Q. Tool life is generally better when

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Q. When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as

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Q. Cemented carbide tools are generally poor in shear.

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Q. Which of the following statement is wrong as regard to down milling?

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Q. In reaming process

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Q. 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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Q. In which of the following machine, the work rotates and the tool is stationary?

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Q. The cutting fluid mostly used for machining alloy steels is

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Q. The cutting speed is zero at the periphery and it is maximum at the centre of the drill.

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Q. In metal cutting operations, chips are formed due to plastic deformation of the metal.

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Q. The cutting force in down milling is maximum when the tooth begins its cut and reduces to minimum when the tooth leaves the work.

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Q. The ductile materials, during machining, produce

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Q. Slow speed of the spindle is necessary in

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Q. The hole drilled for tapping should be smaller than the tap size by twice the depth of thread.

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Q. Relief angles on high speed steel tools usually vary from

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Q. It is required to cut screw threads of 2 mm pitch on a lathe. The lead screw has a pitch of 6 mm. If the spindle speed is 60 r.p.m., then the speed of lead screw will be

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Q. The tool life in case of a grinding wheel is the time

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Q. In which of the following machine, the work is usually rotated while the drill is fed into work?

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Q. In twist fluted drills, chips do not move out automatically.

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Q. Mild steel during machining produces __________ chips.

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