Quiz for Packing

Q1: What is the packing efficiency in a simple cubic lattice?

A. 52.4% B. 68% C. 74% D. 90%

Q2: In FCC lattice, each unit cell has how many atoms?

A. 1 B. 2 C. 4 D. 6

Q3: Packing efficiency of hexagonal close packing is approximately:

A. 52% B. 60.4% C. 68% D. 74%

Q4: Coordination number in CCP structure is:

A. 4 B. 6 C. 8 D. 12

Q5: Which type of packing is found in metals?

A. Loose packing B. HCP or CCP C. Simple cubic D. Tetragonal packing

Q6: Which unit cell shows maximum packing efficiency?

A. Simple Cubic B. BCC C. FCC D. Tetragonal

Q7: Void space in simple cubic structure is about:

A. 26% B. 32% C. 48% D. 47.6%

Q8: What is the coordination number in BCC?

A. 4 B. 6 C. 8 D. 12

Q9: Number of atoms per unit cell in BCC?

A. 1 B. 2 C. 3 D. 4

Q10: Which of these has the least packing efficiency?

A. BCC B. FCC C. HCP D. Simple cubic

Q11: FCC and HCP differ in:

A. Coordination number B. Packing efficiency C. Void space D. Layer arrangement

Q12: Which structure is also known as cubic close packing?

A. BCC B. FCC C. HCP D. Simple cubic

Q13: In hexagonal close packing, the third layer is placed:

A. Directly above first B. Shifted C. Random D. Opposite to first

Q14: Which lattice type is found in NaCl?

A. Simple cubic B. BCC C. FCC D. Tetragonal

Q15: Which is not a close-packed structure?

A. FCC B. BCC C. HCP D. CCP

Q16: Unit cell with atoms at corners and centers of faces is:

A. BCC B. FCC C. Simple Cubic D. Tetragonal

Q17: Atoms per unit cell in FCC structure:

A. 1 B. 2 C. 3 D. 4

Q18: What is the coordination number in HCP?

A. 6 B. 8 C. 12 D. 4

Q19: Packing efficiency in body centered cubic is:

A. 68% B. 52.4% C. 60% D. 74%

Q20: Which is true about BCC structure?

A. Low density B. Atoms at face centers C. Coordination number 8 D. Packing efficiency 74%