Case hardening is not done by________________?
A. Nitriding
B. Hot dipg
C. Electroplating
D. Both ‘B’ & ‘C’
Chemical Engineering Basics
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