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6. Which of following axis system is being satisfied by cubic crystal system?

a = b = c, α = β = γ = 90^o a ≠ b = c, α = β = γ = 90^o a = b ≠ c, α = β = γ = 90^o a = b = c, α ≠ β = ϒ = 90^o

S.No.	Crystal System	Conventional Unit Cell Axis System
Lengths	Angles
1	Cubic	a = b = c	? = ? = ? = 90^o
2	Tetragonal	a = b ? c	? = ? = ? = 90^o
3	Orthorhombic	a ? b ? c	? = ? = ? = 90^o
4	Rhombohedral (Trigonal)	a = b = c	? = ? = ? ? 90^o
5	Hexagonal	a = b ? c	? = ? = 90^o, ? = 120^o
6	Monoclinic	a ? b ? c	? = ? = 90^o ? ?
7	Triclinic	a ? b ? c	? ? ? ? ? ? 90^o

Hint Answer

7. Which of following axis system is being satisfied by orthorhombic crystal system?

a = b = c, α = β = γ = 90^o a ≠ b ≠ c, α = β = γ = 90^o a = b ≠ c, α = β = γ = 90^o a = b = c, α ≠ β = γ = 90^o

Hint Answer

8. Effective number of atoms in a simple cubic (SC) unit cell is equal to _____

4 1 8 2

Hint Answer

9. Which of following factor is not responsible for formation of a non-crystalline structure?

Atomic packing has open structure Primary bonds are absent Formation of 1-dimensional chain molecule Strong secondary bond

Hint Answer

10. If radius of a copper atom is given as 1.27 A^o, its density (in kg/m³) will be?

100.01 86.25 8979 7968

Crystal Structure	Effective Number of Atoms per Unit Cell	Effective Number of Atoms per Unit Cell
Simple Cubic (SC)	a = 2r	1
Body Centered Cubic (BCC)	a = 4r/?3	2
Face Centered Cubic (FCC)	a = 4r/?2	4
Hexagonal Close Packed Cubic (HCP)	a = 2r	6

Hint Answer

11. Which of following axis system is being satisfied by hexagonal crystal system?

a = b ≠ c, α = β = 90^o, ϒ = 120^o a ≠ b = c, α = β = ϒ = 90^o a = b ≠ c, α = β = ϒ = 90^o a = b = c, α ≠ β = ϒ = 90^o

Hint Answer

12. Which of following has less crystallinity?

Iron Nickel High density polythene Low density polythene

Hint Answer

13. What is coordination number of a face centered cubic (FCC) unit cell?

4 6 8 12

Hint Answer

14. Which of following axis system is being satisfied by tetragonal crystal system?

a = b = c, α = β = ϒ = 90^o a ≠ b ≠ c, α = β = ϒ = 90^o a = b ≠ c, α = β = ϒ = 90^o a = b = c, α ≠ β = ϒ = 90^o

Hint Answer

15. The atomic packing fraction in a simple cubic unit cell is ____

0.74 0.52 0.68 0.66

Hint Answer

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Crystallography and Defects in Solid

Mechanical Properties and Testing and Phase Diagram

Ferrous Metal, Non-Ferrous Metal and Heat Treatment

Magnetic Properties of Material, Electrical Properties of Materials, Plastics, Ceramics and Composites

Metal Cutting

Cutting-Tool Materials and Cutting Fluids

Lathe Machines, Shaping and Slotting

Milling, Drilling and Reaming

Grinding, Surface Finishing Operations and Unconventional Machining Processes

Metrology, Welding, Fusion-Welding Processes and Unconventional Welding Methods

Powder Metallurgy, NC Part Programming and Metal Casting and Gating Systems

Forming, Metal Forming Processes and Heat Transfer

Jigs and Fixture, Applications and Gears

Topics

This Chapter consists of the following topics

Crystallography and Defects in Solid

Which of following axis system is being satisfied by cubic crystal system?

;

Which of following axis system is being satisfied by orthorhombic crystal system?

;

Effective number of atoms in a simple cubic (SC) unit cell is equal to _____

;

Which of following factor is not responsible for formation of a non-crystalline structure?

;

If radius of a copper atom is given as 1.27 A^o, its density (in kg/m³) will be?

;

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Chapter:

a = b = c, α = β = γ = 90o

a ≠ b ≠ c, α = β = γ = 90o

1

Strong secondary bond

100.01

a = b ≠ c, α = β = 90o, ϒ = 120o

Low density polythene

12

a = b ≠ c, α = β = ϒ = 90o

0.74

All Chapters

Crystallography and Defects in Solid

Mechanical Properties and Testing and Phase Diagram

Ferrous Metal, Non-Ferrous Metal and Heat Treatment

Magnetic Properties of Material, Electrical Properties of Materials, Plastics, Ceramics and Composites

Metal Cutting

Cutting-Tool Materials and Cutting Fluids

Lathe Machines, Shaping and Slotting

Milling, Drilling and Reaming

Grinding, Surface Finishing Operations and Unconventional Machining Processes

Metrology, Welding, Fusion-Welding Processes and Unconventional Welding Methods

Powder Metallurgy, NC Part Programming and Metal Casting and Gating Systems

Forming, Metal Forming Processes and Heat Transfer

Jigs and Fixture, Applications and Gears

Topics

Crystallography and Defects in Solid

Which of following axis system is being satisfied by cubic crystal system?

Which of following axis system is being satisfied by orthorhombic crystal system?

Effective number of atoms in a simple cubic (SC) unit cell is equal to _____

Which of following factor is not responsible for formation of a non-crystalline structure?

If radius of a copper atom is given as 1.27 Ao, its density (in kg/m3) will be?

Which of following axis system is being satisfied by hexagonal crystal system?

Which of following has less crystallinity?

What is coordination number of a face centered cubic (FCC) unit cell?

Which of following axis system is being satisfied by tetragonal crystal system?

The atomic packing fraction in a simple cubic unit cell is ____

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You need to login to ask any Questions from chapter of Manufacturing-engineering-I

a = b = c, α = β = γ = 90^o

a ≠ b ≠ c, α = β = γ = 90^o

a = b ≠ c, α = β = 90^o, ϒ = 120^o

a = b ≠ c, α = β = ϒ = 90^o

If radius of a copper atom is given as 1.27 A^o, its density (in kg/m³) will be?