Continuous spot welding process
Multi-spot welding process
Arc welding process
Process used for joining round bars
A. Continuous spot welding process
Simple die
Progressive die
Combination die
Compound die
Collapsibility
Permeability
Cohesiveness
Adhesiveness
Porosity of the metal is largely eliminated
Grain structure of the metal is refined
Mechanical properties are improved due to refinement of grains
All of the above
Black colour
White colour
Maroon colour
Yellow colour
Small
Large
Very large
Not provided
At the recrystallisation temperature
Below the recrystallisation temperature
Above the recrystallisation temperature
At any temperature
1800°C
2100°C
2400°C
3200°C
Cutting a sheet of metal in a straight line along the length
Removal of metal to the desired shape from the edge of a plate
Cutting a sheet of metal through part of its length and then bending the cut portion
Bending a sheet of metal along a curved axis
1 to 5 MPa
5 to 10 MPa
10 to 25 MPa
25 to 55 MPa
Straight polarity
Reversed polarity
Both (A) and (B)
None of these
Die casting method
Slush casting method
Permanent mould casting method
Centrifugal casting method
Spot welding
Seam welding
Projection welding
Upset butt welding
Bending
Stretching
Rolling and stretching
Bending and stretching
Simple die
Progressive die
Compound die
Combination die
At the same speed and in the same direction
At the same speed but in opposite direction
At different speeds and in the same direction
At different speeds and in the opposite direction
Neutral
Oxidising
Carburising
None of these
At the recrystallisation temperature
Below the recrystallisation temperature
Above the recrystallisation temperature
At any temperature
7 to 103 kN/m²
70 to 280 kN/m²
280 to 560 kN/m²
560 to 840 kN/m²
Carbon arc welding
Submerged arc welding
TIG arc welding
MIG arc welding
Drawing
Extrusion
Rolling
Extrusion and rolling
Less than 3 mm
5 to 10 mm
12.5 mm
Above 25 mm
Aluminium
Cast iron
Steel
Copper
Deliver molten metal into the mould cavity
Act as a reservoir for the molten metal
Feed the molten metal to the casting in order to compensate for the shrinkage
Deliver the molten metal from pouring basin to gate
Forehand
Backhand
Vertical
None of these
Shift
Sand wash
Swell
Scab
Galvanising
Anodising
Parkerising
Sherardizing
Cross filing
Draw filing
Pull and push filing
None of these
From left to right
From right to left
First from left to right and then from right to left
Either from left to right or from right to left
Hot forging
Hot spinning
Hot extrusion
Hot drawing
Slush casting
Investment casting
True centrifugal casting
Die casting