单选题Which of the following conditions would cause carbon deposits to form in the piston ring belt of a diesel engine?（）Afaulty combustionBexcessive ring temperatureCover lubricationDall of the above
单选题
Which of the following conditions would cause carbon deposits to form in the piston ring belt of a diesel engine?（）
A
faulty combustion
B
excessive ring temperature
C
over lubrication
D
all of the above
参考解析
解析：
暂无解析
相关考题：
The appearance of nimbostratus clouds in the immediate vicinity of a ship at sea would be accompanied by which of the following conditions?______.A.Rain and poor visibilityB.Dropping barometric pressure and backing wind in the Northern HemisphereC.High winds and rising seaD.Severe thunderstorms
After swapping an internal wireless card on a laptop with an identical model, the technician notices that the wireless does not work. Which of the following would be the MOST likely cause?() A. Antennae is not connectedB. Wireless card is defectiveC. Drivers needs to be updatedD. OS needs to be updated
In the OSI model, which of the following layers would be the cause of a session time－out while browsing the web?() A.Laye r2B.Layer 3C.Layer 5D.Layer 7
A tank has been sealed and unventilated(不通风的) for a long period of time. Which of the following conditions does this indicate?A.The tank is safe to enterB.The tank is especially dangerous to enterC.Carbon monoxide(一氧化物) is presentD.Water vapor present when the tank was sealed has oxidized(使氧化)
Which of the following is or was an example of representative full-bodied money？（ ）。A.Debt moneyB.ATS accountC.Gold certificateD.Demand deposit
You are trying to deploy a configuration job to an ios access point using the wlse， but the job fails. Which of the following would cause this failure？（）A、snmp communitiesB、telnet/ssh user/passwordC、wlccp credentialsD、http user/password
Which of the following bottlenecks would MOST likely cause excessive hard drive activity?（）A、Inadequate RAMB、Slow processorC、PCI busD、Excessive network traffic
Which of the following types of media would MOST likely cause above normal amounts of machine jamming？（）A、EnvelopesB、Colored mediaC、LetterheadD、Pre punched
Bob, a technician, is troubleshooting a PC that intermittently does not power on. Which of the following tools would be the BEST choice to use to verify a possible cause? （）A、Cable testerB、Ohm meterC、Field strength meterD、PSU tester
After swapping an internal wireless card on a laptop with an identical model, the technician notices that the wireless does not work. Which of the following would be the MOST likely cause?（）A、Antennae is not connectedB、Wireless card is defectiveC、Drivers needs to be updatedD、OS needs to be updated
A user reports that their UPS is making a loud beeping sound. Which of the following would cause this problem?（）A、The UPS is overcharged.B、Incorrect wattage on the power supply.C、The UPS battery is not charged.D、The UPS is in power management mode.
After running the vmstat command， which of the following would most likely cause the value in the blocked column to be unusually high？（）A、 Kernel threadB、 Too many usersC、 Memory shortageD、 Network contention
单选题Which of the following bottlenecks would MOST likely cause excessive hard drive activity？（）A Inadequate RAMB Slow processorC PCI busD Excessive network traffic
单选题Which of the conditions listed would cause simultaneous high cylinder firing pressure and low exhaust temperature?（）AImproper fuel rack positioningBLengthy opening of the exhaust valveCExcessively early injection timingDExtended light load operation
单选题Which of the following would cause a diesel to have black smoke?（）Aleaky injectorBwater in the gasCtoo heavy oilDwater in the oil
单选题You are trying to deploy a configuration job to an IOS access point using the WLSE， but the jobfails. Which of the following would cause this failure？（）ASNMP communitiesBTelnet/SSH user/passwordCWLCCP credentialsDHTTP user/password
单选题Which of the listed conditions can be considered as the single greatest cause of accidents?（）ASpeedBExcessive knowledge or skillCHuman errorDExcitement
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Which of the following electric motors would be the safest and most reliable to use on the main deck of a vessel in foul weather conditions?（）ASealed motorsBDrip proof motorsCEnclosed motorsDWatertight motors
单选题Which of the following conditions could be a cause of excessive fuel dilution of diesel engine lube oil?（）ALeaking fuel injectorsBLower than normal compressionCDelayed fuel injectionDAll of the above are correct
单选题If the turbocharger failed on an auxiliary diesel engine, which of the following conditions would probably occur?（）AFull power cannot be developedBThe exhaust will contain black smokeCComplete combustion will be impossibleDAll of the above
单选题Which of the following conditions can cause above normal air temperature to develop in the intake manifold of a four-stroke/cycle turbo-charged diesel engine?（）AClogged air intake faltersBPiston blow-byCA defective after-coolerDFaulty exhaust valves
单选题Which of the following conditions can cause below normal air pressure in the intake manifold of a turbocharged diesel engine?（）AExcessive piston blow-by to the manifoldBInsufficient cooling water flowCAccumulated water in the air boxesDClogged air intake filters
单选题Which of the following conditions could cause the feed pump for an auxiliary boiler to lose suction?（）AIncreased suction head pressureBDecreased feedwater temperatureCPump recirculating line being open too muchDExcessive feedwater temperature
单选题Which of the following operational conditions will occur to the diesel engine lube oil at extremely high temperature?（）AThe oil oxidizes and forms carbon depositsBThe viscosity increasesCEngine oil consumption decreasesDLubricating qualities of the oil are enhanced
单选题Why should you wear a self-contained breathing apparatus before entering the engine room after the fixed CO2 system has been discharged to combat a major fire?（）ABecause carbon dioxide dilutes the oxygen concentration in the atmosphere and may cause asphyxiationBBecause carbon dioxide breaks down in a fire into carbon monoxide which may cause blood poisoning in the person breathing this gasCBecause carbon dioxide is a colorless and odorless gas that becomes highly toxic in the presence of high temperatures and will quickly incapacitate a person exposed to this gasDThis action is unnecessary as carbon dioxide is not poisonous nor toxic but is a relatively harmless gas