if you want to remove an article from website contact us from top.

    in which of the following process the ductility of material decreases

    Mohammed

    Guys, does anyone know the answer?

    get in which of the following process the ductility of material decreases from screen.

    [Solved] Ductility of steel is reduced by

    Explanation: Ductility: A metal is said to be ductile when it can be drawn out into wires under tension without rupture. Wire drawing depends up

    Home Production Engineering (Manufacturing) Metal Forming Hot Working and Cold Working

    Question

    Download Solution PDF

    Ductility of steel is reduced by

    This question was previously asked in

    ISRO Refrigeration and Air Conditioning 2013

    Download PDF Attempt Online

    View all ISRO Scientist ME Papers >

    Hot rolling Cold working Piercing Annealing

    Answer (Detailed Solution Below)

    Option 2 : Cold working

    Crack with

    India's Super Teachers

    FREE

    Demo Classes Available*

    Explore Supercoaching For FREE

    Free Tests

    View all Free tests >

    FREE

    ST 1: Engineering Materials (Crystal Geometry)

    0.7 K Users

    16 Questions 8 Marks 20 Mins

    Start Now

    Detailed Solution

    Download Solution PDF

    Explanation:Ductility: A metal is said to be ductile when it can be drawn out into wires under tension without rupture. Wire drawing depends upon the ductility of a metal. A ductile metal must be both strong and plastic. Copper and aluminum are good examples of ductile metals.

    Cold working or Cold Forming:

    Cold working is the plastic deformation process where metal is processed below the re-crystallization temperature.

    Most of the time cold forming is done at room temperature.

    The major cold-working operations can be classified basically as rolling, squeezing, bending, shearing, and drawing.

    Advantages:

    No heating required.

    A better surface finishes obtained.

    Superior dimension control.

    Better reproducibility and interchangeability of parts.

    Improved strength properties like fatigue strength and tensile strength.

    Disadvantages:

    Higher forces required for deformation

    Heavier and more powerful equipment required

    Less ductility available

    Metal surfaces must be clean and scale-free

    Strain hardening occurs

    Materials used for cold working

    Low and medium carbon steels, low alloy steels, copper and light alloys, Titanium and beryllium

    Additional Information

    Hot rolling:

    Hot-working is the metal processing that is done above re-crystallization temperatures of metal.

    For the manufacturing of railways tracks stainless steel is used & it is manufactured using on I-section hot rolling as shown below.

    In the process of hot-working, plasticity of rail components increase and its tendency to fracture decrease.

    Piercing:

    It is a process by which a hole is cut (or torn) in metal. It is different from punching in that piercing does not generate a slug.

    In hole cutting operation, the metal cut out is the scrap. Hence any shear provided must be ground on the punch.

    The main purpose of shear is to reduce the load placed on the punches to accomplish the piercing.

    Piercing operation:

    Punch size = blank size

    Die size = blank size + 2 x clearance

    So in piercing punch is of the exact size, clearance is provided on a die, and shear is provided on the punch.

    Annealing:

    Annealing involves heating the steel to a suitable temperature, holding it at that temperature for some time, and then cooling it slowly.

    There are different methods of cooling.

    The main purpose of Annealing is to reduce the hardness of a material.

    Besides this, it is also used -

    To relieve the internal stress of a material

    To restore ductility to perform the further operation on the material

    To increase the machinability of the material

    To induce softness

    Download Solution PDF

    Share on Whatsapp

    Latest RPSC Lecturer Tech Edu Updates

    Last updated on Sep 22, 2022

    The Rajasthan Public Service Commission (RPSC) has declared the Interview Result and Cut Off for RPSC Lecturer Tech Edu (Mathematics Lecturer) recruitment exam. The Rajasthan Public Service Commission had released 39 vacancies in 7 subjects for the post of Lecturer for the Technical Education Department. The RPSC Lecturer selection process consists of a written examination (objective type) and an interview. The candidates can check their RPSC Lecturer Tech Edu Result from here.

    India’s #1 Learning Platform

    Start Complete Exam Preparation

    Daily Live MasterClasses

    Practice Question Bank

    Mock Tests & Quizzes

    Get Started for Free

    Download App

    Trusted by 3.4 Crore+ Students

    ‹‹ Previous Ques Next Ques ››

    More Hot Working and Cold Working Questions

    Q1. Which of the following statements is INCORRECT?Q2. A, B and C can complete a certain work in 30 days. B and C together can complete the same work in 45 days. If B is 20% more efficient than A then B alone can complete one-third of the same work in:Q3. The ductility of a material after work hardeningQ4. ________ is the point at which new grains structures are formed in the metal.Q5. Work hardening is ductile material increases itsQ6. A disadvantage of cold working of metals isQ7. Ductility of steel is reduced byQ8. Hot working of metals refers to which one of the following temperature regions relative to the melting point (Tm) of the given metal on an absolute temperature scale?

    स्रोत : testbook.com

    Solved ?in which of the following process the ductility of

    Answer to Solved ?in which of the following process the ductility of

    © 2003-2022 Chegg Inc. All rights reserved.

    स्रोत : www.chegg.com

    Forming

    This set of Manufacturing Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Forming”. 1. Depending upon the temperature the forming process can be classified as? a) Hot working b) Cold working c) Warm working d) All of the mentioned 2. If Tm is the melting temperature, then in hot working the value for that ... Read more

    Manufacturing Engineering Questions & Answers – Forming

    « Prev Next »

    This set of Manufacturing Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Forming”.

    1. Depending upon the temperature the forming process can be classified as?

    a) Hot working b) Cold working c) Warm working

    d) All of the mentioned

    View Answer

    2. If Tm is the melting temperature, then in hot working the value for that material is?

    a) 0.5 Tm b) 0.6 Tm c) 0.4 Tm d) 0.7 Tm View Answer

    3. In which of the following process no strain hardening is produced?

    a) Hot working b) Cold working c) Warm working d) Cannot say View Answer

    Subscribe Now: Manufacturing Processes I Newsletter | Important Subjects Newsletters

    advertisement

    4. During hot working, the grain growth can take place in which part of the material?

    a) Exterior b) Interior c) Along the edges d) Side faces View Answer

    5. Which of the following defect is eliminated by hot working process?

    a) Cold shut b) Misrun c) Blow holes d) Fusion View Answer

    Become Top Ranker in Manufacturing Processes I Now!

    6. The working temperature of cold working is below a certain temperature. That temperature is known as?

    a) Critical temperature

    b) Recrystallization temperature

    c) Transition temperature

    d) Curie temperature

    View Answer

    7. In which of the following process the ductility of material decreases?

    a) Hot working b) Cold working c) Warm working d) Cannot say View Answer advertisement

    8. Which of the following statement is true about cold working?

    a) Strain hardening is relieved

    b) No oxidation occurs

    c) Only limited amount of reduction can be done

    d) Cost of machining is high

    View Answer

    9. In which of the following process plastic deformation takes place?

    a) Cold working b) Hot working

    c) Both cold working and hot working

    d) Cannot say View Answer advertisement

    10. In metal forming process the hardness of the material?

    a) Decreases b) Remains same

    c) Initially increases and then decreases

    d) Increases View Answer

    11. The work involved with the internal shearing process due to non-uniform deformation is?

    a) Ideal work b) Frictional work c) Redundant work d) Slip work View Answer

    12. Which of the following method is used for analyzing metal forming processes?

    a) Slab method

    b) Upper bound method

    c) Slip line method

    d) All of the mentioned

    View Answer

    13. Which of the following method is commonly used for analyzing metal forming processes?

    a) Slab method

    b) Upper bound method

    c) Slip line method d) Empirical method View Answer

    14. Warm working is done at a temperature?

    a) Above re crystallization temperature

    b) Below re crystallization temperature

    c) Equal to re crystallization temperature

    d) Below re crystallization temperature and above room temperature

    View Answer

    15. Which process got a better dimensional accuracy?

    a) Hot working b) Cold working c) Warm working

    d) Both Hot working and Cold working

    View Answer

    Sanfoundry Global Education & Learning Series – Manufacturing Engineering.

    To practice all areas of Manufacturing Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.

    « Prev - Manufacturing Engineering Questions & Answers – Casting Techniques Single Crystal Components

    » Next - Manufacturing Engineering Questions & Answers – Introduction To Forging and Extrusion Process

    Next Steps:

    Get Free Certificate of Merit in Manufacturing Processes I

    Participate in Manufacturing Processes I Certification Contest

    Become a Top Ranker in Manufacturing Processes I

    Take Manufacturing Processes I Tests

    Chapterwise Practice Tests: Chapter 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

    Chapterwise Mock Tests: Chapter 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

    Related Posts:

    Buy Mechanical Engineering Books

    Apply for Mechanical Engineering Internship

    Apply for Manufacturing Processes I Internship

    Apply for Metallurgical Engineering Internship

    Buy Manufacturing Processes I Books

    advertisement

    Recommended Articles:

    Forming Questions and Answers – Advantage and Disadvantage of Hot and Cold Forming

    Forming Questions and Answers – Open and Closed Die Forging

    Manufacturing Processes Questions and Answers – Annealing – 3

    Forming Questions and Answers – Behaviour in Metal Forming

    Forming Questions and Answers – Classification of Metal Forming Processes

    Manufacturing Processes Questions and Answers – Annealing – 5

    Manufacturing Engineering Questions & Answers – Introduction To Forging and Extrusion Process

    Forming Questions and Answers – Cold Rolling

    Forming Questions and Answers – Stretch Forming

    Manufacturing Processes Questions and Answers – Roll Forming – 2

    advertisement

    Additional Resources:

    Casting, Forming and Welding II MCQ Questions

    Casting, Forming and Welding MCQ Questions

    स्रोत : www.sanfoundry.com

    Do you want to see answer or more ?
    Mohammed 4 day ago
    4

    Guys, does anyone know the answer?

    Click For Answer