ARC and GAS WELDING

What is the Quenching media of normalising? Water spray Open air Oil bath Water bath

Which type of physical transformation takes place during arc welding process? Colour transfer Metal transfer Current transfer Heat transfer

What is the colour of acetylene gas cylinder? Red Maroon Black Peacock blue

What is the colour of oxygen gas cylinder? Red Maroon Black Peacock blue

What is the dia of medium coated MS electrode used in fillet weld lap joint with 110/120 Amps welding current? 1.0 mm 1.5 mm 2.5 mm 3.15 mm

What is the electrode angle with weld line? 70° to 80° 50° to 60° 45° to 50° 35° to 40°

Which is protecting the eyes from harmful rays of the electric arc welding? Helmet Lather apron Leather gloves Welding helmet

Which solution is used for acetylene gas connection leakage test? Kerosene Naked fire Soap water Fresh water

What is the colour of hose carrying oxygen? Red Black Maroon Peacock blue

What is the colour of hose carrying acetylene? Red Black Maroon Peacock blue

Which type of hardening used eddy current in the metal bar? Flame hardening Nitriding hardening Induction hardening Annealing hardening

Which type of hardening used for camshaft production? Annealing Carburising Normalising Induction hardening

Which one is the heat treatment process? Casting Machining Welding Annealing

Which quenching media applied in the flame hardening process? Still air Oil bath Brine solution bath Water spray

What is the purpose of hardening? Increase ductility Increase malleability Increase strength Increase brittleness

What is the purpose of annealing? Improve hardness Improve machinability Improve brittleness Improve weldability

What is the advantage of AC arc welding machine? More initial cost Freedom from arc blow More maintenance cost Unsuitable for non ferrous metal

What is the advantage of using rectifier set in arc welding machine? Suitable for all ferrous and non-ferrous Initial cost is low Maintenance cost is less No special safety precaution required

Which machine can be used anywhere in the field for welding away from electric main supply? Motor generator set Engine generator set | AC arc welding machine AC welding transformer with a rectifier

Which one of the following metals cannot be welded by AC welding machine? Brass Cast iron Mild steel High carbon steel

Which is the safety method to carry the oxy-acetylene gas cylinders? Rolling Sliding Dragging Use a trolly

Which of the following is the stage of heat treatment process? Cooling the metal Heating the metal slowly Hold at a given temperature Heat and cool the metal as soon as possible

What is the importance of case hardening? To increase softness To withstand wear resistance To withstand heavy load To decrease the brittleness

Which valve to be closed first while gas flame snaps out and backfire? Oxygen valve in cylinder Oxygen valve at blow pipe Acetylene valve in cylinder Acetylene valve at blow pipe

Which gas cutting process is suitable for all position, location and under water? Gas cutting Plasma cutting Manual cutting Machine cutting

What is the name of welding device?

Motor generator Engine generator Regulator Alternator

What is the name of edge preparation method used in welding process?

Single 'V' Butt Soldering Riveting Brazing

What is the name of oxy- acetylene gas flame?

Arc flame Neutral flame Carburising flame Oxidising flame

What is the name of the weld joint?

Double 'V' butt Double 'U' butt Single bevel butt Double J butt

Name the welding process?

Plasma arc welding Electro - slag welding Gas metal arc welding Submerged arc welding

What is the name of equipment?

Motor generator set Engine generator set DC generator machine Alternating current welding machine

What is the name of part marked as x?

Regulator Blow pipe Spark lighter None - return disc

What is the name of part marked as 'X'?

Safety plug Valve socket Valve spindle Dissolved acetylene

What is the name of process?

Annealing Carburising Normalising Case hardening

What is the name of process?

Nitriding Annealing Carburising Induction hardening

What is the name of gas flame?

Neutral flame Starting flame Oxidising flame Carburising flame

What is the name of part marked as x?

Nozzle Handle Oxygen control valve Acetylene control valve

What is the name of part marked as X?

Pilot arc Electrode Weld pool Contact tube

What is the name of welding process?

Arc welding Carbon arc welding Plasma arc welding Submerged arc welding