[单选题]You are having a blow-by on the main engine, but due to the circumstances, it is impossible to stop and do a piston overhaul. What is the correct action to take?
[单选题]In a compression refrigeration plant the refrigerant flows from the expansion valve and through the______ where it absorbs heat from the space being cooled and becomes a gas or vapor.
[单选题]In comparison to exhaust valves, intake valves of diesel engines may be fabricated from low alloy steels because ( ).
[问答题]Turbocharging is a method by which energy in the cylinder exhaust gas is used to provide air for combustion. Four-stroke cycle engines may operate in a normally aspirated mode, which means that the suction stroke of the piston draws air into the cylinder and so no pressurized air supply is necessary. A two-stroke cycle engine requires air to be supplied at a pressure above atmospheric and so some means of providing that pressurized supply is necessary. A four-stroke cycle engine can, therefore, operate without a pressurized combustion air supply but a two stroke cycle engine cannot. However, the operation of a pressure charged four-stoke engine under non-pressure charged, or nor really aspirated conditions, is not advised as it is likely to result in severe fouling and possible there real damage.
[单选题]The two major items PSCO are able to observe with respect to the OWS functioning correctly are ______.
[单选题]If the flame from combustion in the cylinder of a tow-stroke engine past the piston into the space between the piston and the stuffing box, the accumulation of flammable mixture would be ignited, thus resulting in ____.
[单选题]Electrical supply is always needed even if only for lighting so after a ship goes into service it is extremely rare for the main bus-bars to be dead, it therefore follows that the bus-bars are continuously alive ___ the life of the ship.