Related Questions
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4
The swing diameter over the bed is ________ the height of the centre measured from the bed of the lathe.
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As tool and work are not in contact in EDM process
A. No relative motion occurs between them
B. No wear of tool occurs
C. No power is consumed during metal cutting
D. No force between tool and work occurs
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4
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
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4
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
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4
In up milling, the thickness of chip is
A. Minimum at the beginning of the cut and maximum at the end of the cut
B. Maximum at the beginning of the cut and minimum at the end of the cut
C. Uniform throughout the cut
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4
In the relation VTn = C, the value of n for carbide tools is
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A CNC vertical milling machine has to cut a straight slot of 10 mm width and 2mm depth by a cutter of 10 mm diameter between points (0,0) and (100,100) on the XY plane (dimensions in mm). The feed rate used for milling is 50 mm/min, milling time for the slot (in seconds) is
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Larger than 15° side cutting edge angle
C. Produces chipping and decreases tool life
D. Results in excessive stress concentration and greater heat generation
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4
The chuck preferred for quick setting and accurate centering of a job is
A. Four jaw independent chuck
C. Three jaw universal chuck
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Down milling is also called
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As the cutting speed increases, the tool cutting forces
D. First increases and then decreases
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In a gating system, the ratio 1: 2: 4 represents
A. Sprue base area: runner area: ingate area
B. Pouring basin area: ingate area: runner area
C. Sprue base area: ingate area: casting area
D. Runner area: ingate area: casting area
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4
In a plain milling cutter, the chip space between the back of one tooth and the face of the next tooth is called
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4
The object of caulking in a riveted joint is to make the joint
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The tailstock set over required to turn a taper on the entire length of a workpiece having diameters D and d is
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The process of removing metal by a cutter which is rotated in the same direction of travel of workpiece, is called
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4
The cutting fluid mostly used for machining alloy steels is
D. Sulphurised mineral oil
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A twist drill is a
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The lathe spindles at the nose end have
A. Internal screw threads
B. External screw threads
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The rake angle of a single point cutting tool corresponds to _________ of a twist drill.
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4
Tool life is measured by the
A. Number of pieces machined between tool sharpenings
B. Time the tool is in contact with the job
C. Volume of material removed between tool sharpenings
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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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4
The obtuse angle, included between the chisel edge and the lip as viewed from the end of a drill, is called
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4
A type of welding flows, which is the result of a perfect proportion and mixture of acetylene and oxygen and is used for fusion welding of steel and cast iron, is
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What is the name of the device used in arc welding circuits for the purpose of modifying the rate of current change when the weld road is varied rapidly?
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Lathe bed is made of
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The operation of making a cone-shaped enlargement of the end of a hole is known as
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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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The lip angle of a single point tool is usually
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Which of the following arc welding processes does not use consumable electrodes?