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In metal cutting, use of low feeds and high cutting speeds is desired when the objective is

A. High metal removal rate

B. Dry machining

C. Use of soft cutting tool

D. Surface finish

Correct Answer :

D. Surface finish


Related Questions

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Cold working of steel is defined as working

A. At its recrystallisation temperature

B. Above its recrystallisation temperature

C. Below its recrystallisation temperature

D. At two thirds of the melting temperature of the metal

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The ductile materials, during machining, produce

A. Continuous chips

B. Discontinuous chips

C. Continuous chips with built up edge

D. Either (A) or (C)

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In _________ operation, the cutting force is maximum when the tooth begins its cut and reduces it to minimum when the tooth leaves the work.

A. Up milling

B. Down milling

C. Face milling

D. End milling

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Twist drills are made of

A. High speed steel

B. Carbon steel

C. Stainless steel

D. Either (A) or (B)

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In up-cut milling the work piece is fed

A. Against the rotating cutter

B. At angle of 60° to the cutter

C. In the direction of the cutter

D. At the right angle to the cutter

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In drilling brass, a drill with

A. Zero helix angle is used

B. Low helix angle is used

C. High helix angle is used

D. Any helix angle can be used

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Negative rakes are used for

A. Carbide tools

B. Heavy loads

C. Harder materials

D. All of these

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For fast removal of materials during grinding, a _________ grinding wheel is used.

A. Course grained

B. Fine grained

C. Medium grained

D. None of these

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In order to grind soft material

A. Coarse grained grinding wheel is used

B. Fine grained grinding wheel is used

C. Medium grained grinding wheel is used

D. Any one of these

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In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate

A. Increases continuously

B. Decreases continuously

C. Decreases, becomes stable and then increases.

D. Increases, becomes stable and then decreases.

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Dielectric is used in

A. Electrochemical machining

B. Ultrasonic machining

C. Electro discharge machining

D. Laser machining

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During normalizing process of steel, the specimen is heated

A. Between the upper and lower critical temperature and cooled in still air.

B. Above the upper critical temperature and cooled in furnace.

C. Above the upper critical temperature and cooled in still air.

D. Between the upper and lower critical temperature and cooled in furnace.

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In a planer

A. Tool is stationary and work reciprocates

B. Work is stationary and tool reciprocates

C. Tool moves over stationary work

D. Tool moves over reciprocating work

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Surface grinding is done to produce

A. Tapered surface

B. Flat surface

C. Internal cylindrical holes

D. All of these

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Slow speed of the spindle is necessary in

A. Thread cutting

B. Turning a work of larger diameter

C. Turning a hard or tough material

D. All of these

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The trade name of a nonferrous cast alloy composed of cobalt, chromium and tungsten is called

A. Ceramic

B. Stellite

C. Diamond

D. Cemented carbide

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A process of removing metal by pushing or pulling a cutting tool is called

A. Up milling

B. Down milling

C. Forming

D. Broaching

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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

A. 0.2 Joule

B. 1 Joule

C. 5 Joule

D. 1000 Joule

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The abrasive slurry used in ultrasonic machining contains fine particles of

A. Aluminium oxide

B. Boron carbide

C. Silicon carbide

D. Any one of these

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The process of changing the shape of grinding wheel as it becomes worn due to breaking away of the abrasive and bond, is called

A. Truing

B. Dressing

C. Facing

D. Clearing

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The angle made by the face of the tool and the plane parallel to the base of cutting tool is called

A. Rake angle

B. Cutting angle

C. Clearance angle

D. Lip angle

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What is the type of welding defect is caused due to stresses on heating and cooling called?

A. Incomplete penetration

B. Shrinkage void

C. Slag Entrapment (Inclusions)

D. Incomplete fusion

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In order to prevent tool from rubbing the work _________ on tools are provided.

A. Rake angles

B. Relief angles

C. Face angles

D. None of these

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Continuous chips with built up edge are formed during machining of

A. Brittle metals

B. Ductile metals

C. Hard metals

D. Soft metals

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The abrasive recommended for grinding materials of low tensile strength is

A. Silicon carbide

B. Aluminium oxide

C. Sand stone

D. Diamond

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The different spindle speeds on a lathe form

A. Arithmetical progression

B. Geometrical progression

C. Harmonical progression

D. Any one of these

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The object of caulking in a riveted joint is to make the joint

A. Free from corrosion

B. Stronger in tension

C. Free from stresses

D. Leak-proof

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Ceramic cutting tools are

A. Made by cold pressing of aluminium oxide powder

B. Available in the form of tips

C. Brittle and have low bending strength

D. All of these

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The size of abrasive grain required in a grinding wheel depends upon the

A. Amount of material to be removed

B. Hardness of material being ground

C. Finish desired

D. All of these

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What is the type of welding defect caused due to poor manipulation of weld rod or a dirty joint called?

A. Porosity

B. Undercut

C. Under fill

D. Crack