19.3 Engineering Services 2018 GS Paper Solution Part-3 Presented by PAWAN SAINI
PAWAN SAIN ABOUT ME PAWAN SAINI Oriental Institute Of Science and Technology Bhopal ASSISTANT MANAGER IN RITES (A PSU under Ministry of Railways) Joined in 2013 posted at NTPC Sipat Project Previously Worked at SAlIL Bokaro Love to do Social Service Travelling Teaching Spiritual Activities IRIMEE DLW ICF IRITM TKD GOLDEN ROCK SAIL NTPC CIL BHEL
ESE 2018 GS Paper Solution 13. Statement (1): High strength, super-duralumin alloys are adopted in the manufacture of aero engines. Statement (lI): Precipitation heat treatment is adopted for duralumin products.
Ans. b) Duralumin is an alloy, a trade name given to the earliest types of the age hardenable aluminum alloys. It is an alloy made up of 90% aluminum,4% copper, 1% magnesium and 0.5% to 1% manganese It is a very hard alloy.
ESE 2018 GS Paper Solution 14. Statement 1): Metal carbides and carbon are used as i refractories as they resist oxidation. Statement-a): Metal carbides and carbon are not particilarly suitable for high temperature applications
Ans. c) In chemistry, a carbide is a compound composed of carbon and a less electronegative element. Carbides can be generally classified by the hemical bonds type as follows: (i) salt-like, (i) covalent compounds, (ii) interstitial compounds, and (iv) "intermediate" transition metal carbides. Metal carbides are used for high temperature application. Hence second statement is wrong.
ESE 2018 GS Paper Solution 15. Statement ): Long chain polymers are weak Statement ZI cerat chainsber with Van der Wals and metals. ost cha are bonded to each other with t?ain pol bonds.
Ans. a) Both the statements are correct and second is the correct explanation of first. Van der Waals forces' is a general term used to define the attraction of intermolecular forces between molecules. There are two kinds of Van der Waals forces: weak London Dispersion Forces and Vstronger dipole-dipole forces
ESE 2018 GS Paper Solution 16. Statement D Mechanically, pearlite has intermediate between the soer and the hard brittle cementite. ductile fe te Statement D: Alpha iron can be made magnetic an 768 C. ductile ferrite
Ans. c) Pearlite is a two-phased, lamellar (or layered) structure composed of alternating layers of ferrite (88 wt%) and cementite (12 wt%) that occurs in some steels and cast irons. 1st statement is correct. Alpha iron can be made magnetic below 768 degree Celsius and not above It is called curie temperature.
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Ans. c) Soft skills are a combination of people skills. social skills, communication skills, character traits, attitudes, career attributes, social intelligence and emotional intelligence quotients among others Example: Communication Skills, Making Decisions, Self Motivation, Leadership Skills. Statement 2 is wrong.
ESE 2018 GS Paper Solution 19. Statement (I): What is legal may not always be ethical. Statement (I): Ethical standards and the law, share the same theme, i.e., what is permissible. and impermissible
Manager PSU, Worked @ SAIL, Cleared GATE 2012, 2013, SSC JE, CDS, AFCAT, BARC. Best of luck for ESE Prelims.