单选题If cooling water flow through the after-cooler is interrupted,the power output of a turbocharged diesel engine will drop because the （）Aturbocharger will stallBdensity of the air charge will decreaseCscavenge effect will increaseDexhaust pressure will increase
单选题
If cooling water flow through the after-cooler is interrupted,the power output of a turbocharged diesel engine will drop because the （）
A
turbocharger will stall
B
density of the air charge will decrease
C
scavenge effect will increase
D
exhaust pressure will increase
参考解析
解析：
暂无解析
相关考题：
If a refrigeration compressor is short cycling on high head pressure, you shouldA.purge the condenser if the waterside is dirtyB.check for proper water flow through the condenserC.increase the high pressure cutout settingD.reduce the cooling water flow
Indirect cooling of fuel injector nozzle holders for diesel engines is accomplished primarily byA.heat conduction into the injected fuel oilB.heat conduction into the water jacket wallC.water circulation through passages in the holderD.fuel oil circulation through passages m the holder
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
Cooling water is circulated through______in some injectors.A.the nozzleB.the nozzle tipC.the internal passagesD.the fuel re-circulated
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?A.A shortage of liquid refrigerant.B.Excessive frost on the evaporator.C.Excessive condenser cooling water.D.Insufficient condenser cooling water flow.
In a chilled(冷的) water air conditioning unit using a reciprocating compressor, the refrigerating effect of the primary refrigerant can be increased by ______.A.increasing refrigerant pressure in the coilB.increasing chilled water flow through the coolerC.sub-cooling the refrigerant in the condenserD.superheating the refrigerant in the compressor
The most serious effect of air trapped in a diesel engine jacket water cooling system is that it ______．A.Causes colloid suspension in the cooling waterB.Reduces the capability of the lubrication systemC.Can form pockets which block the flow of coolant through the systemD.Leads to the scuffing of cylinder walls
Flanking rudders effect a vessel’s heading because of the ______.A.effect of the propeller flow on the ruddersB.water flow due to the vessel’s movement through the waterC.tunnel affect of the water flow past opposing ruddersD.discharge current being channeled to impinge on the vessel’s deadwood
单选题The cooling water jacket is common to all the cylinders but there are often （） to ensure that each cylinder receives the right amount and flow of water.Adividing wallsBdivided wallsCdividing linersDdivided jackets
单选题If a large difference exists between the compressor discharge pressure and the pressure corresponding to the existing condensing temperature in a refrigeration system, you should（）.Aincrease the flow of the cooling water through the condenserBadjust the high pressure cutout to maintain the desired pressureCopen the hot gas bypass temporarily to reduce capacityDpurge non-condensable gases to reduce the excess pressure
单选题If a refrigeration compressor is short cycling on high head pressure, you should （）.Apurge the condenser if the waterside is dirtyBcheck for proper water flow through the condenserCincrease the high pressure cutout settingDreduce the cooling water flow
单选题If the high-pressure switch on the compressor opens and stops the compressor a possible cause could be:（）Atoo much cooling water going through the condenserBnot enough refrigerant in the systemCa leak in the evaporator coilsDno enough cooling water going through the condenser
单选题The （） of the gravity disc is too big It causes oil to flow through the water outletWe changed the disc and no oil is found in the water outlet.AgravityBdiameterCcircumferenceDcylinder
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The diameter of the gravity disc is too big It causes oil to flow through the water outlet We changed the disc and no （） is found in the water outlet.AwaterBoilCscaleDridge
单选题Flanking rudders effect a vessel’s heading because of the（）.Aeffect of the propeller flow on the ruddersBwater flow due to the vessel's movement through the waterCtunnel affect of the water flow past opposing ruddersDdischarge current being channeled to impinge on the vessel's deadwood
单选题The most serious effect of air trapped in a diesel engine jacket water cooling system is that it（）.Acauses colloid suspension in the cooling waterBreduces the capability of the lubrication systemCcan form pockets which block the flow of coolant through the systemDleads to the scuffing of cylinder walls
单选题In a diesel engine, an integral liner is one in which the cooling water （） Ⅰ.flows through the cylinder liner jackets Ⅱ.touches the outer side of the linerAⅠ onlyBⅡ onlyCboth Ⅰ and ⅡDneither Ⅰ and Ⅱ
单选题In a chilled water air conditioning unit using a reciprocating compressor, the refrigerating effect of the primary refrigerant can be increased by （）.Aincreasing refrigerant pressure in the coilBincreasing chilled water flow through the coolerCsub-cooling the refrigerant in the condenserDsuperheating the refrigerant in the compressor
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Because of the reduced （） in the vacuum boiling evaporator, some of the sea water boils as it flows through the tubes.AtemperatureBwater levelCpressureDrate of flow
单选题Which of the following statements is true concerning an oil cooler?（）AThe oil temperature is less than the cooling water temperatureBThe oil pressure is less than the cooling water pressureCThe oil pressure is greater than the cooling water pressureDThe oil flow control valve is always installed in the oil input line
单选题Indirect cooling of fuel injector nozzle holders for diesel engines is accomplished primarily by （）.Aheat conduction into the injected fuel oilBheat conduction into the water jacket wallCwater circulation through passages in the holderDfuel oil circulation through passages in the holder
单选题Temperature control valves installed in the jacket cooling water system of a diesel engine modulates the rate of water flow through the （）.Acooling water pumpBnozzle cooling passagesCcylinder jacketsDheat exchanger
单选题In a shell-and-tube type hydraulic fluid cooler, the amount of heat transferred from the hydraulic fluid to the cooling water depends upon（）Athe temperature of the hydraulic fluidBthe flow rate of the hydraulic fluidCthe temperature of the cooling waterDall of the above
单选题Which of the following conditions will develop if the flow of ‘raw’ cooling water to diesel engine is obstructed?（）AAir will enter the cooling systemBCarbon will plug the water cooled exhaust manifoldsCThe jacket water temperature will riseDThe lube oil viscosity will increase
单选题In the process of the stand-by, warm-up the engine usually through give preheat of which parts of the diesel engine?（）Acooling water of the cooling systemBfuel of the FO systemCLO of the LO systemDcooling water of the cooling system and LO of the LO system