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civil engineering engineering chemistry railway engineering cbse transportation class 10th science class 11 prototype railway track surveying theodolite defect in rails wear on rails microsoft office use of clip art creep on rail rail failure hbse creep theory creep causes india education system creep effect permanent way sleeper ballast track fitting fastenings regulatory body aicte ppt presentation tuitions coaching industry railway transportation railway transportation in india jee advance rails gauge coaching sleepers rail section ideal rail section conning of wheel adzing of sleepers law of chemical combinations mole concept empirical formula molecular formula chemical equations stoichometry limiting reagent molarity molatity concentration unit 2nd structure of atom electronics proton neutron atomic number mass number thomson model of atom rutherford model of atom isotops spikes wooden sleeper metal sleeper concrete sleeper steel sleeper cast iron sleeper pot sleeper cst sleeper type of ballast fish plate bolts key chairs chapter 1 significant figures classification of matter atoms molecule element compound & mixtures percentage composition site clearing watering dozer dragline clamshell bucket earthwork earthwork machinery clamshell bulldozer hoe scraper backfill excavation compaction shovel heavenly body earth earth at centre celestial latitude & longitude astronomy triangulation electro-magnetic wave hared-wired algorithm geodimeter tellurometer surveying equipments modulation & demodulation electronic distance measurement total station phase difference method device edm errors higher education b.tech distance measurement spreading fill backhoe construction equipments engineering model cable stayed bridge diploma final year project load bearing spaghetti tower spaghetti tower popsickle stick tower spaghetti model models geodesic dome model eiffel tower model load bearing pops sticks truss bridge spaghetti arch truss bridge spaghetti bridge entrance exam coaching jee kota indian entrance exam coaching availabilty seconday education arbitrary conduct of coaching institute celestial equator ³úé²Ô¾±³Ù³ó celestial pole latitude & longitude astronomical terms zenith & nadir celestial pole & equator horizon system altitude field astronomy celestial sphere latitude astronomical co-ordinate system nadir logitude suspension bridge & hydraulic bridge geodesic dome load bearing pops sticks arch bridge working models popsickle sticks model smart cities economy economic growth five year plan twelfth five year plan urban development growth rate budget current budget mega cities mega ports industrial corridors shares introduction to civil engineering turnout cross-over points and crossings diversion movement of train from one track to another track left hand turnout surveying techniques egypt surveying pyramid of giza surveying khufu surveying plummet square level groma merkhet 3-4-5 triangle babylon surveying greece surveying rome surveying chorobate spirit level odometer construction industry india infrastructure infrastructure gdp infrastructure investment right hand turnout hybridization hydrogen bond aman bathla railway signal railway signalling railway interlocking interlocking interlocking devices semaphore signal stop signal home signal starter signal advance starter signal warner signal routing signal calling on signal panel interlocking route relay interlocking automatic warning system rri switch stock rail tongue rail check rail frog guard rail stub switch split switch railway engineeing b. tech throw switch diamond crossing chemical bonding molecular structure molecular orbital theory valance bond therory resonance structure dipole moment sigma bond pi bond rri in railway elecro negativity electron gain enthalpy & electro negativity diagonal relationship inert pair effect lanthanoide contraction air transportation airports airport layout limitations characteristics status in india transport transportation engineering terminal building hanger apron runway taxiway technical event civil isobars isotons isoelectronics electromagnetic radiations electromagnetic spectrum dual nature plank's quantum theory photoelectric effect classification of elements periodic table memory technique mnemonics perodicity position of element atomic size atomic radii ionization enthalpy electron gain enthalpy valancy chemical reactivity projects image formation ray diagram optics ray optics numerical tool notes science notes highway finance ppp public private partnership epc procurement constrction indian roads road network india ppp model bot toll yamuna expressway land aquisation final year project fyp junkyard hydraulic r&d research & development project polytechnic projects diploma projects civil engineering projects quiz-sheet chemical reaction & equation chemical reaction quiz reflection refraction light physics numerical mirror formula lense formula surveying equipment