Dear candidates you will find MCQ questions of Manufacturing Technology here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Explanation: the thermite process is a chemical reaction in which a metal oxide (preferably molten) is displaced by another molten metal which is more reactive than the metal in the metal oxide, releasing a lot of heat. example:
Explanation: a consumable electrode can be used by the submerged arc welding which is a loop of bare round wire with 1.5 mm to 10 mm diameter. it can be fed routinely throughout the welding gun, and the submerged arc welding electrode composition depends on the welded material.
Explanation: in the tig welding process the arc is formed between a pointed tungsten electrode and the workpiece in an inert atmosphere of argon or helium.
Explanation: as the weldability of cast iron usually decreases as the amount of free carbon in cast iron increases, so it is preheated to a dull red and then welded.
Explanation: gas welding is also known as oxy fuel gas welding. in gas welding, fuel gases are used to generate high amount of heat and melt the metal.
Explanation: there are three basic flame types: neutral (balanced), excess acetylene (carburizing), and excess oxygen (oxidizing) as shown below.
Explanation: oxidizing welding flames are produced when slightly more than one volume of oxygen is mixed with one volume of acetylene. oxidizing welding flames are commonly used to weld zinc, copper, manganese steel, cast iron, etc.
Explanation: the carburizing flame has excess acetylene then oxygen. reducing flame is used for the welding of low carbon and alloy steel.
Explanation: for brazing, soldering and flame hardening carburizing flame is used.
Explanation: the inner cone of the flame has the highest temperature (3500°c). the outer flame has the lowest temperature.
Jump to