Heat Treatment Of Metals And Elastomer - MCQ Test 1


20 Questions MCQ Test Mock Test Series - Mechanical Engineering (ME) for GATE 2020 | Heat Treatment Of Metals And Elastomer - MCQ Test 1


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This mock test of Heat Treatment Of Metals And Elastomer - MCQ Test 1 for Mechanical Engineering helps you for every Mechanical Engineering entrance exam. This contains 20 Multiple Choice Questions for Mechanical Engineering Heat Treatment Of Metals And Elastomer - MCQ Test 1 (mcq) to study with solutions a complete question bank. The solved questions answers in this Heat Treatment Of Metals And Elastomer - MCQ Test 1 quiz give you a good mix of easy questions and tough questions. Mechanical Engineering students definitely take this Heat Treatment Of Metals And Elastomer - MCQ Test 1 exercise for a better result in the exam. You can find other Heat Treatment Of Metals And Elastomer - MCQ Test 1 extra questions, long questions & short questions for Mechanical Engineering on EduRev as well by searching above.
QUESTION: 1

The ductility of a material with work hardening  

Solution:

Ans. (b)

QUESTION: 2

In the case of rubber, vulcanization refers to the process of producing a  

Solution:

Ans. (c) An elastomer is produced by heating raw rubber with sulphur. Sulphur forms covalent bonds with the carbon, by saturating the remaining double bond in each monomer.
This reaction, known as vulcanization, produces additional link between chains called cross
links.

QUESTION: 3

From the lists given below, choose the most appropriate set of heat treatmentprocess and the corresponding process characteristics 

Solution:

Ans. (c)

QUESTION: 4

Which one of the following is true? 

Solution:

Ans. (c)

QUESTION: 5

Match List I with List II and select the correct answer: 


Solution:

Ans. (d)

QUESTION: 6

On completion of heat treatment, the resulting structure will have retainedAustenite if 

Solution:

Ans. (c)

QUESTION: 7

Which of the following fibre materials are used for reinforcement in compositematerials? 
1. Glass
2. Boron carbide
3. Graphite
Select the correct answer using the codes given below:

Solution:

Ans. (d)

QUESTION: 8

During heat treatment of steel, the hardness of various structures in increasing order are 

Solution:

Ans. (d)

QUESTION: 9

Consider the following statements:
The strength of the fibre reinforced plastic product
1. Depends upon the strength of the fibre alone
2. Depends upon the fibre and plastic
3. Is isotropic
4. Is anisotropic
Which of these statements are correct?

Solution:

Ans. (d) Fibre Reinforced plastics are composite materials possessing additional and/or superior properties to individual components.

QUESTION: 10

Carburized machine components have high endurance limit becausecarburization 

Solution:

Ans. (c)

QUESTION: 11

Wood is a natural composite consisting of which of the following?  

Solution:

Ans. (d)

QUESTION: 12

TTT diagram indicates time and temperature transformation of  

Solution:

Ans. (d)

QUESTION: 13

Which one of the following materials is not a composite? 

Solution:

Ans. (d) SIALON: Hot pressing and sintering of an appropriate mix of Al2O3 and Si3N4
powders yielded an excellent composite ceramic tool called SIALON which are very hot hard, quite tough and wear resistant. These tools can machine steel and cast irons at high speeds (250 – 300 m/min). But machining of steels by such tools at too high speeds reduces the tool life by rapid diffusion.

QUESTION: 14

The iron-carbon diagram and the TTT curves are determined under 

Solution:

Ans. (a)

QUESTION: 15

Nano composite materials are highly preferable in design consideration for their   

Solution:
QUESTION: 16

Consider the following treatments: 
1. Normalizing
2. Hardening
3. Martempering
4. Cold working

Hardness and tensile strength in austenitic stainless steel can be increased by

Solution:

Ans. (d) Hardness and tensile strength in austenitic steel can be increased by cold working alone.

QUESTION: 17

Which of the following composites are 'dispersion-strengthened composites’?

Solution:

Ans. (a)
1. Particulate composites consist of discrete particles of one material surrounded by a
matrix of another material.

2. Dispersion-strengthened materials are particulate composites where a small amount of hard, brittle, small particles (typically, oxides or carbides) are dispersed through-out a softer, more ductile matrix.

QUESTION: 18

Quenching in not necessary when hardening is done by  

Solution:
QUESTION: 19

Two plain carbon steel specimens having 0·8% carbon content are welded. If weobserve the weldment under Metallurgical Microscope from centre towards eitherside, the following structures are observed at different zones: 
1. Fine Pearlite
2. Coarse Pearlite
3. Martensite
Select the correct sequence using the codes given below:
Codes:

Solution:

Ans. (d)
Maximum cooling rate produces Martensite
Medium cooling rate produces Fine pearlite
Low cooling rate produces coarse pearlite.

QUESTION: 20

If the surface of a component is heavily stressed while the stresses in the core areof comparative small magnitude, which one of the following heat treatment methods is employed?  

Solution:

Ans. (c) case carburizing if they do not respond to quenching process.

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