civil engineering engineering chemistry railway engineering cbse science class 10th class 11 railway track prototype transportation surveying theodolite rri in railway rri automatic warning system route relay interlocking panel interlocking calling on signal routing signal warner signal advance starter signal starter signal home signal stop signal semaphore signal interlocking devices interlocking railway interlocking railway signalling railway signal aman bathla hydrogen bond hybridization pi bond sigma bond dipole moment resonance structure valance bond therory molecular orbital theory molecular structure chemical bonding diamond crossing throw switch b. tech railway engineeing split switch stub switch guard rail frog check rail tongue rail stock rail switch right hand turnout left hand turnout movement of train from one track to another track diversion points and crossings cross-over turnout introduction to civil engineering shares industrial corridors mega ports mega cities current budget budget growth rate urban development twelfth five year plan five year plan economic growth economy smart cities infrastructure investment gdp infrastructure india infrastructure construction industry odometer spirit level chorobate rome surveying greece surveying babylon surveying 3-4-5 triangle merkhet groma square level plummet khufu surveying pyramid of giza surveying egypt surveying surveying techniques surveying equipment land aquisation yamuna expressway toll bot ppp model road network india indian roads constrction procurement epc public private partnership ppp highway finance science notes notes numerical tool ray optics optics ray diagram image formation lense formula mirror formula numerical physics light refraction reflection quiz chemical reaction chemical reaction & equation quiz-sheet civil engineering projects diploma projects polytechnic projects research & development project r&d hydraulic junkyard fyp final year project projects civil technical event taxiway runway apron hanger terminal building transportation engineering transport status in india characteristics limitations airport layout airports air transportation lanthanoide contraction inert pair effect diagonal relationship electron gain enthalpy & electro negativity elecro negativity chemical reactivity valancy electron gain enthalpy ionization enthalpy atomic radii atomic size position of element perodicity mnemonics memory technique periodic table classification of elements photoelectric effect plank's quantum theory dual nature electromagnetic spectrum electromagnetic radiations isoelectronics isotons isobars isotops rutherford model of atom thomson model of atom mass number atomic number neutron proton electronics structure of atom unit 2nd concentration molatity molarity limiting reagent stoichometry chemical equations molecular formula empirical formula mole concept law of chemical combinations percentage composition element compound & mixtures molecule atoms classification of matter significant figures chapter 1 chairs key bolts fish plate type of ballast cst sleeper pot sleeper cast iron sleeper steel sleeper concrete sleeper metal sleeper wooden sleeper spikes fastenings track fitting ballast sleeper permanent way creep effect creep causes creep theory rail failure creep on rail wear on rails defect in rails adzing of sleepers conning of wheel ideal rail section rail section sleepers gauge rails railway transportation in india railway transportation tuitions presentation ppt aicte regulatory body coaching industry jee advance coaching microsoft office use of clip art hbse india education system arbitrary conduct of coaching institute seconday education coaching availabilty indian entrance exam kota jee entrance exam coaching spaghetti bridge spaghetti arch truss bridge load bearing pops sticks truss bridge eiffel tower model geodesic dome model models spaghetti model popsickle stick tower spaghetti tower load bearing spaghetti tower diploma final year project cable stayed bridge engineering model popsickle sticks model working models load bearing pops sticks arch bridge geodesic dome suspension bridge & hydraulic bridge logitude nadir astronomical co-ordinate system latitude celestial sphere field astronomy altitude horizon system celestial pole & equator zenith & nadir astronomical terms latitude & longitude celestial pole zénith celestial equator astronomy celestial latitude & longitude earth at centre earth heavenly body shovel compaction excavation backfill scraper hoe bulldozer clamshell earthwork machinery earthwork clamshell bucket dragline dozer watering site clearing construction equipments backhoe fill spreading distance measurement b.tech higher education errors edm device phase difference method total station electronic distance measurement modulation & demodulation surveying equipments tellurometer geodimeter hared-wired algorithm electro-magnetic wave triangulation
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