A. Quartz
B. Calcite
C. Corundum
D. Fluorite
Related Mcqs:
- The softest material just next to talc in the Mho’s scale is___________________?
A. Quartz
B. Gypsum
C. Feldspar
D. Fluorite - The softest material in Mho’s scale (for measuring hardness) is________________?
A. Talc
B. Gypsum
C. Rubber
D. None of these - The softest material just next to talc in the Mhos scale is_________________?
A. Quartz
B. Gypsum
C. Feldspar
D. Fluorite - Failure of a material is termed as fatigue failure, if it fails below the yield point. The resistance to fatigue failure of a material is measured by the__________________?
A. Ultimate tensile strength (U.T.S.)
B. Endurance limit
C. Elastic limit
D. None of these - Which of the following material of construction may be recommended by a chemical engineer for handling a gaseous chlorine (dry or wet) stream in a fluid flow system ?
A. High silicon iron, silicon rubber, Kel-F and Teflon
B. Mild steel and stainless steel
C. Cast iron, tin and aluminium
D. Copper, nickel and Monel - Which of the following is the most suitable material of construction for evaporator & its tubes for concentrating NaOH solution to 70% ?
A. Cast iron
B. Steel
C. Nickel
D. Karbate - Which of the following is the hardest material ?
A. Topaz
B. Quartz
C. Corundum
D. Fluorite - 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 the most elastic material ?
A. Plastic
B. Glass
C. Steel
D. Rubber - Which of the following would not be a suitable material of construction for handling aqueous hydrofluoric acid (HF) at 100°C ?
A. Monel
B. Stainless steel
C. Graphite
D. Kel-F and Teflon
