chemical engineering

Which of the following is not included in the selection of a drying system?

• Choosing the appropriate mixer

• Drying tests on prototype or laboratory scales

• Investigation of the appropriate dryer

Laminar flow is defined as…

• that type of flow in which each fluid particle has a definite path and paths of individual particles do not cross each other.

• that type of flow in which each fluid particle does not have a definite path and the paths of individual particles cross each other.

• that type of flow in which each fluid particle does not have a definite path and the paths of individual particles do not cross each other.

Which of the following is wrong?

• Term one, two or three dimensional flow refers to the number of space coordinated required to describe a flow.

• Two-dimensional flow is the flow in which fluid parameters vary along two directions and the flow is the function of three space coordinates (x and y-axis) and time.

• One dimensional flow is the flow in which vary only in one direction and the flow is a function of only one co-ordinate axis and time.

Which of the following is not one of the features of the orifice plate?

• After passing through the mouth of the orifice, the cross-sectional area narrows, the speed increases again.

• An orifice plate is a device used for measuring flow rate, for reducing pressure or for restricting flow.

• Orifice plate; It is used to measure the fluid flow rate of a pipe that is fluid to create a pressure difference, with cross sectional constraints

Which of the following is the mass flow rate formula?

• density * acceleration * area

• density * velocity * area

• density * velocity * volume

Terminal velocity…

• of a particle is the velocity at which it falls freely through a fluid. The weight of the object is exactly balanced by the upward buoyancy force and drag force.

• of a particle is the velocity at which it falls freely through a solid. The weight of the object is exactly balanced by the upward buoyancy force and drag force.

• of a particle is the velocity at which it falls freely through a fluid. The weight of the object is exactly balanced by the upward buoyancy force and frictional force.

Which of the following is wrong?

• Re <2300 is laminar flow

• 2,300 <Re <4000 is transitional flow

• 2,300 <Re <4000 is turbulent flow

Non-Newtonian Fluids is that ...

• the ratio between deformation rate and shear stress is not linear. In other words, fluids whose viscosity is not constant are non-Newtonian fluids.

• the ratio between deformation rate and shear stress is linear. In other words, fluids whose viscosity is constant are non-Newtonian fluids.

• the ratio between deformation rate and shear stress is not linear. In other words, fluids whose velocity is not constant are non-Newtonian fluids.

Absorption refers to the transfer of ………………………………

• one or more components of a gas mixture to a liquid phase in which the gas phase is soluble.

• only one component of a liquid-liquid mixture to a gas phase in which the liquid phase is soluble.

• one or more components of a gas mixture to a solid phase in which the gas phase is soluble.

The differences between absorbtion and adsorption: Absorbtion is ........................

• Exothermic process and influenced by low temperature whereas adsorption is endothermic process and the temperature has no effect.

• Endothermic process and the temperature has no effect whereas adsorption is exothermic process and influenced by low temperature.

• Endothermic process and the temperature has no effect whereas adsorption is exothermic process and influenced by low temperature and pressure.