What is the metallurgy use? What is the casting and forging?
what is the strongest metal?
Why we are doing post heating in alloy steel welding?
What is the use of worm gears?
How is solution annealing carried out? What type of furnace is required? Does one need to be heat in a salt bath?
Explain a silver and deming drill brit?
The moment of inertia of an area is always least with respect to ?
How can you separate gold from mercury?
How much gold concentration should be in the organic phase (dbc) before reduction by oxalic acid solution?
What is the hottest part of flame in fire?
Does case harden steel properties detoriates over time? Especially for guns, parts like bolt carrier, the brand new parts has been kept for 10 year and properly oiled. I am worried about its surface hardness to take the blow during firing.
Which liquid can dissolve gold?
What is the difference between plaster used in gold investment casting and ceramic used in the process of investment casting of automobile engine parts and turbineblades etc. When both are used in the lost-wax method?
Define boring.
Which type of welding is used for welding of duplex and super duplex steel?
