Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1

Question 1

Match the items in Column I and Column II.
Column I Column II
P. Charpy test 1. Fluidity
Q. Knoop test 2. Micro hardness
R. Spiral test 3. Formability
S. Cupping test 4. Toughness
5. Permeability

Accepted Answer

P- 4, Q - 2, R - 1, S – 3

Answer

P - 4, Q - 5, R - 3, S – 2

Answer

P - 3, Q - 5, R - 1, S - 4

Answer

P - 2, Q - 4, R - 3, S – 5

Question 2

Decreasing grain size in a polycrystalline material

Accepted Answer

Increases yield strength and corrosion resistance.

Answer

Decreases yield strength and corrosion resistance

Answer

Decreases yield strength but increases corrosion resistance

Answer

Increases yield strength but decreases corrosion resistance.

Question 3

A carbon steel having Brinell Hardness number 100 should ultimate tensilestrength closer it

Accepted Answer

350 N/mm2

Answer

100 N/mm2

Answer

200 N/mm2

Answer

1000 N/mm²

Question 4

Which one of the following factors is more relevant to represent completesolubility of two metals in each other?

Accepted Answer

Crystal structure factor

Answer

Chemical affinity

Answer

Valency factor

Answer

Relative size factor

Question 5

Herbert cloudburst Hardness test is conducted to know

Accepted Answer

Uniformity of hardness over a surface

Answer

Softness of non-metallic components

Answer

Hardness of non-metallic components

Answer

Hardness at specified depth inside the surface.

Question 6

Which of the following statement is true about brittle fracture?

Accepted Answer

Many metal with HCP crystal structure commonly show brittle fracture

Answer

High temperature and low strain rates favour brittle fracture

Answer

Brittle fracture is always preceded by noise

Answer

Cup and cone formation is characteristic for brittle materials

Question 7

A measure of Rockwell hardness is the

Accepted Answer

Depth of penetration of indenter

Answer

Surface area of indentation

Answer

Projected area of indentation

Answer

Height of rebound

Question 8

The material property which depends only on the basic crystal structure is

Accepted Answer

Fracture strength

Answer

Fatigue strength

Answer

Work hardening

Answer

Elastic constant

Question 9

Which one of the following pairs of axis lengths (a, b, c) and inter-axial angles (α,β, γ) represents the tetragonal crystal system?

Accepted Answer

a = b ≠ c;α = β = γ = 90⁰

Answer

a = b = c;α = β = γ = 90⁰

Answer

a ≠ b ≠ c;α = β = γ = 90⁰

Answer

a = b = c;α = β = γ ≠ 90⁰

Question 10

Match List-I (Crystal Structure) with List-II (Example) and select the correct answer using the codes given below the Lists:
List-I List-II
(Crystal Structure) (Example)
A. Simple Cubic 1. Zinc
B. Body-centered Cubic 2. Copper
C. Face-centered Cubic 3. Alpha iron at room temperature
D. Hexagonal Close Packed 4. Manganese
Codes: A B C D A B C D
(a) 4 3 1 2 (b) 4 3 2 1
(c) 3 4 2 1 (d) 3 4 1 2

Accepted Answer

(b)

Answer

(a)

Answer

(c)

Answer

(d)

Question 11

What is the planar density of (100) plane in FCC (face-centred cubic) crystal with unit cell side a equal to?

Accepted Answer

Answer

Answer

Answer

Question 12

In Zinc Blende structure, each atom is surrounded by four atoms of the oppositekind which are located at the comers of which one of the following?

Accepted Answer

Tetrahedron

Answer

Hexahedron

Answer

Cube

Answer

Orthorhombic

Question 13

A metal has FCC structure. Suppose its atomic weight and atomic radius is A and r respectively. Let N denotes Avogadro's number. What is the density of the material?

Accepted Answer

Answer

Answer

Answer

Question 14

Consider the following temperature ranges:
1. Room temperature
2. 0 to 910°C
3. 910°C to 1400^oC
4. 1400^oC to below melting pointIn which of the above temperature ranges ferrite with body centered cubic structure isindicated in, the Fe-Fe₃C phase diagram?

Accepted Answer

1, 2 and 4

Answer

2, 3 and 4

Answer

1 and 3

Answer

2 and 3

Question 15

The effective number of lattice points in the unit cell of simple cubic, bodycentered cubic, and face cantered cubic space lattices, respectively, are

Accepted Answer

1, 2, 4

Answer

1, 2, 2

Answer

2, 3, 4

Answer

2, 4, 4

Question 16

The micro structure composition of pearlite for a Fe₃C diagram consists of

Accepted Answer

Carbon dissolved in body-cantered alpha iron and an Fe, Fe3C.

Answer

Carbon dissolved in alpha iron having a body cantered cubic structure.

Answer

Carbon dissolved in gama iron having a face cantered cubic structure.

Answer

A mixture of body-cantered alpha iron and face-entered gamma iron

Question 17

Atomic packing factor (APF) in the case of copper crystal is?

Accepted Answer

0.74

Answer

0.52

Answer

0.68

Answer

1.633

Question 18

Which one of the following is the correct ascending order of packing density forthe given crystal structures of metals?

Accepted Answer

Simple cubic - Body centred cubic - Face centred cubic

Answer

Simple cubic – Face centred cubic – Body centred cubic

Answer

Body centred cubic - Simple cubic - Face centred cubic

Answer

Body centred cubic - Face centred cubic - Simple cubic

Question 19

Assertion (A): Plastic deformation in metals and alloys is a permanentdeformation under load. This property is useful in obtaining products by coldrolling.
Reason (R): Plastic or permanent deformation in metal or alloy is caused bymovement or dislocations.

Accepted Answer

A is true but R is false

Answer

Both A and R are individually true and R is the correct explanation of A

Answer

Both A and R are individually true but R is not the correct explanation of A

Answer

A is false but R is true

Question 20

The B.C.C. and H.C.P. metals undergo plastic deformation by:

Accepted Answer

Twinning in combination with slip

Answer

Slip

Answer

Twinning

Answer

Edge dislocation

GATE Mechanical (ME) Test: Basic Concepts (Structure Of Solids), Hardness

MCQ Practice Test & Solutions: Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 (20 Questions)

Match the items in Column I and Column II.
Column I Column II
P. Charpy test 1. Fluidity
Q. Knoop test 2. Micro hardness
R. Spiral test 3. Formability
S. Cupping test 4. Toughness
5. Permeability

Decreasing grain size in a polycrystalline material

A carbon steel having Brinell Hardness number 100 should ultimate tensilestrength closer it

Which one of the following factors is more relevant to represent completesolubility of two metals in each other?

Herbert cloudburst Hardness test is conducted to know

Which of the following statement is true about brittle fracture?

A measure of Rockwell hardness is the

The material property which depends only on the basic crystal structure is

Which one of the following pairs of axis lengths (a, b, c) and inter-axial angles (α,β, γ) represents the tetragonal crystal system?

What is the planar density of (100) plane in FCC (face-centred cubic) crystal with unit cell side a equal to?

In Zinc Blende structure, each atom is surrounded by four atoms of the oppositekind which are located at the comers of which one of the following?

A metal has FCC structure. Suppose its atomic weight and atomic radius is A and r respectively. Let N denotes Avogadro's number. What is the density of the material?

Consider the following temperature ranges:
1. Room temperature
2. 0 to 910°C
3. 910°C to 1400^oC
4. 1400^oC to below melting pointIn which of the above temperature ranges ferrite with body centered cubic structure isindicated in, the Fe-Fe₃C phase diagram?

The effective number of lattice points in the unit cell of simple cubic, bodycentered cubic, and face cantered cubic space lattices, respectively, are

The micro structure composition of pearlite for a Fe₃C diagram consists of

Atomic packing factor (APF) in the case of copper crystal is?

Which one of the following is the correct ascending order of packing density forthe given crystal structures of metals?

Assertion (A): Plastic deformation in metals and alloys is a permanentdeformation under load. This property is useful in obtaining products by coldrolling.
Reason (R): Plastic or permanent deformation in metal or alloy is caused bymovement or dislocations.

The B.C.C. and H.C.P. metals undergo plastic deformation by:

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GATE Mechanical (ME) Mock Test Series 2027

Top Courses for Mechanical Engineering

About this Mechanical Engineering Practice Test

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GATE Mechanical (ME) Test: Basic Concepts (Structure Of Solids), Hardness

MCQ Practice Test & Solutions: Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 (20 Questions)

Match the items in Column I and Column II. Column I Column II P. Charpy test 1. Fluidity Q. Knoop test 2. Micro hardness R. Spiral test 3. Formability S. Cupping test 4. Toughness 5. Permeability

Decreasing grain size in a polycrystalline material

A carbon steel having Brinell Hardness number 100 should ultimate tensilestrength closer it

Which one of the following factors is more relevant to represent completesolubility of two metals in each other?

Herbert cloudburst Hardness test is conducted to know

Which of the following statement is true about brittle fracture?

A measure of Rockwell hardness is the

The material property which depends only on the basic crystal structure is

Which one of the following pairs of axis lengths (a, b, c) and inter-axial angles (α,β, γ) represents the tetragonal crystal system?

What is the planar density of (100) plane in FCC (face-centred cubic) crystal with unit cell side a equal to?

In Zinc Blende structure, each atom is surrounded by four atoms of the oppositekind which are located at the comers of which one of the following?

A metal has FCC structure. Suppose its atomic weight and atomic radius is A and r respectively. Let N denotes Avogadro's number. What is the density of the material?

Consider the following temperature ranges: 1. Room temperature 2. 0 to 910°C 3. 910°C to 1400oC 4. 1400oC to below melting pointIn which of the above temperature ranges ferrite with body centered cubic structure isindicated in, the Fe-Fe3C phase diagram?

The effective number of lattice points in the unit cell of simple cubic, bodycentered cubic, and face cantered cubic space lattices, respectively, are

The micro structure composition of pearlite for a Fe3C diagram consists of

Atomic packing factor (APF) in the case of copper crystal is?

Which one of the following is the correct ascending order of packing density forthe given crystal structures of metals?

Assertion (A): Plastic deformation in metals and alloys is a permanentdeformation under load. This property is useful in obtaining products by coldrolling. Reason (R): Plastic or permanent deformation in metal or alloy is caused bymovement or dislocations.

The B.C.C. and H.C.P. metals undergo plastic deformation by:

GATE Mechanical (ME) Mock Test Series 2027

GATE Mechanical (ME) Mock Test Series 2027

Top Courses for Mechanical Engineering

About this Mechanical Engineering Practice Test

Explore more Mechanical Engineering Study Resources

Match the items in Column I and Column II.
Column I Column II
P. Charpy test 1. Fluidity
Q. Knoop test 2. Micro hardness
R. Spiral test 3. Formability
S. Cupping test 4. Toughness
5. Permeability

Consider the following temperature ranges:
1. Room temperature
2. 0 to 910°C
3. 910°C to 1400^oC
4. 1400^oC to below melting pointIn which of the above temperature ranges ferrite with body centered cubic structure isindicated in, the Fe-Fe₃C phase diagram?

The micro structure composition of pearlite for a Fe₃C diagram consists of

Assertion (A): Plastic deformation in metals and alloys is a permanentdeformation under load. This property is useful in obtaining products by coldrolling.
Reason (R): Plastic or permanent deformation in metal or alloy is caused bymovement or dislocations.