The silicon carbide abrasive is chiefly used for grinding
A. Cemented carbide
B. Ceramic
C. Cast iron
D. All of these
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Relief angles on high speed steel tools usually vary from
A. 0° to 3°
B. 3° to 10°
C. 10° to 20°
D. 20° to 30°
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Which of the following statement is correct about EDM machining?
A. It can machine hardest materials
B. It produces high degree of surface finish
C. The tool and work are never in contact with each other
D. All of these
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Which of the following statement is correct about hot machining?
A. It requires less power than machining metals at room temperature.
B. The rate of tool wear is lower.
C. It is used for machining high strength and high temperature resistant materials.
D. All of the above
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With the same tool life, the maximum material per minute is removed by
A. Increasing the cutting speed
B. Decreasing the cutting speed
C. Increasing the depth of cut
D. Increasing the feed rate
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Larger than 15° side cutting edge angle
A. Increases tool life
B. Decreases tool life
C. Produces chipping and decreases tool life
D. Results in excessive stress concentration and greater heat generation
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The parameter which completely defines the chip formation in a metal cutting process is
A. Shear angle
B. Chip-tool contact length
C. Both (A) and (B)
D. None of these
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The capacity of a material to be welded under the imposed fabrication conditions into a specific, suitably designed structure and to perform satisfactorily in the intended service is known as?
A. Weldment
B. Weld tab
C. Weldability
D. Tack weld
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The tool life in case of a grinding wheel is the time
A. Between two successive regrinds of the wheel
B. Taken for the wheel to be balanced
C. Taken between two successive wheel dressings
D. Taken for a wear of 1 mm on its diameter
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A dense structure of a grinding wheel is used for
A. Hard materials
B. Brittle materials
C. Finishing cuts
D. All of these
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An open structure of a grinding wheel is used for
A. Soft materials
B. Tough materials
C. Ductile materials
D. All of these
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In hot machining, the work is heated by
A. Simple heating
B. Flame heating
C. Induction heating
D. Any one of these
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In up-cut milling the work piece is fed
A. Against the rotating cutter
B. At angle of 60° to the cutter
C. In the direction of the cutter
D. At the right angle to the cutter
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The surface finish is improved by the increase in
A. Cutting speed
B. Nose radius
C. True rake angle
D. All of these
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A right hand tool on a lathe cuts most efficiently when it travels
A. From left to right end of the lathe bed
B. From right to left end of the lathe bed
C. With the help of a compound slide
D. Across the bed
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A left hand tool on a lathe cuts most efficiently when it travels
A. From left to right end of the lathe bed
B. From right to left end of the lathe bed
C. With the help of a compound slide
D. Across the bed
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