Technician A says that a soldering gun must be energized for several minutes before it warms up to the melting point of solder. Technician B says that a soldering torch is heated by burning butane gas. Who is right

sketch and explain the soldification process of welding

26. When gunpowder burns, it creates a significant amount of superheated gas. The high pressure of the hot gas behind the bullet forces it out of the barrel of the gun.*1 pointBoyle's LawCharles' LawGay-Lussac's LawAvogadro's Law

You should apply solder onto the soldering iron tip first, then touch the soldering iron to the component prong.TRUEFALSE

22The normal working time of hot melt glue is:10 seconds20 seconds30 seconds

Which of the following is not true for Thermit Welding.*a) It is a welding process for joining two electrical conductor, that employs superheated copper alloy to permanently join the conductors.b) When molten, the flux becomes conductive, and provides a current path between the electrode and the work.c) The process employs an exothermic reaction of a copper thermite composition to heat the copper, and requires no external source of heat or current.d) The reactants are usually supplied in the form of powders, with the reaction triggered using a spark from a flint lighter