Related Questions

The forms in which various metals and non metals occur in nature are called minerals. Which of the following is not a metallic ferrous mineral?
A Cassiterite
B Sphalerite
C Chalcopyrite
D Calcite
Joining of thin foils is preferred to be done by
A Gamma rays
B X-rays
C Microwaves
D Gas welding
What type of fusion welding process is used for welding sheet metals of all engineering metals (except Cu, Ag) in automobile and air craft industries, pipe and tubing production?
A Thermit welding
B Electroslag welding
C Resistance welding
D Submerged arc Welding
Which of the following metals occurs in nature in their free metallic state?
A Au & Ag
B Pb & Zn
C Cu & Ni
D None of these
A crescendo of metallic thuds arose from the market, where the iron-smiths were . . . . . . . . the pieces of metals.
A hammering
B flattening
C thrashing
D striking
A crescendo of metallic thuds arose from the market, where the iron-smiths were ...... the pieces of metals.
A flattening
B striking
C hammering
D thrashing
There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant?
A Mercury
B Arsenic
C Aluminium
D Lead
Which of the following metals forms an amalgam with other metals?
A Tin
B Mercury
C Lead
D Zinc
Which of the following metals form an amalgam with other metals ?
A Lead
B Tin
C Zinc
D Mercury
An important geometrical quantity in the cutting of metals which can be used as a criterion for machinability of metals is
A Cutting speed
B Feed rate
C Shear angle
D Tool geometry

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