单选题The cooling liquid used for the cylinder may be referred to as ().Ajacket waterBmake-up waterCboiler waterDflushing water

单选题
The cooling liquid used for the cylinder may be referred to as ().
A

jacket water

B

make-up water

C

boiler water

D

flushing water


参考解析

解析: 暂无解析

相关考题:

The space between cylinder liner and jacket is called _____.A.the cooling waterB.the circulating waterC.the coolerD.the cooling water space

The cooling liquid used for the cylinder may be referred to as _____.A.jacket waterB.make-up waterC.boiler waterD.flushing water

Piston cooling fins are locatedA.atop the piston crownB.beneath the piston crownC.at the base of the piston skirtD.inside the cylinder liner cooling water jacket

第一组Older loop scavenged engines may have a single injector mounted centrally in the cylinder head. Because the exhaust valve is in the center of the cylinder head on modern uniflow scavenged engines the fuel valves (2 or 3) are arranged around the periphery of the head. The pressure at which the injector operates can be adjusted by adjusting the loading on the spring. The pressures at which the injectors operate vary depending on the engine, but can be as high as 540 bar. Some injectors have internal cooling passages in them extending into the nozzle through which cooling water is circulated. This is to prevent overheating and burning of the nozzle tip. Injectors on modern engines do not have internal cooling passages. They are cooled by a combination of the intensive bore cooling in the cylinder head being close to the valve pockets and by the fuel which is re-circulated through the injector when the follower is on the base of the cam or when the engine is stopped. As well as cooling the injector, re-circulating the fuel when the engine is stopped keeps the fuel at the correct viscosity for injection by preventing it from cooling down. Fuel injectors must be kept in good condition to maintain optimum efficiency, and to prevent conditions arising which could lead to damage within the cylinder. Injectors should be changed in line with manufacturers recommendations, overhauled and tested. Springs can weaken with repeated operation leading to the injector opening at a lower pressure than designed. The needle valve and seat can wear which together with worn nozzle holes will lead to incorrect atomization and dribbling.Modern uniflow scavenged engines have______.A.a single injector mounted in the center of the cylinder headB.several injectors mounted around the external boundary of the cylinder headC.a single injector mounted at the external boundary of the cylinder headD.several injectors mounted in the center of the cylinder head

The pressure of a liquid leaving the pump can be referred to as the ______.A.total headB.discharge headC.net positive suction headD.suction head

One cylinder of a diesel engine is persistently knocking and does not cease(停止) when the fuel supply to that cylinder is secured.Which of the following problems may be the cause?A.Low loading of the cylinderB.Excessive cooling of that pistonC.Sluggish ring action on the pistonD.A mechanical defect in a working part

Chemical Tankers are generally referred to the cargo ships constructed or adapted and used for the carriage of ________ .A.liquid chemicals in bulkB.solid chemicals in bulkC.chemicals in bulkD.cargoes in bulk

Which of the following passive cooling methods BEST dissipates a component’s heat?()A、HeatsinkB、FanC、Liquid coolingD、Compressed air

Which of the following would BEST provide cooling to a processor?()A、Case fanB、HeatsinkC、Liquid cooling systemD、CPU fan

单选题Cooling of engine is achieved by circulation a cooling liquid around internal passages within the ().AboilerBheaterCengineDcooler

单选题You are ordering ship’s stores. Which statement is TRUE?().AStores such as line,rags,mattresses,linens,etc. must be treated to be fire retardantBStores certified for use on uninspected vessels may be identified by the certification number used by Underwriter's LaboratoriesCA portable container of a flammable liquid used as fuel for portable auxiliary equipment must be stowed in a paint locker or at a designated open locationDAcetylene may be in a ship's storeroom in quantities not exceeding 6000 cubic feet

单选题Improper cooling of a diesel engine cylinder liner due to the accumulation of scale deposits may cause ().Alow compression pressureBincreased piston wearCincreased cylinder lube oil consumptionDpoor contact between compression rings and liner

单选题Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?()AA shortage of liquid refrigerantBExcessive frost on the evaporatorCExcessive condenser cooling waterDInsufficient condenser cooling water flow

单选题You are on a container vessel. What concerning the handling and stowage of containerized hazardous materials is TRUE?().AOpen-bed containers may be used to transport hazardous materials if the cargo is properly securedBA portable cargo tank of a flammable,cryogenic liquid may not be in transit for a period exceeding its marked rated holding time unless the liquid is inhibitedCA portable cargo tank containing a cryogenic liquid must be shipped on deck unless forced ventilation is provided to the tween-decksDA container loaded with packages of tear gas would display a placard reading Irritant

单选题The cooling liquid used for the cylinder may be referred to as ().Ajacket waterBmake-up waterCboiler waterDflushing water

单选题Low cylinder compression pressure and a high exhaust temperature may indicate ()Aearly fuel injection timingBleaking valvesCa continuously open scavenge air portDlow cooling water temperature

单选题() is used for cylinder and cylinder head, the salt water is used for cooling the lubricating oil, the fresh water in the coolers and the charging air in the air cooler.AThe fuel oilBThe lube oilCThe sea waterDThe fresh water

单选题Cylinder liner cooling is often referred to as ().Apiston coolingBsleeve coolingCcentral coolingDjacket cooling

单选题Cylinder liners from older lower powered engines had a uniform wall thickness and the cooling was achieved by circulating cooling water through a space formed between ().Acrown and skirtBliner and jacketCring and grooveDjacket and block

单选题Persistent knocking of one cylinder of a diesel engine ceases when the fuel supply to that cylinder is securedThis problem may be a result of ()Alow loading of that cylinderBfaulty combustion in that cylinderCsluggish piston ring actionDexcessive piston cooling

单选题Which of the listed statements is correct concerning refrigeration systems?()ADehydrators must be used continuously in a refrigeration systemBA 25 ton refrigeration system has the same cooling effect as melting 25 tons of ice in 24 hoursCA thermostatic expansion valve is used to control refrigerated space temperatureDThe liquid receiver functions to collect and remove non- condensable gases

单选题There is a support ring between the cylinder block and collar of the cylinder liner, thus carrying both the liner and the cylinder coverIt also passes to the cooling bores and to the cover()Acooling waterBcooling oilCrefrigerantDlubricate oil

单选题The pressure of a liquid leaving the pump can be referred to as the ().Atotal headBdischarge headCnet positive suction headDsuction head

单选题Cracks in cylinder and cylinder covers may () from unequal heating.AmakeBcauseCresultDproduce

单选题The piston cooling system may employ similar components, except that () is used instead of a head tank.Aa sump tankBa feed wellCa double bottom tankDa drain tank

单选题To minimize the formation of carbon deposits on fuel injection nozzles, you should ()Aavoid using liquid-cooled nozzles whenever possibleBavoid low cooling water temperaturesCavoid prolonged overloading of the engineDmake certain the gasket seal between the nozzle and cylinder head is tight

单选题Fresh water is used for the cooling of cylinder jackets and () of the marine diesel engine.Acylinder coversBlubricating spaceCcrossheadDexhaust manifold

单选题Piston cooling fins are located()Aatop the piston crownBbeneath the piston crownCat the base of the piston skirtDinside the cylinder liner cooling water jacket