Related Questions
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4
The aluminium oxide abrasive is chiefly used for grinding
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4
Green sand mould indicates that
A. Polymeric mould has been cured
B. Mould has been totally dried
C. Mould is green in colour
D. Mould contains moisture
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4
When the tool moves parallel to the lathe axis, the movement is termed as
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If a gas metal arc process uses a low arc voltage and the arc is continuously interrupted as the molten electrode metal fills up the arc gap is known as
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4
Gears can be best produced on mass production by
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4
The rake angle required to machine brass by high speed steel tool is
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It is desired to perform the operations like drilling, reaming, counter-boring etc. on a work piece. Which of the following machine will be used?
A. Sensitive drilling machine
B. Radial drilling machine
D. Multiple spindle drilling machine
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4
Drilling is an example of
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A coarse grained grinding wheel is used to grind
A. Hard and brittle materials
B. Soft and ductile materials
C. Hard and ductile materials
D. Soft and brittle materials
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For softer materials, the point angle of the drill is kept
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What is the welding defect caused due to improper control and poor removal of slog between passes called?
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Gear lapping is an operation
B. Prior to heat treatment
C. For gear reconditioning
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The increase in depth of cut and feed rate __________ surface finish.
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Two 1 mm thick steel sheets are to be spot welded at a current of 5000 A. Assuming effective resistance to be 200 μm and current flow time of 0.2 second, heat generated during the process will be
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4
For turning small taper on long workpiece, the suitable method is
B. By setting over the tail stock
C. By a taper turning attachment
D. By swivelling the compound rest
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4
The binding material used in cemented carbide tools is
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Which of the following parameters govern the value of shear angle in continuous chip formation?
C. Rake angle of the cutting tool
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The swing diameter over the bed is ________ the height of the centre measured from the bed of the lathe.
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In a milling operation, two side milling cutters are mounted with a desired distance between them so that both sides of a workpiece can be milled simultaneously. This set up is called
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A solid cylinder of diameter 100 mm and height 50 mm is forged between two frictionless flat dies to a height of 25mm. The percentage change in diameter is
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4
If the tearing efficiency of a riveted joint is 50%, then ratio of rivet hole diameter to the pitch of rivets is
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A bottoming tap has
A. Its end tapered for about three or four threads
B. Its end tapered for about eight or ten threads
C. Full threads for the whole of its length
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The process of improving the cutting action of the grinding wheel is called
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The grooving is an operation of
A. Bevelling the extreme end of a workpiece
B. Embossing a diamond shaped pattern on the surface of a workpiece
C. Reducing the diameter of a workpiece over a very narrow surface
D. Enlarging the end of a hole cylindrically
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What is the type of welding defect caused due to poor manipulation of weld rod or a dirty joint called?
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4
In centre less grinders, the maximum angular adjustment of the regulating wheel is
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The saw milling is an operation of
A. Producing grooves around the periphery of a cylindrical or conical workpiece
B. Producing narrow slots or grooves on a workpiece
C. Reproduction of an outline of a template on a workpiece
D. Machining several surfaces of a workpiece simultaneously
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4
A dynamometer is a device used for the measurement of
B. Forces during metal cutting
C. Wear of the cutting tool
D. Deflection of the cutting tool
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In metal machining, the work-tool contact zone is a zone where heat is generated due to
A. Plastic deformation of metal
C. Friction between the moving chip and the tool face
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In orthogonal turning of a low carbon steel bar of diameter 150 mm with uncoated carbide tool, the cutting velocity is 90 m/min. The feed is 0.24 mm/rev and the depth of cut is 2mm. The chip thickness obtained is 0.48 mm. If the orthogonal rake angle is zero and the principle cutting edge angle is 90⁰, the shear angle in degree is