Related Questions

The specific cutting energy used for establishing the machinability of the metal depends upon its
A coefficient of friction
B micro-structure
C work hardening characteristics
D all of the mentioned
In oblique cutting of metals, the cutting edge of the tool is
A Perpendicular to the workpiece
B Perpendicular to the direction of tool travel
C Parallel to the direction of tool travel
D Inclined at an angle less than 90° to the direction of tool travel
The process which improves the machinability of steels, but lowers the hardness and tensile strength is
A Normalising
B Full annealing
C Process annealing
D Spheroidising
The factor considered for evaluation of machinability is
A Cutting forces and power consumption
B Tool life
C Type of chips and shear angle
D All of these
To improve the machinability of steel by its softening, it is subjected to
A Cold working
B Annealing
C Shot blasting
D Heating
To improve the machinability of steel, it is generally subjected to
A Spheroidising
B Tempering
C Normalising
D Annealing
The machinability of steel is improved by adding
A Nickel
B Chromium
C Nickel and chromium
D Sulphur, lead and phosphorus
The machinability of steel is increased by
A Silicon and sulphur
B Phosphorous, lead and sulphur
C Sulphur, graphite and aluminium
D Phosphorous and aluminium
The machinability of aluminium increases when _________ is added to aluminium.
A Copper
B Magnesium
C Silicon
D Lead and bismuth
The correct sequence for descending order of machinability is
A Grey cast iron, low carbon steel, wrought iron
B Low carbon steel, grey cast iron, wrought iron
C Wrought iron, low carbon steel, grey cast iron
D Wrought iron, grey cast iron, low carbon steel

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