Case hardening is not done by________________?
Case hardening is not done by________________?
A. Nitriding
B. Hot dipg
C. Electroplating
D. Both ‘B’ & ‘C’
Chemical Engineering Basics
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Oxide layer formed on the non-ferrous metal surface after its annealing is__________________?
Oxide layer formed on the non-ferrous metal surface after its annealing is__________________?A. Removed by acid pickling
B. Hammered into the surface
C. Removed with coarse emery cloth
D. Left as such to protect the surface -
The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability ?
The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability ?A. Lead
B. Copper
C. Aluminium
D. Wrought iron -
Which of the following is not used as a bearing material ?
Which of the following is not used as a bearing material ?A. Copper-lead alloys
B. Babbitts
C. Bronzes
D. Cermets -
Pick out the correct combination about the role of various additives used in polymers ?
Pick out the correct combination about the role of various additives used in polymers ?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 -
In multipass welds, shot peening is done after each pass to__________________?
In multipass welds, shot peening is done after each pass to__________________?A. Close the surface porosity
B. Break the continuity of columnar grains
C. Flatten the weldment
D. Introduce texture in the weld -
Shampoos are commercially not available in the form of ___________________?
Shampoos are commercially not available in the form of ___________________?A. Powder
B. Gaseous mixture
C. Solution
D. Emulsion -
Which of the following is an ore dressing operation ?
Which of the following is an ore dressing operation ?A. Classification
B. Smelting
C. Roasting
D. None of these