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


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20 Questions MCQ Test GATE Mechanical (ME) 2023 Mock Test Series | Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1

Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 for Mechanical Engineering 2023 is part of GATE Mechanical (ME) 2023 Mock Test Series preparation. The Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 MCQs are made for Mechanical Engineering 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 below.
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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

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

Ans. (d)

Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 2

Decreasing grain size in a polycrystalline material  

Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 3

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

Detailed Solution for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 3

Ans. (c)

Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 4

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

Detailed Solution for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 4

Ans. (c)

Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 5

Herbert cloudburst Hardness test is conducted to know 

Detailed Solution for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 5

Ans. (a)
In this metal surface is subjected to rain of several hundred thousand 3 mm diameter hard steel balls talling from a known height. The impact of each ball produces an imprint varying inversely in size with the hardness of the material at the point of impact. The imprint-size pattern shows whether or not there is uniformity of hardness over the entire test are.

Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 6

Which of the following statement is true about brittle fracture?  

Detailed Solution for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 6

Ans. (b)

Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 7

A measure of Rockwell hardness is the  

Detailed Solution for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 7

Ans. (a)

Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 8

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

Detailed Solution for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 8

Ans. (c) The material property which depends only on the basic crystal structure is fracture strength. Elastic constant depends not only on material parameters but also on the experimental geometry.

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

Detailed Solution for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 9

Ans. (b)

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

Detailed Solution for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 10

Ans. (b)
No of lattice point = 1 + (1/4) x 1 = 2; area a2 planner densiy = 2 / a2

Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 11

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

Detailed Solution for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 11

Ans. (b) Plane (100) intercepts (1,α,α )

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

Detailed Solution for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 12

Ans. (a)

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

Detailed Solution for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 13

Ans. (b)
latice conotant (a) = 
For F.C.C. n = 4,
or   or 

Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 14

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?

Detailed Solution for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 14

Ans. (a)

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

Detailed Solution for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 15

Ans. (b)

Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 16

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

Detailed Solution for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 16

Ans. (d)

Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 17

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

Detailed Solution for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 17

Ans. (c)

Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 18

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

Detailed Solution for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 18

Ans. (c)

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

Detailed Solution for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 19

Ans. (c) The deformation of metals, which is caused by the displacement of the atom is
achieved by one or both of the processes called slip and twinning.

Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 20

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

Detailed Solution for Test: Basic Concepts (Structure Of Solids), Hardness Test & Crystalline Material - 1 - Question 20

Ans. (d)

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