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Mechanical Engineering Objective Questions { Production Technology }

610. For particular cutting speed, the tool materials in order of tool life are
A.H.S.S., cemented carbides, ceramics and oxides
B.Ceramics and oxides, cemented carbides, H.S.S.
C.H.S.S., ceramics and oxides, cemented carbides
D.Cemented carbides, ceramics and oxides, H.S.S.
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611. Tool cutting forces, with increase in cutting speed
A.More or less remain constant
B.Increase linearly
C.Decrease linearly
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612. The cutting speed for milling cast iron with HSS milling cutter is of the order of
A.5-10 m/min
B.10-16 m/min
C.20-30 m/min
D.50-100 m/min
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613. End relief angle of a single point tool is the angle
A.By which the face of the tool is inclined sideways
B.By which the face of the face Is inclined towards back
C.Between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base
D.Between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of the tool
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614. The strength of a cutting tool depends on following angle
A.Lip angle
B.Clearance angle
C.Rake angle
D.Cutting angle
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615. Chips are broken effectively due to following property
D.Work hardening of work material
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616. A burr is
A.Short piece of hardened chip
B.Burnt sand
C.Rough surface on welded joint adhering to casting
D.Sharp edge remaining on metal after cutting, stamping or machining
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