The recrystallisation temperature of steel is
400°C
600°C
800°C
None of these
Correct Answer :
C. 800°C
Related Questions
The electrode tip diameter (d) in spot welding should be equal to (where t = Thickness of plate to be welded)
t
1.5 t
3 t
6 t
A jolt machine is used to
Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
Ram the sand harder at the back of the mould and softer on the pattern face
Produce uniform sand hardness throughout the mould
Produce uniform packing of sand in the mould
In backhand welding, the angle between the welding torch and the work is kept as
30°-40°
40°-50°
50°-60°
60°-70°
During cold working process
Grain structure is distorted
Strength and hardness of metal increases
Close dimensional tolerance can be maintained
All of the above
An oxidising process used for aluminium and magnesium articles is called
Galvanising
Anodising
Parkerising
Sherardizing
In order to get uniform thickness of the plate by rolling process, one provides
Camber on the rolls
Offset on the rolls
Hardening of the rolls
Antifriction bearings
A basic hole is one whose
Lower deviation is zero
Upper deviation is zero
Lower and upper deviations are zero
None of these
In forehand welding, the angle between the welding rod and the work is kept as
30°-40°
40°-50°
50°-60°
60°-70°
In a unilateral system of tolerance, the tolerance is allowed on
One side of the actual size
One side of the nominal size
Both sides of the actual size
Both sides of the nominal size
When the molten metal is fed in the cavity of a metallic mould by gravity, the method of casting is known as
Die casting method
Slush casting method
Permanent mould casting method
Centrifugal casting method
The teeth of hacksaw blade are bent
Towards right
Towards left
Alternately towards right and left and every third or fourth left straight
May be bent in any direction
In a compound die
Only one operation is performed at each stroke of the ram
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
A file removes the metal during
Forward stroke
Return stroke
Both forward and return strokes
None of these
A hacksaw blade cuts on the
Forward stroke
Return stroke
Both forward and return strokes
Cutting depends upon the direction of force
The operation of straightening a curved sheet metal, is known as
Drawing
Squeezing
Coining
Planishing
The operation of cutting of a flat sheet to the desired shape is called
Shearing
Piercing
Punching
Blanking
For arc welding
Alternating current with high frequency is used
Alternating current with low frequency is used
Direct current is used
Any one of these
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 oxyacetylene gas used in gas welding produce a flame temperature of
1800°C
2100°C
2400°C
3200°C
The tolerance produced by shell moulding process of casting is
+0.05 mm
±0.2 mm
+0.5 mm
±1 mm
A mortise gauge is a
Striking tool
Planing tool
Boring tool
Marking tool
Acetylene gas is stored in cylinders in
Solid form
Gaseous form
Liquid form
Any one of these
The electrodes used in spot welding have a tip of
Stainless steel
Aluminium
Copper
Brass
The binder commonly used in making oil sand, is
Clay type binder
Organic type binder
Inorganic type binder
Any one of these
The upsetting is a process of
Increasing the cross-section of a bar
Reducing the cross-section of a bar
Joining the two surfaces of metal under pressure after heating
Bending of a bar
In a centrifugal casting method
Core is made of sand
Core is made of ferrous metal
Core is made of nonferrous metal
No core is used
The algebraic difference between the maximum limit and the basic size is called
Actual deviation
Upper deviation
Lower deviation
Fundamental deviation
The electron beam welding can be carried out in
Open air
A shielded gas environment
Vacuum
A pressurised inert gas chamber
In order to cut mild steel, the cutting angle of chisel should be
30°
45°
50°
60°
A basic shaft is one whose
Lower deviation is zero
Upper deviation is zero
Lower and upper deviations are zero
None of these