Q.1
Which of the following is not a natural abrasive?
  • a) Emery
  • b) Quartz
  • c) Silicon carbide
  • d) Sandstone
Q.2
What is a common application of diamond?
  • a) Drilling of rocks
  • b) Sandpaper
  • c) Wood finishing
  • d) Polishing of metals
Q.3
Sandpaper is a common application of ______ abrasives.
  • a) Garnet and flint
  • b) Rottenstone and pumica
  • c) Walnut shells
  • d) Silicon carbide
Q.4
Silicic acid deposits are used to form _____
  • a) Quartz
  • b) Emery
  • c) Tripoli
  • d) Diamond
Q.5
A high-temperature electric arc of _____ is used for the manufacture of silicon carbide.
  • a) 1500oF
  • b) 3000oF
  • c) 4500oF
  • d) 7500oF
Q.6
Which abrasive has a common trade name as carborundum?
  • a) Aluminum oxide
  • b) Silicon carbide
  • c) Tungsten carbide
  • d) Boron carbide
Q.7
Which of the following is regarded as a modern abrasive?
  • a) Tripoli
  • b) Silicon carbide
  • c) Pumica
  • d) Boron carbide
Q.8
The polishing of cast iron and finishing of stainless steels are applications of ______
  • a) Silicon carbide
  • b) Boron carbide
  • c) Tungsten carbide
  • d) Aluminum oxide
Q.9
Which silicate structure does the following diagram represent?
Questionengineering-materials-metallurgy-questions-answers9.jpg
  • a) Tetrahedron
  • b) Poly-tetrahedral
  • c) Chain
  • d) Sheet
Q.10
What is the composition of a double tetrahedral structure?
  • a) SiO4
  • b) Si2O7
  • c) Si3O9
  • d) Si5O9
Q.11
Conversion of a tetrahedral unit into a three-dimensional structure gives a ______ structure.
Questionengineering-materials-metallurgy-questions-answers11.jpg
  • a) Vitreous
  • b) Sheet
  • c) Chain
  • d) Framework
Q.12
Quartz and Feldspar are examples having ______ structure
  • a) Tetrahedron
  • b) Sheet
  • c) Poly tetrahedral
  • d) Framework
Q.13
The ability of a material to exist in more than one crystal structure is known as _______
Questionengineering-materials-metallurgy-questions-answers14.jpg
  • a) Polymorphism
  • b) Allotropy
  • c) Polyhedral phase
  • d) Lattice
Q.14
Which silicate structure does the following figure represent?
  • a) Chain
  • b) Sheet
  • c) Vitreous
  • d) Tetrahedron
0 h : 0 m : 1 s