Related Questions

Closeness of packing is maximum in case of __________ crystal lattice.
A Face centred
B Simple cubic
C Body centred
D None of these
Deformation band is absent in materials having __________ lattice crystal structure.
A Fcc
B Bcc
C Hcp
D None of these
In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed __________ of the column diameter.
A $${\frac{1}{5}^{{\text{th}}}}$$
B $${\frac{1}{{15}}^{{\text{th}}}}$$
C $${\frac{1}{{30}}^{{\text{th}}}}$$
D $${\frac{1}{{50}}^{{\text{th}}}}$$
In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing.
A Greater than
B Smaller than
C Equal to
D Either A, or B ; depends on the type of packing
Stacked packing compared to dumped packing
A Provides poorer contact between the fluids
B Gives lower pressure drop
C Both A & B
D Gives higher pressure drop
There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.
A One
B Two
C Three
D None of these
The size of the tetrahedral void in the closest packing of atoms is __________ that of the octahedral void.
A Equal to
B Greater than
C Less than
D Either A, B or C; depends on the size of atom
The defect which takes place due to imperfect packing of atoms during crystallization is known as
A Line defect
B Surface defect
C Point defect
D None of these
How many atoms are there per unit cell in a body centred cubic lattice system?
A 2
B 3
C 4
D 6
Materials having __________ lattice structure are usually the most ductile.
A Body centred cubic (bcc)
B Hexagonal close packed (hcp)
C Face centred cubic (fcc)
D None of these

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