Tandem drawing of wires and tubes is necessary because
It is not possible to reduce at one stage
Annealing is needed between stages
Accuracy in dimensions is not possible otherwise
Surface finish improves after every drawing stage
Correct Answer :
B. Annealing is needed between stages
Related Questions
The operation of cutting of a flat sheet to the desired shape is called
Shearing
Piercing
Punching
Blanking
Carburising flame is used to weld
Steel, cast iron, copper, aluminium etc
Brass and bronze
Hard surfacing materials such as stellite
All of these
Thread rolling is restricted to
Ferrous materials
Ductile materials
Hard materials
None of these
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
In permanent mould casting method
Molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition
Molten metal is poured and allowed to solidify while the mould is revolving
Molten metal is forced into mould under high pressure
None of the above
The metal is subjected to mechanical working for
Refining grain size
Reducing original block into desired shape
Controlling the direction of flow lines
All of these
The adhesiveness is the property of sand due to which
It evolves a great amount of steam and other gases
The sand grains stick together
It clings to the sides of a moulding box
None of these
In order to ram the sand harder at the back of the mould and softer on the pattern face, a ________ is used.
Sand slinger
Squeezing machine
Jolt machine
Stripper plate machine
A pattern maker's shrinkage rule considers
All pattern allowances
Only shrinkage allowance
All materials to be cast
All materials of the pattern
4.Linde welding uses
Neutral flame and rightward technique
Oxidising flame and leftward technique
Neutral flame and leftward technique
Carburising flame and rightward technique
The current in electric resistance welding can be regulated by
Varying the input supply
Changing the primary turns of the transformer
Changing the secondary turns of the transformer
Any one of the above
When a pattern is made in three parts, the top part, is known as a
Drag
Cheek
Cope
None of these
Which of the following statement is wrong?
The hot chamber die casting machine is used for casting zinc, tin, lead and other low melting alloys.
The cold chamber die casting machine is used for casting aluminium, magnesium, copper base alloys and other high melting alloys.
The castings produced by centrifugal casting method have open and coarse grained structure.
All of the above
In a ________, two or more operations are performed simultaneously at the single stroke of the ram.
Simple die
Progressive die
Combination die
Compound die
The most preferred process for casting gas turbine blades is
Die casting
Shell moulding
Investment moulding
Sand casting
The maximum flame temperature occurs
At the outer cone
At the inner cone
Between the outer and inner cone
At the torch tip
The metal patterns as compared to wooden patterns require less
Shrinkage allowance
Machining allowance
Draft allowance
Distortion allowance
In die casting, machining allowance is
Small
Large
Very large
Not provided
Seam welding is a
Continuous spot welding process
Multi-spot welding process
Arc welding process
Process used for joining round bars
In ________ welding, the weld may be made either from left to right or from right to left.
Forehand
Backhand
Vertical
None of these
Scribing block is used to
Hold the round bars during marking
Check the trueness of flat surfaces
Locate the centres of round bars
Check the surface roughness
According to Indian standard specifications, 100 H6/g 5 means that.
Basic size is 100 mm
Actual size is 100 mm
Difference between the actual size and basic size is 100 mm
None of the above
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
A gimlet is a ________ tool.
Boring
Marking
Cutting
None of these
In TIG arc welding, the welding zone is shielded by an atmosphere of
Helium gas
Argon gas
Either (A) or (B)
None of these
The operation of bending a sheet of metal along a curved axis, is known as
Plunging
Notching
Slitting
Forming
In forehand welding, the weld is made
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
Loam sand is a mixture of
30% sand and 70% clay
50% sand and 50% clay
70% sand and 30% clay
90% sand and 10% clay
A ring gauge is used to
Check the diameter of shafts or studs
Test the accuracy of holes
Check the clearance between two mating surfaces
All of the above
Blanking and piercing operations can be performed simultaneously in a
Simple die
Progressive die
Compound die
Combination die