards
B、upwards；downwards
C、downwards；downwards
D、upwards；upwards
更多“In an engine with air inlet valve and exhaust valve on its cylinder heads the fresh air will enter into the cylinder （） and the gases exhaust （）, there being an adequate overlap between the inlet opening and the exhaust closing.”相关的问题
A、Diesel engines have more advantages in comparison with gasoline engines B、Diesel engines have more advantages in comparison to gasoline engines C、Gasoline engines have more advantages in comparison with diesel engines D、Gasoline engines have more advantages in comparison to diesel engines
A、the engineer officer in charge of watch B、the deck officer in charge of watch C、the master D、the chief mate
A、those with diesel engines B、all those with gasoline engines C、those with large engines only D、None of the above
A、one engine ahead and one engine astern，with full rudder B、one engine ahead and one engine astern，with rudders amidships C、both engines ahead，with full rudder D、both engines astern，with full rudder
A、engine trails should be done after finishing the operation of turning the engine with the turning gear and starting the engine on air briefly B、in the operation of engine trails, the main engine should be running in low-speed C、As to the ship equipment with twin main engine, engine trials should be done with one engine ahead and another engine astern at the same time D、the order “engine trials” should be given by the bridge
A、A.one engine ahead and one engine astern，with full rudder B、B.one engine ahead and one engine astern，with rudders amidships C、C.both engines ahead，with full rudder D、D.both engines astern，with full rudder
A、a system with a Hydraulic Power Supply (HPS) unit B、a system with roller guides for exhaust valves C、a system with an electronically controlled Alpha Lubricator D、a system directly powered by electric motor
A、decrease in ignition lag B、increase in fuel economy C、reduction in lube oil viscosity D、increase in cylinder misfiring
A、A large change of viscosity occurs with a minor change in temperature B、No change in viscosity occurs with any change in temperature C、Very little change in viscosity occurs with a significant change in temperature D、The viscosity of the oil increases with an increase in temperature
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