Related Questions

When the cutting edge of the tool is dull, then during machining
A Continuous chips are formed
B Discontinuous chips are formed
C Continuous chips with built-up edge are formed
D No chips are formed
In oblique cutting system, the cutting edge of the tool
A May clear the width of the workpiece
B May or may not clear the width of the workpiece
C May not clear the width of the workpiece
D Should always clear the width of the workpiece
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
In metal machining, the zone where the maximum heat is generated due to the plastic deformation of metal, is called
A Friction zone
B Work-tool contact zone
C Shear zone
D None of these
In metal cutting, use of low feeds and high cutting speeds is desired when the objective is
A High metal removal rate
B Dry machining
C Use of soft cutting tool
D Surface finish
একজন ছাত্র পরীক্ষাগারে অভিকর্ষজ ত্বরণের মান 9.88 m/sec2 নির্ণয় করন। অপর দিকে যখন সে 0.01 kg ভরের কোনো বাটখারাকে স্প্রিং নিক্তিতে ঝুলিয়ে দিল তখন 0.0980 N বল দেখাচ্ছে। তার পরীক্ষা অভিকর্ষজ ত্বরণের ত্রুটি নির্ণয় কর।(A student measured the value of acceleration due to gravity in the laboratory as 9.88 m/sec2. On the other hand, when he hanged a mass of 0.01 kg in the spring balance, then he found 0.0980 N force. Calculate the percentage of error in the measured value of the acceleration due to gravity.)
A -0.716%
B -0.102%
C 0.816%
D 0.102%
E -0.916%
Continuous chips with built up edge are formed during machining of
A brittle metals
B ductile metals
C hard metals
D soft metals
The material which on machining produces chips with built up edge is
A Brittle material
B Tough material
C Hard material
D Ductile material
Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal.
A Burning
B Intensive oxidation
C Evaporation
D None of these
A semicircular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi circular disc and horizontal surface is µ. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will
A Remain horizontal
B Slant up towards direction of pull
C Slant down towards direction of pull
D None of the above

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