WORKSHOP TECHNOLOGY QUIZ

Both (A) and (B)

None of these

Reversed polarity

Straight polarity

3d

1.5 d

6d

d

Drawing down

Peening

Spinning

Upsetting

20 mm/m

16 mm/m

10 mm/m

26 mm/m

Work is connected to the positive terminal and the electrode holder is earthed

Work is connected to the positive terminal and the electrode holder to the negative terminal

Work is connected to the negative terminal and the electrode holder is earthed

Work is connected to the negative terminal and the electrode holder to the positive terminal

Blanking

Piercing

Shearing

Punching

4000°C to 5000°C

6000°C to 7000°C

3000°C to 4000°C

5000°C to 6000°C

Flat surfaces

V-shaped grooves

Grooves

Key-ways

Is extensively used for making bolts and rivets

Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface

Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part

Is used for reducing the diameters of round bars and a tube by rotating dies which open and close rapidly on the work

42 mm

48 mm

46 mm

44 mm