86801. In drilling bakellite and fibrous plastics, the point angle of a drill is
86802. The shear velocity is the velocity of
86803. In centreless grinders, the regulating wheel is inclined at
86804. A grinding wheel is said to be of __________ if the abrasive grains can be easily dislodged.
86805. In drilling softer materials, the cutting speed is __________ as compared to harder materials.
86806. Which of the following statement is correct about hot machining?
86807. For turning internal tapers, the suitable method is
86808. Lathe bed is made of
86809. In metal machining, the zone where the maximum heat is generated due to the plastic deformation of metal, is called
86810. The operation of making a cone-shaped enlargement of the end of a hole is known as
86811. Internal or external threads of different pitches can be produced by
86812. In a shaper
86813. Which of the following statement is correct about EDM machining?
86814. Spot facing is an operation of smoothing and squaring the surface around a hole.
86815. A better machinable metal is one which gives
86816. The angle between the lathe centres is
86817. When the shear angle is large
86818. The correct sequence of the following parameters in order of their maximum to minimum influence on tool life is
86819. In drilling aluminium, a drill with
86820. Ceramic cutting tools are
86821. The angle between the face and flank of the single point cutting tool is known as
86822. In order to obtain a surface finish in the range of 0.75 μm to 1.25 μm , the operation used is called.
86823. Which of the following statement is correct as regard to up milling?
86824. In determining the various forces on the chip, Merchant assumed that the
86825. Stellite preserve hardness upto a temperature of
86826. Hard and tough materials like cast iron should be turned at
86827. In oblique cutting system, the cutting edge of the tool
86828. When the shear angle is small
86829. A fine grained grinding wheel is used to grind
86830. EDM machining is applied for
86831. In gear hobbing
86832. Holes are machined by push broaches only for sizing.
86833. The increase in depth of cut and feed rate __________ surface finish.
86834. A lathe with four steps on the cone pulley and with backgears will have
86835. The parameter which completely defines the chip formation in a metal cutting process is
86836. In machining cast iron, no cutting fluid is required.
86837. In machining metals, surface roughness is due to
86838. A diamond locating pin is used in jigs and fixtures because
86839. In metal machining, the zone where the heat is generated due to friction between the moving chip and the tool face, is called
86840. The drill spindles are provided with standard taper known as
86841. The operation performed on a shaper is
86842. Chemical milling operation is performed
86843. The thrust force will increase with the increase in
86844. The broaching operation in which the work moves past the stationary tool is called
86845. In transverse grinding
86846. If the grain size is __________ the tool life is better.
86847. Flank wear is due to the abrasive action of hard mis-constituents including debris from built up edge as the work material rubs the work surface.
86848. The operation of reproduction of an outline of a template on a workpiece is called face milling.
86849. The usual value of the point angle of a drill is
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