Workshop Technology mcq part 1

Workshop Technology mcq

1. The advantage of thermit welding is that.

all parts of the weld section are molten at the same time. weld cools almost uniformly.

results in a minimum problem with internal residual stresses.

all of the above.

Explanations: - Thermit material is a mechanical mixture of metallic aluminum and. processed iron oxide.

2. A gimlet is a

boring tool.

3. Slick is used for.

repairing and finishing the mould.

  

4. The maximum flame temperature occurs.

at the inner cone.

5. During cold working process.

grain structure is distorted.

strength and hardness of metal increases.

close dimensional tolerance can be maintained.

all of the above.

Explanations: -

major cold-working operations can be classified principally as squeezing, bending, shearing and drawing.

6. When filing soft metals, the file teeth are clogged with minute particles of metal. The file should be cleaned by.

using file card.

7. Lap joints are employed on plates having thickness.

less than 3 mm.

8. A large electrode is used in.

unshielded arc welding.

9. A process used for making thin phosphate coating on steel is called.

parkerising.

Parkerizing, bonderizing, phosphating, or phosphatizing is a method of protecting a steel surface from corrosion and increasing its resistance to wear through the application of a chemical phosphate conversion coating.

10. The recrystallisation temperature of steel is.

800° C.

11. A basic hole is one whose.

lower deviation is zero.

12. Seam welding is best adopted for metal thickness ranging from.

0.025 to 3 mm.

13. The surface to be machined is marked on the pattern by.

red colour.

14. In electric resistance welding, pressure applied varies from.

25 to 55 MPa.

15. In order to deliver molten metal from pouring basin to gate,  

a sprue is used.

  

16. A progressive limit gauge has.

'Go' and 'Not go' member on the same side of the gauge.

17. Piercing is an operation of cutting.

a hole (other than cylindrical) in a sheet of metal by the punch and the die.

18. Shift is a casting defect which.

results in a mismatching of the top and bottom parts of a casting.

19. A diamond pointed chisel is used for cutting.

V‐ shaped grooves.

20. The parts of circular cross section which are symmetrical about the axis of rotation are made by.

hot spinning.

21. In electric resistance welding,

pressure is applied just after the completion of current.

22. Scribing block is used to.

locate the centres of round bars.

  

23. Neutral flame is used to weld.

Steel.

cast iron.

Copper.

all of these.

24. Acetylene gas is stored in cylinders in.

liquid form.

25. Which one of the following material will require the largest size of riser for the same size of casting?

Steel.

26. The consumable electrode is used in.

MIG arc welding.

27. The operation of cutting a sheet of metal in a straight line along the length, is known as

Slitting.

28. A basic shaft is one whose.

upper deviation is zero.

29. A file with 20 teeth in 25 mm is called.

rough file.

30. The flux commonly used in brazing is.

Borax.

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