Bissoy.com
Doctors Medicines MCQs Q&A

Which of the following statements apply to provision of flash gutter and flash land around the parts to be forged? 1. Small cavities are provided which are directly outside the die impression. 2. The volume of flash land and flash gutter should be about 20%-25% of the volume of forging. 3. Gutter is provided to ensure complete closing of the die.

Which of the following statements apply to provision of flash gutter and flash land around the parts to be forged? 1. Small cavities are provided which are directly outside the die impression. 2. The volume of flash land and flash gutter should be about 20%-25% of the volume of forging. 3. Gutter is provided to ensure complete closing of the die. Correct Answer 1, 2 and 3

Explanation:

  • The excess metal added to the stock to ensure complete filling of the die cavity in the finishing impression is called flash.
  • Flash acts as a cushion for impact blows from the finishing impression and also helps to restrict the outward flow of metal, thus helping in the filling of thin ribs and bosses in the upper die.
  • The amount of flash depends on the forging size and may vary from 10 to 50%. Flash is provided uniformly around the periphery of the forging in the parting plane.
  • Forging load is inversely proportional to the average thickness of the component. So it is difficult to forge a thin component than thicker ones.
  • In addition to the flash, provision should be made in the die for additional space so that any excess metal can flow and help in the complete closing of the die.
  • This is called the gutter. Without a gutter, the flush may become excessively thick, not allowing the dies to close completely. The gutter should be more than the flash provided.
  • The flash land provided in the die should be about 3% of the maximum forging thickness (0.5 mm to 8 mm).
  • If the flash land is too small then the energy required for forging increases because of excess metal trapped in the finishing impression and the flash land wears out quickly.
  • Similarly, too high a flash land lets the work material to flow into the gutter and thus the die cavity gets unfilled.

Related Questions

Consider the following statements: 1. Additional cavities serve to velocity-modulate the electron beam and produce an increase in the energy available at the output. 2. The addition of intermediate cavities between the input and output cavities of the basic klystron greatly improves the amplification, power output, and efficiency of the klystron. Which of the above statements is/are correct?
Each of the following problem has a question and two statements which are labeled 1. and. Use the data given in 1. and 2. to decide whether the statements are sufficient to answer the question.Select one of the following . a.Statements (1) ALONE is sufficient,but (2) ALONE is not sufficient. b.Statements (2) ALONE is sufficient,but (1) ALONE is not sufficient. c. Both statement TOGETHER are sufficient but statement alone is sufficient . A fly crawls around the outside of a circle once.A second fly crawls around the outside of a square once.Which fly travels further ? (1) The diagonal of the square is equal to the diagonal of the circle.(2) The fly crawling around the circle took more time to complete has journey than the fly cawing around the square.
For the minimum metal loss, the flash-less forging is better than the impression die forging.
Closed die forging process is also called as impression die forging.
Consider the following statements about forging: 1. Forgings have high strength and ductility. 2. Forgings offer great resistance to impact and fatigue loads. 3. Forging assures uniformity in density as well as dimensions of the forged parts. Which of the above statements are correct?
Consider an enclosure formed by three surfaces having the following values of shape factors, emissivities and temperatures Surface 1 i.e. curved cylindrical has an emissivity 0.75 and temperature 800 K Surface 2 i.e. closing disc has an emissivity 0.8 and temperature 700 K Surface 3 i.e. closing disc has an emissivity 0.8 and temperature 700 K The closing flat discs are 25 mm in diameter and they have interspacing distance equal to 100 mm. If the shape factor between these two identical discs is 0.05, calculate the net rate of radiant heat flow from the curve surface to each of the closing end surface
In the question below, are given a statement followed by three courses of actions numbered I, II and III. On the basis of the information given, you have to assume everything in the statement to be true, and then decide which of the suggested course of action logically follow (s) for pursuing. Statement: The India Risk Survey 2017 report ranks 'Information & Cyber Insecurity' as the biggest risk facing Indian companies. Indian organizations, both public and private, had witnessed over 27,000 incidents of security threat, from January 2017 till June 2017 alone. Phishing, scanning/probing, website intrusions and defacements, virus/malicious code, ransomware, Denial of Service attacks, and data breaches are some ways in which hackers attack business websites, which can cause operational disruptions and potentially steal sensitive information. Small and medium businesses (SMBs), unfortunately, have been seeing rising incidences of cybercrime. In fact, 70 percent of cyberattacks occur at organizations with lesser than 100 employees  Courses of action: I. Mandate basic security practices and policies for all employees, such as 2-factor authentication, internet use guidelines and create and enforce rules on handling and protecting sensitive data. Conduct frequent training to sensitize employees about opening suspicious emails, encrypting their data, using strong passwords on their devices, installing security apps, and limiting activity over public Wi-Fi. Implement and enforce incident reporting to help ensure that even the smallest breach is report to management as well as the IT teams. II. Basics still matter and are some of the best defenses against viruses, malware, and other online threats. Assess the assets that are most at risk - data, servers, network - and ensure that the systems are updated with the latest security software, web browser, and operating system. Implement firewall security and run antivirus software after each update.  III. Ensure regular backup of all critical data - whether stored in-house or on the cloud. Run scheduled attack drills and stress tests to identify vulnerabilities and ensure that data restoration and business continuity are executed as planned.
Consider the following statements regarding defects in forgings 1. Flakes are internal breaks or ruptures occurring in some grades of alloy steel. 2. Die shift is caused by misalignment between the top and bottom forging dies. 3. Fins and rags are small projections or loose metal driven into the surface of the forging. Which of the above statements are correct ? 
Which of the following statements is/ are true ? A. The terms 'true' and 'false' apply to arguments. B. The terms 'true' and 'false' apply to statements. C. The terms 'valid' and 'invalid' apply to arguments. D. The terms 'cogent' and 'non-cogent' apply to statements. Choose the correct answer from the options given below:
Consider the following statements:
In tort of defamation, the words must be defamatory. For this purpose,
1. The statement should be read as a whole
2. The words must be given their natural and ordinary meaning.
3. The impression should be gathered from first reading.
4. The impression should be gathered on reading the statement not on later analysis.
Which of the statements given above are correct?