Prepare for your examinations with a set of multiple choice questions (MCQs) related to Gas Metal-Arc Welding for Welder Trade. The questions are likely designed to test a user’s knowledge or understanding of Mechanic Diesel concepts and may be useful for exam preparation or self-assessment. The website may be a helpful resource for individuals studying to become Welder or seeking to improve their understanding of Welder principles.

Gas Metal Arc Welding-2

What is the operation of heating steel to a specific temperature and cooling suddenly? Annealing Hardening Tempering Quenching

What is the main purpose of 'Normalising' steel? To control hardness To prevent cracking To make welding operation easier To produce fine grain of uniform structure

Which heat treatment process, if material is softened and suitable for machining? Annealing Tempering Normalising Case hardening

What is the name of the heat treatment process where the steel is reheated to a suitable temperature below the critical point (heating) to improve the toughness and ductility? Annealing Hardening Tempering Normalising

Which heat treatment process is very similar to annealing but the job is allowed to cool in air? Hardening Tempering Normalising Case hardening

What type of test is used for vessels, tanks and pipes containing pressure? Visual inspection Leak or pressure test Stethoscopic test Magnetic particles test

What is the NDT method, used to detect surface and subsurface defects on ferrous metals, using iron power? X-ray test Gamma ray test Magnetic particle test Stethoscopic test

What Non-destructive test is done using coloured dye and fluorescent liquid to find minute cracks? Radiographic test Magnetic test Ultrasonic test Liquid penetration test

Which welding process is done by chemical reaction between a metal oxide and metal? Electro slag welding Thermit welding Election beam welding TIG welding

How much time it takes for the thermit mould to cool, after welding by thermit process? 7 Hrs 9 Hrs 10 Hrs 12 Hrs

What is the reason that obstructed joints cannot be welded by the electron beam welding process? Electron beam travel in curved line Electron beam travel in different direction Electron beam travel only in straight line Electron beam travel in circular line

How much gas flow rate is required to weld a butt joint with 0.8 mm dia MS filler rod of wire feed rate 3 - 4 m/min at 18 to 20 volts? 6 to 8 Lpm 8 to 10 Lpm 10 to 12 Lpm 12 to 14 Lpm

What should be the initial angle of two plates in a T joint if the final angle between them is 90° after completion of welding? 93° 90° 85° 75°

What is the percentage of deposition efficiency in the FCAW process? 93% to 97% 80% to 86% 70% to 76% 60% to 67%

Which gas/mixture is likely to reduce the spatter loss in FCAW? Argon and Co2 mixed Argon and helium mixed Co2 and helium mixed Only Co2 gas

Which metal is welded with self shielded type FCAW? Low alloy steel Stainless steel Carbon steel Different metal and different position

Which combination of metal and shielding gas gives excellent cleaning action in the GMAW welding process? Copper, Argon Aluminium, Helium Magnesium, Argon Stainless steel Argon

What is the basic safety environmental condition for the welding area? Dust free Clean area No congestion Well ventilated

What is the trouble shooting with wire wrapping on drive rolls of wire feeder in GMAW? Adjust drive rolls pressure Replace drive rolls and guides Check drive rolls align properly Replace the drive motor

Which is the remedy for the contraction of weld metal due to excess heat input that moves the base metal and changes the angle? Support on solid surface with two hands Check gas flow rate and leakage of gas Use clean and dry weld wire Weld small segments and allow cooling

What is the operation to clean the cylinder valve before fixing the regulator to the argon cylinder? Closing Opening Shutting Cracking

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