Blanking and piercing operations can be performed simultaneously in a
Simple die
Progressive die
Compound die
Combination die
Correct Answer :
C. Compound die
Related Questions
The metal extrusion process is generally used for producing
Uniform solid sections
Uniform hollow sections
Uniform solid and hollow sections
Varying solid and hollow sections
In forehand welding, the angle between the welding torch and the work is ________ as compared to backhand welding.
Same
Less
More
None of these
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 casting defect which results in general enlargement of a casting is known as
Shift
Sand wash
Swell
Scab
The type of file used for a wood work is
Single cut file
Double cut file
Rasp cut file
Any one 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
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
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
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 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
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
During hot working of metals
Porosity of the metal is largely eliminated
Grain structure of the metal is refined
Mechanical properties are improved due to refinement of grains
All of the above
Thread rolling is restricted to
Ferrous materials
Ductile materials
Hard materials
None of these
The process extensively used for making bolts and nuts is
Hot piercing
Extrusion
Cold peening
Cold heading
The draft or taper allowance on casting is generally
1 to 2 mm/m
2 to 5 mm/m
5 to 10 mm/m
10 to 15 mm/m
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 cutting edge of a chisel should be
Hardened
Tempered
Hardened and tempered
Case hardened
The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called
Shearing
Piercing
Punching
Blanking
Which one of the following material will require the largest size of riser for the same size of casting?
Aluminium
Cast iron
Steel
Copper
For gas welding, the pressure desired at the welding torch for acetylene is
7 to 103 kN/m²
70 to 280 kN/m²
280 to 560 kN/m²
560 to 840 kN/m²
The temperature of oxy-hydrogen flame is _________ oxyacetylene flame.
Same as
Less than
More than
None of these
Lap joints are employed on plates having thickness
Less than 3 mm
5 to 10 mm
12.5 mm
Above 25 mm
Piercing is an operation of cutting
A cylindrical hole in a sheet of metal by the punch and the die
A hole (other than cylindrical) in a sheet of metal by the punch and the die
A flat sheet to the desired shape
A number of holes evenly spaced in a regular pattern on a sheet of metal
The recrystallisation temperature of steel is
400°C
600°C
800°C
None of these
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
Seam welding is a
Continuous spot welding process
Multi-spot welding process
Arc welding process
Process used for joining round bars
In TIG arc welding, the welding zone is shielded by an atmosphere of
Helium gas
Argon gas
Either (A) or (B)
None of these
In a four high rolling mill, the diameter of backing up rolls is ________ the diameter of working rolls.
Equal to
Smaller than
Larger than
None of these
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 difference between the upper limit and lower limit of a dimension is called
Nominal size
Basic size
Actual size
Tolerance