单选题The expansion tank in a diesel engine closed freshwater cooling system is located at ()Athe highest point in the systemBthe lowest point in the systemCnear the floorDplate level or near the tank top level

单选题
The expansion tank in a diesel engine closed freshwater cooling system is located at ()
A

the highest point in the system

B

the lowest point in the system

C

near the floor

D

plate level or near the tank top level


参考解析

解析: 暂无解析

相关考题:

An alarm device inserted between the deaerating tank and the expansion tank can notify the on-watching crew that .A.the expansion tank is lack of waterB.the expansion tank is over flowingC.there is something wrong with the cooling systemD.there is something wrong with the engine

In a diesel engine closed freshwater cooling system, the amount of coolant flowing through the heat exchanger is controlled by the __.A.suction pressure regulatorB.thermostatic bypass valveC.sea water temperatureD.water level in the expansion tank

The main propulsion diesel engine jacket water temperature rises above normal, with the raw sea suction and the expansion tank water level being normal. Which of the following problems is most likely the cause?A.Faulty thermostatic bypass valveB.Eroded zinc pencils in the heat exchangerC.Steam formation in the expansion tankD.Excessive leakage from jacket water pump seals

Because the circulating water is in a closed loop,_______is installed to cater for expansion and contraction of the water at different conditions of operation.A.an expansion jointB.a drain tankC.a head tankD.a contraction tank

单选题Which of the following statements describes the function of an expansion tank in a diesel engine cooling system?()AMaintains a constant head on the systemBReduces the likelihood of air or steam pockets formationCProvides a low pressure point for the addition of makeup cooling waterDAll of the above

单选题If the coolant temperature of a closed cooling water system for a diesel engine gradually increases, the trouble usually is ()Aa broken shaft on the freshwater pumpBan excessive accumulation of scale exchangerCan incorrect thermostatic element operating rangeDlube oil in the cooling water

单选题Diesel oil may be used to cool () of a diesel engine.AcylindersBexhaust valvesCpistonsDfuel valves

单选题The device allowing for the change in volume of the cooling water in a propulsion diesel engine closed cooling system is the ().Afresh water expansion tankBsea water expansion tankCthermostatic expansion valveDjacket water cooler accumulator

单选题Before starting a diesel engine that has an engine driven lube oil pump, the engineer should ().Aopen the bypass lineBcut in the lube oil coolerCpressurize the lube oil systemDtop off the expansion tank

单选题The main propulsion diesel engine jacket water temperature rises above normal, with the raw water sea suction and the expansion tank water level being normalWhich of the following problems is most likely the cause?()AFaulty thermostatic bypass valveBEroded zinc pencils in the heat exchangerCSteam formation in the expansion tankDExcessive leakage from jacket water pump seal

单选题Which of the listed diesel engine operating conditions should be checked immediately after any diesel engine is started?()AExhaust temperatureBLube oil levelCLube oil pressureDWater level in the expansion tank

单选题In a closed cooling system for a turbocharged, four-stroke/cycle diesel engine, fluctuating water pressure can be caused by ()Aimproper venting of the cooling systemBcarrying the expansion tank water level too highCa totally clogged impeller in the cooling water pumpDan incorrectly set cooling system temperature control

单选题The expansion tank for a diesel engine closed cooling system is designed to maintain a constant head on the system and ().Areduce water temperatureBreduce water turbulenceCprovide an air cushionDallow for an increase in water volume as the engine warms up

单选题The outlet from an expansion tank of a closed freshwater cooling system should be piped to the ().Acylinder head water outlet headerBcylinder jacket inlet mainCheat exchanger inlet connectionDjacket water pump suction line

单选题The highest pressure in any closed diesel engine freshwater cooling system is at the ().Ajacket water outletBexpansion tank inletCheat exchanger inletDcooling water pump outlet

单选题During the diesel engine running, the water level of FW expansion tank should normally kept in the () level of glass tube.Athe highestBabove 3/4C1/2-3/4Dthe lowest

单选题If a crankcase explosion occurs in a diesel engine, you should stop the engine and()Aimmediately open all crankcase relief portsBincrease crankcase exhauster speed to draw cool air into the engineCallow the engine to cool naturallyDincrease crank case scavenge air to remove unburned gases

单选题If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a ().Aloss of suction in the circulating pumpBleak in the primary cooling systemCbroken raw water pump shaftDburned or cracked piston in one cylinder

单选题In a closed diesel engine freshwater cooling system, the amount of coolant flowing through the heat exchanger is controlled by the ().Asuction pressure regulatorBthermostatic bypass valveCsea water temperatureDwater level in the expansion tank

单选题During the diesel engine running, the water level of F.W expansion tank should normally kept in the () level of glass tube.Athe highestBabove 3/4C1/2 -3/4Dthe lowest

单选题How dose water enter the crankcase of a diesel engine?()AThrough the crankcase exhausterBAs water vapor contained in blow-byCDemulsifying lube oil passing through the main bearingsDCondensation from vapor formed in the expansion tank

单选题Of a kind of liquid is used to cool the diesel engine, it is invariably called ()AlubricantBcoolantCcombustion productDsecond refrigerant

单选题Operating a diesel engine for prolonged periods, with a closed freshwater cooling system, at temperatures lower than the normal design temperature can cause ().Athe formation of sulfuric acidBa decrease in lube oil viscosityCa decrease in cooling water pHDa thermostat failure

单选题Prior to starting most medium-speed propulsion diesel engines, which of the procedures listed should be observed?()AThe expansion tank should be topped offBThe thermostatic water regulating valves should be manually openedCThe fuel filters should be changedDThe engine should be turned over slowly with the indicator cocks open

单选题In any diesel engine closed freshwater cooling system, the lowest pressure exists at the ().Ajacket water outletBcooling water pump outletCheat exchanger outletDexpansion tank atmospheric vent

单选题A faulty thermostatic bypass valve, in a diesel engine cooling system, can result in ()Aexcessive time required for warming-upBexcessive freshwater corrosionCscale formation on the saltwater sideDsaltwater mixing with the freshwater

单选题The jacket water temperature in a diesel engine closed freshwater cooling system is normally controlled by ()Aregulating the level of corrosion inhibitor in the primary cooling systemBthe level of the freshwater expansion tankCvarying the engine load to meet temperature requirementsDthe operation of the thermostatic valve