The mode of deformation of the metal during spinning is
Bending
Stretching
Rolling and stretching
Bending and stretching
Correct Answer :
D. Bending and stretching
Related Questions
The difference between the upper limit and lower limit of a dimension is called
Nominal size
Basic size
Actual size
Tolerance
The purpose of a gate is to
Delivers 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
Delivers molten metal from pouring basin to gate
A two high rolling mill consists of two rolls which rotate
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
In backhand welding, the angle between the welding rod and the work is ________ as compared to forehand welding.
Same
Less
More
None of these
A gimlet is a ________ tool.
Boring
Marking
Cutting
None of these
In forehand welding, the angle between the welding torch and the work is ________ as compared to backhand welding.
Same
Less
More
None of these
Spot welding is used for welding
Lap joints in plates having 0.025 mm to 1.25 mm thickness
Lap joints in plates having thickness above 3 mm
Butt joints in plates having 0.025 mm to 1.25 mm thickness
Butt joints in plates having thickness above 3 mm
The fullers are used
For finishing flat surfaces
For necking down a piece of work
For punching a hole
To finish the punched hole
Cast iron and steel pipes are produced by
Slush casting
Investment casting
True centrifugal casting
Die casting
In spot welding, the distance between the nearest edge of the plate and centre of weld should be equal to
d
1.5d
3d
6d
In a hot chamber die casting machine
Melting pot is separate from the machine
Melting pot is an integral part of the machine
Melting pot may have any location
High temperature and pressure is used
The welding process used in joining mild steel shanks to high speed drills, is
Spot welding
Seam welding
Flash butt welding
Upset butt welding
Seam welding is a
Continuous spot welding process
Multi-spot welding process
Arc welding process
Process used for joining round bars
Sand wash is a casting defect which
Results in a mismatching of the top and bottom parts of a casting
Results in general enlargement of the casting
Occurs near the ingates as rough lumps on the surface of a casting
Occurs as sand patches on the upper surface of a casting
For cutting brass, the hacksaw blade should have __________ teeth per 25 mm.
14
24
32
40
The operation of bending a sheet of metal along a curved axis, is known as
Plunging
Notching
Slitting
Forming
The process extensively used for making bolts and nuts is
Hot piercing
Extrusion
Cold peening
Cold heading
Blanking and piercing operations can be performed simultaneously in a
Simple die
Progressive die
Compound die
Combination die
In order to cut mild steel, the cutting angle of chisel should be
30°
45°
50°
60°
In a simple die
Two or more operations are performed simultaneously at the single stroke of the ram
Two or more cutting operations are performed at one station of the press in every stroke of the ram
Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram
None of the above
In a cold chamber die casting machine, only nonferrous alloys with _________ are casted.
Low melting temperature
High melting temperature
Both (A) and (B)
None of these
In arc welding, the temperature of heat produced by the electric arc is of the order of
3000°C to 4000°C
4000°C to 5000°C
5000°C to 6000°C
6000°C to 7000°C
The oxyacetylene gas used in gas welding produce a flame temperature of
1800°C
2100°C
2400°C
3200°C
In submerged arc welding, an arc is produced between a
Carbon electrode and the work
Metal electrode and the work
Bare metal electrode and the work
Two tungsten electrodes and the work
The electrodes used in spot welding have a tip of
Stainless steel
Aluminium
Copper
Brass
When a hole or cavity to be cored is not in line with the parting surface, then a ________ is used.
Horizontal core
Vertical core
Drop core
Balanced core
The chisel used for cutting key ways is
Flat chisel
Cape chisel
Round nose chisel
Diamond pointed chisel
The welding process used to join the ends of two pipes of uniform cross-section, is
Spot welding
Seam welding
Projection welding
Upset butt welding
The blank diameter used in thread rolling will be
Equal to minor diameter of the thread
Equal to pitch diameter of the thread
A little larger than the minor diameter of the thread
A little larger than the pitch diameter of the thread
The tolerance produced by shell moulding process of casting is
+0.05 mm
±0.2 mm
+0.5 mm
±1 mm