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乐山师范学院专业英语 A卷
In a piston pump, liquid is drawn through an inlet check valve into the cylinder by the withdrawal of a piston and then is forced out through a discharge check valve on the return stroke.
Filtration is the removal of solid particles from a fluid by passing the fluid through a filtering medium, or septum, on which the solids are deposited.[1] Industrial.
Acid-base indicators (also known as pH indicators) are substances which change color with pH
It is an introductory text, written for undergraduate students in their junior or senior years who have completed the usual courses in mathematics, physics, chemistry, and an introduction to chemical engineering. An elementary knowledge of material and heat balances and of thermodynamic principles is assumed.
更多情况下,进料(悬浮液)需要进行预处理,以便加快过滤速度。预处理方式包括加热、重结晶或是加入过滤助剂如纤维素或硅藻土。
当两个温度不同的物体接触时,热量将从高温物体流向低温物体。热量流动的净结果永远是向低温方向进行。热量传递的机理有三种:热传导、热对流和热辐射。
化学工程师必须开发、设计和工程化整个工艺和所需的设备,选择适当的原材料,高效、安全和经济性地运作工厂,并确保产品满足客户的要求。
句子翻译(汉译英)
在滴定中,与被测物质发生完全反应的试剂通常称为滴定剂,滴定分析就是定量测定出所消耗滴定剂的体积
In metals, thermal conduction results from the motion of free electrons, and there is close correspondence between thermal conductivity and electrical conductivity. In solids that are poor conductors of electricity and in most liquids, thermal conduction results from momentum transfer between adjacent vibrating molecules or atoms. In gases, conduction occurs by the random motion of molecules, so that heat is “diffused” from hotter regions to colder ones.
The behavior of fluids is important to process engineering generally and constitutes one of the foundations for the study of unit operation. An understanding of fluids is essential, not only for accurately treating problems in the movement of fluids through pipes, pumps, and all kinds of process equipments but also for the study of heat flow and many separations that depend on diffusion and mass transfer.
At given temperature and pressure, a fluid possesses a definite density, which in engineering practice is usually measured in kilograms per cubic meter. Although the density of all fluids depends on the temperature and pressure, the variation in density with changes in these variables may be small or large. If the density changes only slightly with moderate changes in temperature and pressure, the fluid is said to be incompressible; if the changes in density are significant, the fluid is said to be compressible. Liquids are generally considered to be incompressible and gases compressible. The terms are relative, however, and the density of a liquid can change appreciably if pressure and temperature are changed over wide limits. Also, gases subjected to small percentage changes in pressure and temperature act as incompressible fluids and density changes under such conditions may be neglected without serious error.
An economical method of organizing much of the subject matter of chemical engineering is based on two facts: ①although the number of individual processes is great, each one can be broken down into a series of steps, called operations, each of which in turns appears in process after process; ②the individual operations have common techniques and are based on the same scientific principles.
Filtration is the removal of solid particles from a fluid by passing the fluid through a filtering medium, or septum, on which the solids are deposited.[1] Industrial.
Acid-base indicators (also known as pH indicators) are substances which change color with pH
It is an introductory text, written for undergraduate students in their junior or senior years who have completed the usual courses in mathematics, physics, chemistry, and an introduction to chemical engineering. An elementary knowledge of material and heat balances and of thermodynamic principles is assumed.
更多情况下,进料(悬浮液)需要进行预处理,以便加快过滤速度。预处理方式包括加热、重结晶或是加入过滤助剂如纤维素或硅藻土。
当两个温度不同的物体接触时,热量将从高温物体流向低温物体。热量流动的净结果永远是向低温方向进行。热量传递的机理有三种:热传导、热对流和热辐射。
化学工程师必须开发、设计和工程化整个工艺和所需的设备,选择适当的原材料,高效、安全和经济性地运作工厂,并确保产品满足客户的要求。
句子翻译(汉译英)
在滴定中,与被测物质发生完全反应的试剂通常称为滴定剂,滴定分析就是定量测定出所消耗滴定剂的体积
In metals, thermal conduction results from the motion of free electrons, and there is close correspondence between thermal conductivity and electrical conductivity. In solids that are poor conductors of electricity and in most liquids, thermal conduction results from momentum transfer between adjacent vibrating molecules or atoms. In gases, conduction occurs by the random motion of molecules, so that heat is “diffused” from hotter regions to colder ones.
The behavior of fluids is important to process engineering generally and constitutes one of the foundations for the study of unit operation. An understanding of fluids is essential, not only for accurately treating problems in the movement of fluids through pipes, pumps, and all kinds of process equipments but also for the study of heat flow and many separations that depend on diffusion and mass transfer.
At given temperature and pressure, a fluid possesses a definite density, which in engineering practice is usually measured in kilograms per cubic meter. Although the density of all fluids depends on the temperature and pressure, the variation in density with changes in these variables may be small or large. If the density changes only slightly with moderate changes in temperature and pressure, the fluid is said to be incompressible; if the changes in density are significant, the fluid is said to be compressible. Liquids are generally considered to be incompressible and gases compressible. The terms are relative, however, and the density of a liquid can change appreciably if pressure and temperature are changed over wide limits. Also, gases subjected to small percentage changes in pressure and temperature act as incompressible fluids and density changes under such conditions may be neglected without serious error.
An economical method of organizing much of the subject matter of chemical engineering is based on two facts: ①although the number of individual processes is great, each one can be broken down into a series of steps, called operations, each of which in turns appears in process after process; ②the individual operations have common techniques and are based on the same scientific principles.