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Doctors Medicines MCQs Q&A

  1. Gas welding
  2. Friction stir welding
  3. Arc welding
  4. Resistance welding
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1 Answers

Option 2 : Friction stir welding

Explanation:

Welding:

  • Welding is a metal joining process in which two or more parts are joined or coalesced at their contacting surfaces by suitable application of heat or/and pressure.

Welding processes can be broadly classified into

  • Pressure welding/solid-state welding
  • Fusion welding

 

Solid-state welding:

  • In solid-state welding, the joining of materials is performed with the help of heat and pressure or pressure alone.
  • Types: Forge welding, Ultrasonic welding, Explosive welding, Friction welding.

 

Fusion Welding:

  • In fusion-welding processes, heat is applied to melt the base metals.
  • In many fusion welding processes, a filler metal is added to the molten pool during welding to facilitate the process and provide strength to the welded joint.
  • Types: Arc welding, Gas welding, Oxyfuel gas welding, electron beam welding, laser welding.
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Related Questions

In the following question, the 1st and the last part of the sentence/passage are numbered 1 and 6. The rest of the sentence/ passage is split into four parts and named P, Q, R and S. These four parts are not given in their proper order. Read the sentence/ passage and find out which of the four combinations is correct. 1. Jupiter has 2.5 times more mass than all the other planets of the solar system combined and is 11 times as large as Earth in diameter. P. Jupiter is so large that scientists believe it almost became a star: as the gases and dust contracted to the form the planet, Q. But there was not enough mass available to create the temperature needed to start a fusion reaction such as that of the Sun. R. Thus, Jupiter has been cooling down ever since.  S. gravitational forces created tremendous pressure and the temperature inside the core—as high as tens of thousands of degrees. 6. Even so, Jupiter radiates about as much heat as it receives from the Sun.?
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