单选题A separate piston cooling system is used （） any contamination from piston cooling glands to the piston cooling system only.Ato helpBto limitCto protectDto remove
单选题
A separate piston cooling system is used （） any contamination from piston cooling glands to the piston cooling system only.
A
to help
B
to limit
C
to protect
D
to remove
参考解析
解析：
暂无解析
相关考题：
What is head tank in the closed cooling water system used for?A.for the release of air from the cooling waterB.providing expansion room for heated cooling waterC.a place for implementing water and water treatment agentD.all of the above
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
A segregated ballast system is a system whereA.all ballast is processed through the oily water separatorB.ballast is taken on and discharged through a separate main deckC.ballast and cargo tanks are separated by cofferdamsD.all ballast lines, tanks, and pumps are independent of those used for oil
Which of the following accurately describes the meaning of redundant cooling？（）A、The source of cooling to a RAID systemB、The cooling system in a redundant power supplyC、A cooling system that can be installed in case of failureD、A second cooling system in case of a failure
单选题What is head tank in the closed cooling water system used for?（）Afor the release of air from the cooling waterBproviding expansion room for heated cooling waterCa place for implementing water and water treatment agentDall of the above
单选题An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.Arestriction in refrigerant pipingBair and non-condensable gases in the condenserCwater in the refrigerantDflooding back of liquid refrigerant from the evaporator
单选题A segregated ballast system is a system where （）Aall ballast is processed through the oily water separatorBballast is taken on and discharged through a separate main deck riserCballast and cargo tanks are separated by cofferdamsDall ballast lines, tanks, and pumps are independent of those used for oil
单选题Large marine diesel engines of crosshead construction generally have two systems of lubrication: a total loss system feeding the （） and a recirculation system lubricating the running gear and cooling the piston.Acylinder liners and piston ringsBmain bearingsCcrankpin bearingsDturboblower
单选题What is commonly used to create turbulence in a diesel engine combustion system?（）AShape of the piston crownsBIncreasing the compression ratiosCIncreasing the piston crownsDIncreasing the turbocharger gear ratio
单选题There is a （） system lubricating the running gear and cooling the piston and sometimes lubricating the cylinders.ArecirculatingBtotal lossCcoolingDrefrigeration
单选题In a central cooling system, used in some modem ships, sea water is supplied to cool （）which will circulate to other individual cooler, greatly reducing the corrosion problems.Afresh waterBsea waterCcooling oilDemulsion
单选题（） is sometimes used for piston cooling since leaks into the crankcase would not cause problems.ADiesel oilBHydraulic oilCLube oilDMineral oil
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Which of the following accurately describes the meaning of redundant cooling？（）AThe source of cooling to a RAID systemBThe cooling system in a redundant power supplyCA cooling system that can be installed in case of failureDA second cooling system in case of a failure
单选题As to the piston cooling, of the following, which statement is not true?（）ABecause the piston is exposed to very high temperature, it must be cooledBThe lower the piston cooling temperature is, the better it isCBoth water and lube oil can be used as coolantDOne of the piston cooling methods is vibration cooling, with better effect
单选题A separate piston cooling system is used to limit any contamination （） piston cooling glands（） the piston cooling system only.Abetween；toBeither；orCfrom；toDneither；nor
单选题As an alternative to the conventional seawater cooling system, is based on principles about cooler locations, （）flow control and preheating, but with a central cooler and one additional set of pumps（）.Athe central cooling system, differentBthe central cooling system, the sameCthe open cooling system, differentDthe open cooling system, the same
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The piston cooling system may employ similar components, except that a drain tank is used instead of a head tank That means this system （）.Adoesnt use a drain tank but a head tankBuses a drain tank not head tankCuses a drain tank and a head tankDuses neither a drain tank nor a head tank
单选题Piston compression rings used in a diesel engine function to （）Atransfer heat from the cylinder to the pistonBscrape oil from the sides of the pistonCseal the combustion space from the crankcasesDprevent any piston contact with the cylinder liner
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Diesel engine piston seizure can be caused by （）Apoor cooling of cylinder wallsBimproper cooling of the pistonCinsufficient piston lubricationDall of the above
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There is （） in any water cooling system for a diesel engine allowing for expansion and water make-up in the system as well as air vent and chemicals addition.Aa setting tankBa service tankCa head tankDan expansion joint
单选题In a central cooling system, used in some modem ships, sea water is supplied to cool （）which will circulate to other individual cooler, greatly reducing the corrosion problems.Amain bearingsBsea waterCcooling oilDlower temperature fresh water
单选题The component in an inert gas system used for cleaning the gas of solid and sulphur combustion products，while simultaneously cooling the inert gas，is called the（）.AfilterBcoolerCscrubberDpurifier
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