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You Are On Multi Choice Question Bank SET 1471

73551. Fixtures are used

73552. In ultra-sonic machining, tool is made of

73553. Ceramic tools has greater tool life than carbide tools.

73554. The rake angle of a single point cutting tool corresponds to __________ of a twist drill.

73555. A tool used to withdraw a drill from the sleeve is called

73556. The cutting fluid mostly used for machining steel is

73557. The lip angle is the angle

73558. Small nose radius

73559. The operation of producing grooves around the periphery of a cylindrical or conical workpiece is called

73560. As the cutting speed increases, the tool cutting forces

73561. Crater wear leads to

73562. The addition of lead, sulphur and phosphorus to low carbon steels, help to

73563. The relation between the tool life (T) in minutes and cutting speed (V) in m/min is (where n = An exponent, which depends upon the tool and workpiece, and C = A constant)

73564. The width of cutting edge of a parting-off tool varies from

73565. The grinding of long, slender shafts or bars is usually done by

73566. In centreless grinding, work place centre will be

73567. Tool life is measured by the

73568. Soft materials can not be economically ground due to

73569. The process of removing metal by a cutter which is rotated in the same direction of travel of workpiece, is called

73570. 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

73571. The tool life in case of a grinding wheel is the time

73572. In which of the following machine, the work is usually rotated while the drill is fed into work?

73573. In twist fluted drills, chips do not move out automatically.

73574. Mild steel during machining produces __________ chips.

73575. Crater wear is mainly due to the phenomenon known as

73576. The cutting speed for drilling aluminium, brass and bronze with high speed steel drills varies from

73577. Flank wear depends upon the

73578. The tool may fail due to

73579. The operation of machining several surfaces of a workpiece simultaneously is called

73580. The grinding wheel speed (surface speed in m/min) usually varies from

73581. The factor considered for evaluation of machinability is

73582. In oblique cutting system, the tool may or may not generate a surface parallel to the workface.

73583. The plunge grinding requires very __________ speed.

73584. In conventional milling, the cutting force tends to lift the work.

73585. In machining metal, cutting force at the cutting edge is measured by a

73586. With the same tool life, the maximum material per minute is removed by

73587. The process of removing metal by a cutter which is rotated against the direction of travel of workpiece, is called

73588. A feed gear box for a screw cutting lathe is designed on the basis of

73589. In American Standard Association (A S A) system, if the tool nomenclature is 8-6-5-5-10-15-2 mm, then the side rake angle will be

73590. The abrasive recommended for grinding materials of low tensile strength is

73591. The chamfering is an operation of

73592. The hard grade grinding wheels are denoted by the letters

73593. The tailstock set over required to turn a taper on the entire length of a workpiece having diameters D and d is

73594. The angle formed by the leading edge of the land with a plane having the axis of the drill, is called

73595. The lip clearance angle should decrease towards the centre of the drill than at the circumference.

73596. If the shear angle is large and the chip-tool contact area is low, then the tool life will be more.

73597. In drilling brass, a drill with

73598. The carbide tools operating at very low cutting speeds (below 30 m/min)

73599. In oblique cutting of metals, the cutting edge of the tool is

73600. A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through-hole in a mild steel plate 20 mm thickness. The depth of cut in this drilling operation is

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