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Engineering-materials Questions Set 25:

Quiz Mode

What is the crystal structure of graphite, a common allotrope of carbon?

Cubic

Monoclinic

Orthorhombic

Hexagonal

Solution:

The edge length of an FCC (face-centered cubic) lattice is X times the atomic radius. The value of X is:

4/√3

3/√2

√2

Solution:

Which of the following Bravais lattices exist as face-centered unit cells?

Orthorhombic

Monoclinic

Tetragonal

None of the mentioned

Solution:

Which of the following is not a property of thermoplastic materials?

Soft and weak

Easy to mold

Usable at high temperature

Recyclable

Solution:

The property by which a material can absorb energy without permanent deformation is called

Toughness

Resilience

Impact strength

Ductility

Solution:

An iron-carbon binary alloy with 0.5% carbon by weight is called?

Eutectoid alloy

Hypereutectoid alloy

Eutectic alloy

Hypoeutectoid alloy

Solution:

Which of the following unit cells do not exist for tetragonal lattices?

Primitive centered unit cell

All of the mentioned exist

Body-centered unit cell

Face-centered unit cell

Solution:

Normalizing treatment for steel involves

soaking below critical temperature & cooling in air

soaking above critical temperature & cooling in furnace

soaking above the critical temperature & cooling in air

soaking above critical temperature & quenching in oil

Solution:

Which of the following statements about notches is false?

Notch is a sudden change in section of a material

Stress concentration is produced due to notches

Notches change the stress applied to the body

Smaller the tip of the notch, less the increase in stress

Solution:

Which of the following statements about dislocations in metallic crystals are true?

In screw dislocation, the dislocation can glide but not climb.

Tensile, compressive, and shear stress fields are present in edge dislocation.

In mixed dislocation, the line direction and Burgers vectors are neither perpendicular nor parallel.

Tensile, compressive, and shear stress fields are not present in edge dislocation.

Engineering-materials Questions Set 25:

What is the crystal structure of graphite, a common allotrope of carbon?

Solution:

The edge length of an FCC (face-centered cubic) lattice is X times the atomic radius. The value of X is:

Solution:

Which of the following Bravais lattices exist as face-centered unit cells?

Solution:

Which of the following is not a property of thermoplastic materials?

Solution:

The property by which a material can absorb energy without permanent deformation is called

Solution:

An iron-carbon binary alloy with 0.5% carbon by weight is called?

Solution:

Which of the following unit cells do not exist for tetragonal lattices?

Solution:

Normalizing treatment for steel involves

Solution:

Which of the following statements about notches is false?

Solution:

Which of the following statements about dislocations in metallic crystals are true?

Solution:

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