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)

湿周:在总流过流断面上,液体与固体相接触的线称为湿周。Wet circumference: on the cross section of the total flow, the line between liquid and solid is called wet circumference.


参考答案和解析
错误
更多 “湿周:在总流过流断面上,液体与固体相接触的线称为湿周。Wet circumference: on the cross section of the total flow, the line between liquid and solid is called wet circumference.” 相关考题
考题 在喷枪选项中可以设定的内容是()A. Pressure(压力)B. Auto Erase(自动抹除)C. Wet Edges(湿边)D. Styles(样式)

考题 wet bulb temperature

考题 wet granulation

考题 As the amount of moisture in the air increases, the difference between the dry bulb and wet bulb temperatures will ______.A.increaseB.decreaseC.remain unchangedD.be greatest at dew point

考题 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

考题 流体流动时,流体整个周界都不和固体周界接触,而是被四周的气体或液体所包围,这种流动称为( )。A.有压流 B.无压流 C.稳定流 D.射流

考题 液流中与所有流线相垂直的截面称为()。A、过流断面B、湿周C、水力半径D、液压面

考题 过流断面上流体与周围固体壁接触线的周长叫做()A、湿周B、水力半径C、过流断面周长D、水力周长

考题 与流束或总流的速度相垂直的断面称为有效断面,在有效断面上与固体边界接触的周长称为湿周,有效断面与湿周之比称为水力半径。

考题 画笔工具的用法和喷枪工具的用法基本相同,唯一不同的是Wet Edges(湿边)。

考题 The ()(干货船 )can’t carry wet cargo.A、liquid cargo shipB、drummed cargoC、dry cargo shipD、barge

考题 接触起电可发生在()。A、固体-固体、液体-液体的分界面上B、固体-液体的分界面上C、以上全部

考题 流体流动时,流体整个周界都不和固体周界接触,而是被四周的气体或液体所包围,这种流动称为()。A、有压流B、元压流C、稳定流D、射流

考题 湿井wet-well

考题 下列对卸下的电池的运输方法正确的是()A、包装必须防漏,并且不受电解液的影响,必须将其固定在货仓内或集装板上,以防止倾倒B、电池必须防其短路,保证电池在包装内稳固向上,在电池周围填充能吸收全部电解液的且与之相容的吸附材料C、包装必须标有“BATTERY、WET、WITHWHEELCHAIR(轮椅用湿电池)”或“BATTERY、WET、WITH、OBILITYAID(代步工具用湿电池)”并粘贴“腐蚀性标签”和“方向标签”D、必须通知机长其装机位臵

考题 低油面传感器(LOW LEVEL)在何种状态下会发出低油面信号?()A、干时DRYB、湿时WET

考题 过流断面上流体和固体壁面相接触的周界称为()。A、过流断面B、湿周C、水力半径D、当量直径

考题 单选题As the amount of moisture in the air increases, the difference between the dry bulb and wet bulb temperature will ().A increaseB decreaseC remain unchangedD be greatest at dew point

考题 单选题One advantage of dry cylinder liners used in a diesel engine is the()A lower thermal expansion rates than wet linersB greater heat transfer rate than wet linersC greater wear resistance than wet linersD procedure to replace dry liners is simpler than for wet liners

考题 单选题When liquid reaches the compressor of a refrigeration system through the suction line, the condition is called ().A flooding backB superheatingC overflowingD recycling

考题 单选题The dew point temperature is().A always higher than the air temperatureB always lower than the air temperatureC equal to the difference between the wet and dry bulb temperaturesD the temperature at which the air is saturated with water vapor

考题 单选题Before liquid can flow into a pump, the air in the suction line must be () sufficiently to cause the liquid to flow into the suction chamber.A filledB evacuatedC compressedD charged

考题 问答题Most people would describe water like a colorless liquid. They         (1) _______would know that in very cold conditions it becomes a solid calledice and that when heating on a fire it becomes a vapor called steam.       (2) _______However, water, they would say, is a liquid. We have learned thatwater consists of molecules composed with two atoms of hydrogen          (3) _______and one atom of oxygen, which we describe by the formula H2O.This is equally true of the solid called ice and the gas called steam.Chemically there is no difference between the gas, the liquid, andthe solid, all of which is made up of molecules with the formula H2O.       (4) _______This is true of other chemical substances; most of them can exist asgases or as liquids or as solids. We may normally think of iron as asolid, but if we will heat it in a furnace, it will melt and become a       (5) _______liquid, and at very high temperatures it will become a gas. Nothingvery permanent occurs when a gas changes into a liquid or a solid.Everyone knows that ice, which has been made by freezing water,can be melted again by warmed and that steam can be condensed           (6) _______on a cold surface to become liquid water. In fact, it is only becausewater is so a familiar substance that different names are used for        (7) _______the solid, liquid and gas. Most substances are only familiar with         (8) _______us in one state, because the temperatures requiring to turn them         (9) _______into gases are very high, or the temperatures necessary to turn theminto solids are so low. Water is an exception in this respect, whichis another reason why its three states have given three different        (10) _______names.

考题 单选题接触起电可发生在()。A 固体-固体、液体-液体的分界面上B 固体-液体的分界面上C 以上全部

考题 名词解释题混合液悬浮固体浓度(Mixed Liquid Suspended Solid,简称MLSS)

考题 判断题画笔工具的用法和喷枪工具的用法基本相同,唯一不同的是Wet Edges(湿边)。A 对B 错

考题 单选题The static suction head of is the ()A distance of the suction liquid level above the line of the pumpB distance the suction liquid level is below the center line of the pumpC force necessary to overcome frictional losses in the pump and pipingD amount in inches of mercury the total suction head is below atmospheric pressure

考题 单选题A fire starting by spontaneous combustion can be expected in which condition?().A Paints, varnish, or other liquid flammables are stowed in a dry stores lockerB Inert cargoes such as pig iron are loaded in a wet conditionC Oily rags are stowed in a metal pailD Clean mattresses are stored in contact with an electric light bulb