Preamble
The material balance shows the weights and analysis of input and output materials and the calculated inputs and outputs of each of the important elements and compounds. This accounting serves as a check on plant data in that the various totals of inputs and output should be equal.
This lecture discusses the different ways of expression of measured quantities. It is felt that many a times the students have problems in unit and dimensions and to converting one unit to another.
Standard units of measurement
The adoption of standards has varied greatly as regards unit in different parts of the world. The following table lists some of the commonly used set of fundamental units from which all other units can be derived
Quantity |
Absolute units
FPS CGS MKS SI
|
|
Mass |
Pound gram kg kg
|
Slug |
Length |
ft cm m m |
ft |
Time |
Sec Sec Sec s |
sec |
Amount of substance |
Lb.mole g.mole kgmole mole |
Lb. mole |
Temperature |
oF oC oK(ork) K |
oF |
|
FPS stands for feet, pound and second. It is british system
CGS stands for centimeter, gram and second
MKS stands for meter, kilogram and second
SI stands for international system of units. Extension of MKS system
|
