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Manufacturing and Production: Part 9
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Forging defects

Ashish Futtan is teaching live on Unacademy Plus

Ashish Futtan
MTECH IIT Bombay|Quora Top Writer for GATE Mechanical 2019|Cracked IIT (ISM) Dhanbad,IIT DELHI|3 times GATE qualified| Singer|

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  1. manufacturing and production


  2. HELLO! I am ASHISH FUTTAN MTECH-IIT BOMBAY TOP STAR EDUCATOFR VERIFIED EDUCATOR CRACKED VARIOUS IITS 3 TIMES GATE QUALIFIED PUBLISHED MORE THAN 600 LESSONS


  3. lAS - 1998 The forging defect due to hindrance to smooth flow of metal in the component called Lap occurs because (a) The corner radius provided is too large (b) The corner radius provided is too small (c) Draft is not provided (d) The shrinkage allowance is inadequate


  4. IES 2011 Assertion (A) : Hot tears occur during forging because of inclusions in the blank material Reason (R) : Bonding between the inclusions and the parent material is through physical and chemical bonding. (a) Both A and R are individually true and R is the correct explanation of A (b) Both A and R are individually true but R is NOT the correct explanation of A (c) A is true but R is false (d) A is false but R is true


  5. GATE-2008 (PI) Match the following Group -1 Group-2 P. Wrinkling Q. Centre burst R. Barrelling S. Cold shut 1. Upsetting 2. Deep drawing 3. Extrusion 4. Closed die forging (a) P - 2, Q - 3, R - 4, S-1 (c) P - 2, Q - 3, R - 1, S-4 (b) P - 3, Q - 4, R - 1, S-2 (d) P - 2, Q - 4, R - 3, S-1


  6. IES-2013 Consider the following statements pertaining to the open- die forging of a cylindrical specimen between two flat dies: 1. Lubricated specimens show more surface movement than un- lubricated ones 2. Lubricated specimens show less surface movement than un- lubricated ones 3. Lubricated specimens show more barrelling than un-lubricated ones 4. Lubricated specimens shows less barrelling than un-lubricated ones. Which of these statements are correct? (a) 1 and 3 (b) 1 and 4 (c) 2 and 3 (d) 2 and 4


  7. GATE -2010 (PI) Hot die steel, used for large solid dies in drop forging, should necessarily have (a) high strength and high copper content (b) high hardness and low hardenability (c) high toughness and low thermal conductivity (d) high hardness and high thermal conductivity


  8. IES-2013 Statement (I): In power forging energy is provided by compressed air or oil pressure or gravity Statement (I): The capacity of the hammer is given by the total weight, which the falling pans weigh. (a) Both Statement (I) and Statement (Il) are individually true and (b) Both Statement (l) and Statement (Il) are individually true but (c) Statement (I) is true but Statement (II) is false Statement (II) is the correct explanation of Statement (I) Statement (II) is not the correct explanation of Statement (I) (d) Statement (I) is false but Statement (II) is true


  9. GATE-2014 The relationship between true strain (eT ) and engineering strain (e ) in a uniaxial tension test is


  10. GATE-1992, ISRO-2012, VS-2013 The true strain for a low carbon steel bar which is doubled in length by forging is (a) 0.307 (b) 0.5 (c) 0.693