单选题What will NOT increase friction of a liquid flowing in a pipe and cause a loss of suction head?（）.ABends in the pipingBSlowing the pumping rateCPipeline valvesDBacking rings for pipe welds
单选题
What will NOT increase friction of a liquid flowing in a pipe and cause a loss of suction head?（）.
A
Bends in the piping
B
Slowing the pumping rate
C
Pipeline valves
D
Backing rings for pipe welds
参考解析
解析：
暂无解析
相关考题：
What is the function of the after-coolers installed in the diesel engine air intake system?A.Decrease the air densityB.Increase the exhaust temperatureC.Decrease the lube oil temperatureD.Increase the air density
When referring to dry bulk cargoes，the term "flow state" ______.A.designates the state of a commodity when the ship is heeled past the angle of reposeB.relates to the suitability of loading a cargo by flowing down inclined chutesC.refers to the saturation of a dry bulk product with water to the point where it acts as a liquidD.relates to the minimum granule size of a particular product where it will flow like a liquid at an angle of 30°
Movement of liquid in a tank when a vessel inclines causes an increase in ______．A.Righting armB.Metacentric heightC.Height of the uncorrected KGD.Natural rolling period
What is a wet cargo ________．A.A liquid cargo carried in the deep tanksB.A canned or bottled liquid such as beerC.A cargo that contains hygroscopic moistureD.A cargo particularly susceptible to damage by moisture
What is classified as a combustible liquid ________．A.AcetaldehydeB.Ethyl alcoholC.Carbon tetrachlorideD.Tetramethylene glycol
What best describes benzene ________．A.Clear colorless liquid with an acrid odorB.Clear colorless liquid with an aromatic odorC.Brownish liquid，odorlessD.Brownish liquid，with an acrid odor
What type of stern tube bearing has the least friction ________．A.Oil-lubricated bearingsB.Lignum vitaeC.Hard rubberD.Bronze bushings
What are two benefits for prospects, derived from the Cisco SBR Methodology?（）A、Creates a Link between Business and IT PlanningB、Increase Customer RoyaltyC、Lowers TCOD、Increase Profitability
What are three valid reasons to assign ports to VLANs on a switch? （）A、to make VTP easier to implementB、to isolate broadcast trafficC、to increase the size of the collision domainD、to allow more devices to connect to the networkE、to logically group hosts according to functionF、to increase network security
A network administrator is viewing the control plane traffic flowing through their network in real-time. What built-in feature enabled this ability?（）A、call homeB、wiresharkC、ethanalyzerD、NX-OS
单选题While flowing through the volute in a centrifugal pump, part of the （） energy of the liquid is converted to （） energy.Akinetic；pressureBkinetic；essentialCpressure；kineticDpressure；height
单选题What is the purpose of sub cooling R-12 in the condenser?（）Ato increase the system efficiency by sensible heat transferBto stop the liquid from flashingCto reduce the load on the compressorDto remove latent heat of vaporization and the suction piping transfer
单选题What occurs in the combustion space of a diesel engine cylinder shortly after ignition and before the piston reaches TDC?（）ARapid increase in temperature with constant pressureBRapid increase in pressure with constant temperatureCRapid increase in pressure and temperatureDRapid increase in volume and decrease in pressure
单选题The percent increase in the number of students enrolled in advanced mathematics courses from 1993 to 1994 exceeded the percent increase from 1995 to 1996 by approximately what percent?A200B133C75D67E8
单选题A(n) （） is a device which adds to the energy of a liquid or gas causing an increase in its pressure and a movement of the fluid.ApumpBengineCturbineDboiler
单选题The liquid flowing in the capillary is such that the difference in （） readings taken before the capillary and after it is related to the oil viscosity.ApressureBvelocityCflow rateDtemperature
单选题The basic function of the centrifugal pump impeller is to （）.Adirectly increase the pressure of the liquid being pumpedBdirectly increase the velocity of the liquid being pumpedCconvert the potential energy of the liquid to kinetic energyDseparate air from the liquid being pumped
单选题What is the substance called which can readily be converted from a liquid into a vapor, and also from a vapor into liquid with a reasonably narrow range of pressure?（）ARefrigeratorBRefrigerantCCooling mediumDBrine
单选题While troubleshooting a refrigeration system for low head pressure, liquid refrigerant flooding back from the evaporator is determined to be the causeIt may be necessary to （）.Achange the expansion valve adjustmentBreadjust the water regulating valve to increase the flow of waterCpurge air from the condenserDclean the waterside of the condenser
单选题What is the principal danger from the liquid in a half full tank onboard a vessel?（）ACorrosion from the shifting liquidBRupturing of bulkheads from the shifting liquidCLoss of stability from free surface effectDHoling of the tank bottom from the weight of the shifting liquid
单选题What type of liquid is used in the liquid P/V breaker（）.AHydraulic oilBWater-antifreeze mixtureCDistilled waterDOil from the cargo
单选题The pipe friction and the resistance will （） as a result of an increase in the amount of fluid flowing through the system.AreduceBriseCraiseDfall
单选题The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.Aspecific gravityBviscosityCS E numberDhydrolytic stability
单选题What is the purpose of a relief valve?（）Ato fill 2 tanks at the same timeBto use pump at a higher pressureCto return liquid to suction side if discharge valve is closedDAll of the above are true
单选题What is the principle behind dynamic braking as used on an anchor windlass?（）AElectrical loadingBMechanical distributionCCompressibility of airDMechanical friction
单选题When referring to dry bulk cargoes，the term “flow state”（）.Adesignates the state of a commodity when the ship is heeled past the angle of reposeBrelates to the suitability of loading a cargo by flowing down inclined chutesCrefers to the saturation of a dry bulk product with water to the point where it acts as a liquidDrelates to the minimum granule size of a particular product where it will flow like a liquid at an angle of 30°
单选题What type of stern tube bearing has the least friction（）.AOil-lubricated bearingsBLignum vitaeCHard rubberDBronze bushings