1. The welding set up is said to have reversed polarity when the work is connected to the negative terminal and the electrode holder to the positive terminal.
2. The cold working of metals is carried out
3. In a __________ , both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram.
4. Cold working requires much higher pressure that hot working.
5. A pouring basin acts as a reservoir for the molten metal.
6. An oxidising process used for aluminium and magnesium articles is called
7. The operation of bending a sheet of metal along a curved axis, is known as
8. Notching is the operation of
9. In order to cut mild steel, the cutting angle of chisel should be
10. Lancing is the operation of
11. In a __________ , two or more operations are performed simultaneously at the single stroke of the ram.
12. The operation of straightening a curved sheet metal, is known as
13. For welding plates of thickness less than 5 mm, its edges
14. In bending operation, the metal takes the shape of a punch.
15. The shrinkage allowance for cast iron pattern is
16. A rip saw
17. An oxidising flame is obtained when equal volumes of oxygen and acetylene are supplied.
18. The correct sequence for preparing a billet for extrusion process is pickling, alkaline cleaning, phosphate coating and lubricating with reactive soap.
19. A neutral flame is obtained by supplying
20. Tandem drawing of wires and tubes is necessary because
Workshop Technology MCQ 5
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