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?
- 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.
- 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.
Which silicate structure does the following figure represent?
- a) Chain
- b) Sheet
- c) Vitreous
- d) Tetrahedron
Q.14.
The ability of a material to exist in more than one crystal structure is known as _______
- a) Polymorphism
- b) Allotropy
- c) Polyhedral phase
- d) Lattice