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q what do you mean by weld and hold timeweld timeduring this period the welding current flows through the circuit ie it enters from one electrode
q what is squeeze timeit is the time between the initial application of the electrode pressure on the work and the initial application of current to
the total resistance of the system between the electrodes consists ofi the resistance of the work piece r1ii the contact resistance between the
q define current for electrical resistance welding- with other parameters kept constant the temperature in resistance welding is regulated by
q define heat for electrical resistance weldingthe heat h for electrical resistance welding is generated by passing a large electrical current of
q what is mapp gas weldingmethyl acetylene-propadiene-petroleum m inert than other gas mixtures making it safer for use and store mapp can also be
q describe the types of gas weldinggas welding involves the use of a gas-fed flame torch to heat the metal work piece and the filler material to
q define gas weldingmetal joining process in which the ends of pieces to be joined are heated at their interface by producing coalescence with one or
q which functions used for coatingbullimproves arc stability by providing certain chemical which have this ability by ionizing the path of
q what is electrode coatingsbullslag forming ingredients asbestos mica silica fluorspar titanium dioxide iron oxide magnesium carbonate calcium
q describe the selection of elctrodesthe selection of a proper electrode for electric arc welding is very important to obtain a sound welded joint of
q what is coated electrodethese types of electrodes are prepared by coating of flux on metal wire due to arc metal electrode melts and used as filler
q explain the use of bare electrodethis type of electrode is also known as plain electrode no flux covers on this electrode these types of electrodes
q describe about consumable electrodethis type of electrode is prepared from metal its one end is kept in electrode holder and then electric supply
q define non - consumable electrodethese types of electrodes are prepared from high melting point materials mainly carbon pure tungsten and its alloy
q what is the use of welding electrodean electrode is a piece of wire or a rod of a metal or alloy with or without flux covering which carries
define the adjustable auger mechanismsthey improved mounting arrangement for the auger and auger drive mechanism of a floating screed type asphalt
what is the problem in paving material distribution systemjames h bassett found the problem in paving material distribution system in particular
screw conveyor screw conveyor during mixing and flow directing paddles are selectively adjustable for use on a wide variety of materials having
use of auger extension for extended screedan improved extended auger arrangement and an improved asphalt paver with a tractor unit and a screed
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explain asphalt paving machinein the laying of asphalt pavement roadways it is common practice to utilize floating screed type paving machines these
explain the hydraulically extendiblemost paver manufacturers have developed hydraulically extendable paver screeds hat trail the primary or basic
function of screw conveyor with augerto spread the road making raw material on the road during the operationan augercut off assembly for a floating