Thermit welding is often used in
Replacing broken gear teeth
Repairing broken shears
Joining rails, truck frames and locomotive frames etc.
All of the above
Correct Answer :
D. All of the above
Related Questions
The electron beam welding can be carried out in
Open air
A shielded gas environment
Vacuum
A pressurised inert gas chamber
Thermit, used in Thermit welding, is a mixture of
Charcoal and iron oxide
Charcoal and aluminium
Iron oxide and aluminium
Charcoal, iron oxide and aluminium
The fullers are used
For finishing flat surfaces
For necking down a piece of work
For punching a hole
To finish the punched hole
The cold chisels are made by
Drawing
Rolling
Piercing
Forging
The metal patterns as compared to wooden patterns require less
Shrinkage allowance
Machining allowance
Draft allowance
Distortion allowance
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 order to deliver molten metal from pouring basin to gate, a ________ is used.
Riser
Sprue
Core
None of these
A three high rolling mill consists of three rolls placed one above the other. Which of the following statement is correct?
The upper and middle rolls rotate in the same direction whereas the bottom roll rotates in opposite direction
The upper and bottom rolls rotate in the same direction whereas the middle roll rotates in opposite direction
The bottom and middle roll rotate in the same direction
Any one of the above
The welding process used in joining mild steel shanks to high speed drills, is
Spot welding
Seam welding
Flash butt welding
Upset butt welding
When the dimension is expressed as, then the tolerance is
0.035 mm
0.025 mm
0.01 mm
0.06 mm
In order to check the clearance between two mating surfaces, a ________ gauge should be used.
Ring
Plug
Feeler
None of these
For obtaining a cup of diameter 25 mm and height 15 mm by drawing, the size of the round blank should be approximately
42 mm
44 mm
46 mm
48 mm
In order to cut mild steel, the cutting angle of chisel should be
30°
45°
50°
60°
Cast iron and steel pipes are produced by
Slush casting
Investment casting
True centrifugal casting
Die casting
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 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
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 cold working of metals is carried out
At the recrystallisation temperature
Below the recrystallisation temperature
Above the recrystallisation temperature
At any temperature
The flux commonly used in brazing is
Zinc chloride
Ammonium chloride
Rosin plus alcohol
Borax
When a pattern is made in three parts, the top part, is known as a
Drag
Cheek
Cope
None of these
A file removes the metal during
Forward stroke
Return stroke
Both forward and return strokes
None of these
Rotary swaging
Is extensively used for making bolts and rivets
Is used for reducing the diameters of round bars and a tube by rotating dies which open and close rapidly on the work
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
Acetylene gas is stored in cylinders in
Solid form
Gaseous form
Liquid form
Any one of these
In spot welding, the spacing between two spot weld should not be less than
d
1.5 d
3 d
6 d
In a _________, the molten metal is poured and allowed to solidify while the mould is revolving.
Die casting method
Slush casting method
Permanent mould casting method
Centrifugal casting method
A moving mandrel is used in
Wire drawing
Tube drawing
Metal cutting
Forging
A pattern maker's shrinkage rule considers
All pattern allowances
Only shrinkage allowance
All materials to be cast
All materials of the pattern
The centrifugal casting method, is used for casting articles of
Symmetrical shape about vertical axis
Symmetrical shape about horizontal axis
Irregular shape
Nonferrous metal only
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 shielded arc welding
Large electrode is used
Welding rod coated with slag is used
Welding rod coated with fluxing material is used
None of the above