WELDER IMPORTANT NIMI BASED MCQ

How the filler wire is fed in the GMAW welding process?
A. Manually
B. No feeding
C. Automatically
D. Semi automatic

Which type of electrodes are used in MAG/CO2 welding?
A. Flux coated electrodes
B. Bare wire electrode
C. Flux cored electrodes
D. Tungsten electrode

What is the range of electrode for MAG / CO2 welding?
A. 0.8 to 1.6 mm
B. 0.7 to 1.3 mm
C. 0.6 to 0.9 mm
D. 0.5 to 0.7 mm

What type of operation is generally used in GMAW?
A. Automatic
B. Semi automatic
C. Fully automatic
D. Manual method

Which heat treatment of steel increases hardness, but decreases strength and ductility?
A. Annealing
B. Hardening
C. Normalising
D. Case hardening

Which heat treatment process produces only outer surfaces of job hardened, to some depth?
A. Annealing
B. Hardening
C. Normalising
D. Case hardening

Which heat treatment process is employed to remove brittleness in a chisel?
A. Annealing
B. Hardening
C. Tempering
D. Normalising

What is the main purpose of ‘Normalising’ steel?
A. To control hardness
B. To prevent cracking
C. To make welding operation easier
D. To produce fine grain of uniform structure

Which heat treatment process, if material is softened & suitable for machining?
A. Annealing
B. Tempering
C. Normalising
D. Case hardening

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

Which heat treatment process is very similar to annealing but the job are allowed to cool in air?
A. Hardening
B. Tempering
C. Normalising
D. Case hardening

What type of test is used for vessels, tanks and pipe containing pressure?
A. Visual inspection
B. Leak or pressure test
C. Stethoscopic test
D. Magnetic particle test

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

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

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

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

What is the reason that obstructed joints cannot be welded by electron beam welding process?
A. Electron beam travel in curved line
B. Electron beam travel in different direction
C. Electron beam travel only in straight line
D. 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?
A. 6 to 8 Lpm
B. 8 to 10 Lpm
C. 10 to 12 Lpm
D. 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?
A. 93°
B. 90°
C. 85°
D. 75°

What is percentage of deposition efficiency in FCAW process?
A. 93% to 97%
B. 80% to 86%
C. 70% to 76%
D. 60% to 67%