A. Classification
B. Smelting
C. Roasting
D. None of these
A. Powder
B. Gaseous mixture
C. Solution
D. Emulsion
A. Close the surface porosity
B. Break the continuity of columnar grains
C. Flatten the weldment
D. Introduce texture in the weld
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. Copper-lead alloys
B. Babbitts
C. Bronzes
D. Cermets
A. Lead
B. Copper
C. Aluminium
D. Wrought iron
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. Nitriding
B. Hot dipping
C. Electroplating
D. Both ‘B’ & ‘C’
A. Increase the heat loss
B. Decrease heat loss and will have no effect beyond that
C. Decrease heat flux
D. Reduce convection heat loss compared to conduction heat less
