单选题Excessive circulation of the lubricating oil with the refrigerant in a refrigeration system will cause （）.Acarbon deposits on the compressor suction valvesBthe evaporator temperature to increaseCrapid corrosion of the thermal expansion valveDno operating problems
单选题
Excessive circulation of the lubricating oil with the refrigerant in a refrigeration system will cause （）.
A
carbon deposits on the compressor suction valves
B
the evaporator temperature to increase
C
rapid corrosion of the thermal expansion valve
D
no operating problems
参考解析
解析：
暂无解析
相关考题：
If a used lube oil analysis indicates excessive chromate content, this meansA.air filtration is inadequateB.engine coolant is leaking into the lube oilC.fuel oil is leaking into the lube oilD.the piston rings are excessive worn
In an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces_______ .A.all of the oil used by the engine through a filterB.some of the oil used by the engine through a filterC.some of the oil used by the engine through a centrifugeD.all of the oil used by the engine through a centrifuge
Excessive circulation of the lubricating oil with the refrigerant in a refrigeration system will cause______.A.carbon deposits on the compressor suction valvesB.the evaporator temperature to increaseC.rapid corrosion of the thermal expansion valveD.no operating problems
单选题Excessive lube oil consumption by a reciprocating air compressor can be caused by （）.Ausing a slightly dirty air filterBusing oil having an excessive viscosityCintercooler or after-cooler leaksDcarrying the oil level higher than normal
单选题Refrigeration system compressor crankcase sweating is an indication of （）.Ainsufficient lube oil circulating through the systemBexcessive circulation of lube oil through the systemCinsufficient refrigerant in the systemDan overworked compressor
单选题The primary purpose of oil control rings on a diesel piston is to（）Aprovide a reservoir for cylinder lubricationBpump oil into the combustion space for cylinder coolingCprevent excessive lubricating oil consumptionDallow hydraulic oil film formation on the cylinder
单选题One characteristic of a lubricating oil adversely affecting the result of centrifuging is （）Ahigh TBN valueBlow oil floc pointClow oil demulsibilityDlow oil neutralization number
单选题Excessive lubricating oil consumption in a running diesel engine can be caused by （）Aclogged lube oil pipingBexcessive valve-guide clearanceChigh lube oil viscosityDlow lube oil temperature
单选题The amount of lubricating oil in the drain tank should be checked by （）.AmeasuringBsounding rodCmeteringDweighting
单选题When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.Afilter to remove the fuel oilBuse the settler to remove the fuel oilCremove the fuel oil by centrifugingDdrain and then renew the lube oil supply
单选题Which of the following conditions can cause excessive lube oil consumption in a diesel engine?（）ALow lube oil temperatureBDirty lube oil strainerCLow lube oil pressureDHigh lube oil temperature
单选题Two main lubricating oil pumps are usual and are obligatory in （）.Acontainer shipsBbulk carriersCpassenger shipsDbarges
单选题What is one effect of running a diesel engine at too cool a temperature? （）ABuildup of sludge in the lubricating systemBExcessive fuel consumptionCSevere heat stresses on mechanical partsDFoaming of the lubricating oil
单选题Excessive clearances in the main or crank-pin bearings will sometimes be indicated by （） before any bearing knock is heard.Aloss of flow in the fuel systemBloss of pressure in the air systemCloss of flow in the lubricating systemDloss of pressure in the lubricating system
单选题The （）should be kept running for about half an hour after FWE.Acrankcase lubricating oil pumpBfuel oil pumpCair compressorDauxiliary blower
单选题Engine coolant accumulating in the diesel engine lubricating oil can result from a （）Alow oil pressureBhigh coolant pressureCleaking fuel injectorDcracked cylinder head or liner
单选题In a normally operating diesel engine, the main cause of lubricating oil contamination in the crankcase is a result of the （）.Ametal particles loosened by wearBair when no air cleaners are usedCcondensation of water vaporsDbreakdown of the lubricating oil by dilution
单选题（） providing lubricating films, oil used in marine diesel engines have to remove heat from oil cooled piston.AExcept forBBesideCExceptDIn addition to
单选题If a used lube oil analysis indicates excessive fuel dilution, the lube oil should be （）AchangedBcentrifugedCfilteredDsettled
单选题The function of lubricating oil is to （）Amaintain even distribution of bearing wearBmaintain a constant oil temperatureCmaintain a pressurized film between moving surfacesDremove entrained water
单选题Lubricating oil viscosity in an operating diesel engine can be reduced by（）Aincreasing cooling water flowBincreasing lube oil flowCdilution by fuel oilDadding SAE 70 oil
单选题The function of lubricating oil is to （）.Areduce friction between moving surfacesBprovide even distribution of bearing wearCreduce the accumulation of harmful detergentsDmaintain a constant oil temperature output at each beating
单选题Shaker, circulation and spray are the three general methods used in（）Apre-injection fuel oil treatmentBlube oil filtrationClube oil purificationDpiston cooling
单选题Excessive piston ring wear in a diesel engine will cause（）Ahigh lube oil viscosityBincreased lube oil consumptionClow lube oil temperaturesDhigh firing pressures
单选题Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?（）ASplashBGravityCPressureDBypass
单选题The （）pump is usually used as the lubricating oil pump.AturbineBscrewCvaneejectorDcentrifugal