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Manufacturing and Production: Part 25
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Machinability

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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hii sir ,Good evening. sir Actually I am net preparing student, so I want to learn probability and pedigree questions solve trick
  1. 1 manufacturing and production


  2. HELLO! l am ASHISH FUTTAN MTECH-IT BOMBAY TOP STAR EDUCATOR VERIFIED EDUCATOR CRACKED VARIOUS IITs 3 TIMES GATE QUALIFIED PUBLISHED MORE THAN 600 LESSONS


  3. IES 2012 The usual method of defining machinability of a material is by an index based on (a) Hardness of work material (b) Production rate of machined parts (c) Surface finish of machined surfaces (d) Tool life


  4. IAS 1996 Assertion (A): The machinability of a material can be measured as an absolute quantity. Reason (R): Machinability index indicates the case with which a material can be machined (a) Both A and R are individually true and R is the correct explanation of A explanation of A (c) A is true but R is false (d) A is false but R is true


  5. IES 1992 Tool life is generally better when (a) Grain size of the metal is large (b) Grain size of the metal is small (c) Hard constituents are present in the microstructure of the tool material (d) None of the above


  6. IAS - 2000 Consider the following statements: The tool life is increased by 1. Built -up edge formation 2. Increasing cutting velocity 3. Increasing back rake angle up to certain value Which of these statements are correct? (a) 1 and 3 (b) 1 and 2 (c) 2 and 3 (d) 1, 2 and 3


  7. IES 1992 Ease of machining is primarily judged by (a) Life of cutting tool between sharpening (b) Rigidity of work -piece (c) Microstructure of tool material (d) Shape and dimensions of work


  8. IES 2007, 2009 Consider the following: 1. Tool life 2. Cutting forces 3. Surface finish Which of the above is/are the machinability criterion/criteria? (a) 1, 2 and 3 (b) 1 and 3 only (c) 2 and 3 only (d) 2 only


  9. ISRO-2007 Machinability depends on (a) Microstructure, physical and mechanical properties and composition of workpiece material (b) Cutting forces (c) Type of chip (d) Tool life


  10. IES 2003 Assertion (A): The machinability of steels improves by adding sulphur to obtain so called 'Free Machining Steels'. Reason (R): Sulphur in steel forms manganese sulphide inclusion which helps to produce thin ribbon like continuous chip. (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