网友您好, 请在下方输入框内输入要搜索的题目:
题目内容
(请给出正确答案)
根据流动管道内所处的流动状态具有不同的摩擦阻力系数。There are different friction resistance coefficients according to the flow state in the flow pipe.
参考答案和解析
A
更多 “根据流动管道内所处的流动状态具有不同的摩擦阻力系数。There are different friction resistance coefficients according to the flow state in the flow pipe.” 相关考题
考题
管道内流动的介质性质不同对管道的作用力也不同,下面 ( )不可能是引起管道振动的振源。A、管道内介质流动的流体不稳定;B、管道内介质为汽液两相流;C、管道中流动的介质向外界散热;D、管道阀门缓慢关闭或打开
考题
If you install a new hydraulic hose in a hydraulic system, the hose must be long enough to allow for contraction to preventA.failure of the hydraulic hoseB.excessive flow through the lineC.friction in other areas of the hydraulic systemD.overheating of the hydraulic fluid
考题
What Netflow component can be applied to an interface to track IPv4 traffic?()
A.flow monitorB.flow recordC.flow samplerD.flow
考题
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°
考题
与GPRS移动终端有对应关系的标识:()A、Temporary Flow IdentityB、Uplink State FlagC、Temporary Logical Link Identity(TLLI)D、Skip Indicator
考题
以下哪个标识不是出现在GPRS无线部分的信令流程内()A、Temporary Flow Identity (TFI)B、Uplink State Flag (USF)C、Temporary Logical Link Identity (TLLI)D、Tunnel Identifier (TID)
考题
What Netflow component can be applied to an interface to track IPv4 traffic?()A、flow monitorB、flow recordC、flow samplerD、flow
考题
What are the four vPath packet flow steps? ()A、 perform flow lookupsB、 intercept packets on service enabled portsC、 run packets through the vPath flow managerD、 classify the packetsE、 flow manager emits an action for the packetsF、 enforce the action determined by the flow manager
考题
单选题According to the passage, scientists can’t observe some of the earliest steps in brain activity becausee.A
those changes are subtle and masked by some reactionsB
subtle changes in blood flow began earlierC
the imaging techniques are out of placeD
the flow of blood to increase to an area of the brain is slow
考题
单选题Pressure in an operating hydraulic system is developed ().A
only by the pump as its primary functionB
by resistance to the fluid flow through the systemC
by the thermal input to the systems fluidD
solely by the charge applied by the accumulators
考题
单选题An ammeter should be used to measure ()A
the voltage between two points in a circuitB
circuit continuityC
current flow in a circuitD
total or partial circuit resistance
考题
单选题If the resistance of a circuit is cut in half and the applied voltage is kept constant, the current flow will be ().A
doubledB
quadrupledC
unchangedD
cut in half
考题
单选题The main function of piston compression rings is to ()A
prevent excessive cylinder liner wearB
reduce friction losses in the engineC
seal the space between the piston and the linerD
limit upward flow of lube oil into the combustion space
考题
单选题With respect to diesel fuel, the ease with which a cold engine will start is dependent upon the()A
ignition quality of the fuelB
high heating value of the fuelC
amount of carbon residue after combustionD
internal flow resistance in the injectors
考题
单选题Which of the following statements is true concerning simple parallel resistance circuits?()A
The total current flow equals the sum of the individual currentsB
The total current flow equals the reciprocal of the sum of the individual currentsC
The total resistance equals the sum of the individual resistanceD
The total voltage equals the sum of the individual voltages across each resistance
考题
单选题管道内流动的介质性质不同对管道的作力也不同,下面()不可能是引起管道振动的振源。A
管道内介质流动的流体不稳定B
管道内介质为汽液两相流C
管道中流动的介质向外界散热D
管道阀门缓慢关闭或打开
考题
单选题When the voltage remains constant and the resistance is increased in a series circuit, the flow of current ()A
increases by the square of the original valueB
increasesC
remains the sameD
decreases
考题
单选题According to the passage, why couldn’t PET and functional M. R. I. scans detect subtle changes in blood flow earlier?A
Because there is early oxygen transfer.B
Because they do not form their images quickly enough to follow such rapid changes.C
Because researchers control the changes in blood flow.D
Because early oxygen transfer gives the flow blood energy.
考题
单选题Which of the following statements concerning a simple parallel resistance circuit is correct?()A
The voltage drop across each resistor is the sameB
The total current flow equals the reciprocal of the sum of the individual currentsC
The total resistance equals the sum of the individual resistancesD
The total voltage equals the sum of the individual voltages across each resistance
考题
单选题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°
考题
单选题In the piping systems of a vessel,what type of valve gives the least resistance to fluid flow when fully open?().A
Globe valveB
Butterfly valveC
Gate valveD
Packless valve
热门标签
最新试卷