The cutting edge of a chisel should be
Hardened
Tempered
Hardened and tempered
Case hardened
Correct Answer :
C. Hardened and tempered
Related Questions
During drawing operation, the states of stress in cup would include
Compressive stress in the flange
Tensile stress in the wall
Both (A) and (B)
None of these
Cast iron and steel pipes are produced by
Slush casting
Investment casting
True centrifugal casting
Die casting
The property of sand due to which it evolves a great amount of steam and other gases is called
Collapsibility
Permeability
Cohesiveness
Adhesiveness
In a bilateral 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
In die casting, machining allowance is
Small
Large
Very large
Not provided
The machining allowance provided on patterns depends upon
Type of casting metal
Size and shape of casting
Method of casting used
All of these
Galvanising is a
Zinc diffusion process
Process of coating zinc by hot dipping
Process used for making thin phosphate coating on steel
None of the above
In backhand welding, the angle between the welding rod and the work is ________ as compared to forehand welding.
Same
Less
More
None of these
The maximum flame temperature occurs
At the outer cone
At the inner cone
Between the outer and inner cone
At the torch tip
The cold chisels are made by
Drawing
Rolling
Piercing
Forging
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 parts of circular cross-section which are symmetrical about the axis of rotation are made by
Hot forging
Hot spinning
Hot extrusion
Hot drawing
A neutral flame is obtained by supplying
Equal volumes of oxygen and acetylene
More volume of oxygen and less volume of acetylene
More volume of acetylene and less volume of oxygen
None of the above
The hot working of metals is carried out
At the recrystallisation temperature
Below the recrystallisation temperature
Above the recrystallisation temperature
At any temperature
In a cold 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
Low temperature and pressure is used
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
Metal patterns are used for
Small castings
Large castings
Complicated castings
Large scale production of castings
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 TIG arc welding, the welding zone is shielded by an atmosphere of
Helium gas
Argon gas
Either (A) or (B)
None of these
To prevent the body of the blade from jamming in the saw cut, the teeth of blade are
Strengthened
Sharpened
Set
All of these
Acetylene gas is stored in cylinders in
Solid form
Gaseous form
Liquid form
Any one of these
A file removes the metal during
Forward stroke
Return stroke
Both forward and return strokes
None of these
The shrinkage allowance for cast iron pattern is
10 mm/m
16 mm/m
20 mm/m
26 mm/m
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
In a hot chamber die casting machine
Ferrous alloys with low melting temperature are casted
Ferrous alloys with high melting temperature are casted
Nonferrous alloys with low melting temperature are casted
Nonferrous alloys with high melting temperature are casted
The cold working of metals is carried out
At the recrystallisation temperature
Below the recrystallisation temperature
Above the recrystallisation temperature
At any temperature
Which of the following welding process uses non-consumable electrodes?
TIG welding
MIG welding
Manual arc welding
Submerged arc welding
If an aluminium pattern made from a wooden master pattern is to be used for grey iron castings, then the shrinkage allowance allowed on the wooden pattern should be
10 mm/m
16 mm/m
20 mm/m
26 mm/m
The temperature of the inner luminous cone of neutral flame is about
1000°C
1250°C
2100°C
3200°C
The consumable electrode is used in
Carbon arc welding
Submerged arc welding
TIG arc welding
MIG arc welding