Chemical Engineering Basics

A. Removed by acid pickling
B. Hammered into the surface
C. Removed with coarse emery cloth
D. Left as such to protect the surface

A. Lead
B. Copper
C. Aluminium
D. Wrought iron

A. Copper-lead alloys
B. Babbitts
C. Bronzes
D. Cermets

A. Plasticiser: increases the polymer strength
B. Heat stabiliser: increases the maximum service temperature
C. Fillers: Does not affect the property of polymer but increases its weight
D. Lubricants: increases the flexibility of polymers

A. Close the surface porosity
B. Break the continuity of columnar grains
C. Flatten the weldment
D. Introduce texture in the weld

A. Powder
B. Gaseous mixture
C. Solution
D. Emulsion

A. Classification
B. Smelting
C. Roasting
D. None of these