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4

The specific cutting energy used for establishing the machinability of the metal depends upon its

A. Coefficient of friction

B. Microstructure

C. Work hardening characteristics

D. All of these

Correct Answer :

D. All of these


Related Questions

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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

A. 0.20

B. 0.30

C. 0.50

D. 0.60

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4

An important geometrical quantity in the cutting of metals which can be used as a criterion for machinability of metals is

A. Cutting speed

B. Feed rate

C. Shear angle

D. Tool geometry

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4

In ECM, the material removal is due to

A. Corrosion

B. Erosion

C. Fusion

D. Ion displacement

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4

In a plain milling machine, the table can be moved

A. Longitudinally

B. Crosswise

C. Vertically

D. All of these

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4

When two main plates are kept in alignment butting each other and riveted with cover plate on both sides of the main plates with two rows of rivets in each main plate, the joint is known as _______ double cover butt joint.

A. Single riveted

B. Double riveted

C. Both (A) and (B)

D. None of these

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4

The angle between the shear plane and __________ is called shear angle.

A. Work surface

B. Tool face

C. Machine surface

D. None of these

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4

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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4

If the cutting speed is increased, then the built-up-edge

A. Becomes longer

B. May or may not form

C. Becomes smaller and finally does not form at all

D. Has nothing to do with speed

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4

The angle between the face and flank of the single point cutting tool is known as

A. Rake angle

B. Clearance angle

C. Lip angle

D. Point angle

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4

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

A. Electrochemical machining

B. Electro-discharge machining

C. Ultrasonic machining

D. None of these

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4

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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4

Gear lapping is an operation

A. After heat treatment

B. Prior to heat treatment

C. For gear reconditioning

D. None of these

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4

A ring gauge is used to measure

A. Outside diameter but not roundness

B. Roundness but not outside diameter

C. Both outside diameter and roundness

D. Only external threads

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4

The purpose of jigs and fixtures is to

A. Increase machining accuracy

B. Facilitate interchangeability

C. Decrease expenditure on quality control

D. All of these

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4

A broach has

A. Roughing teeth

B. Semi-finishing teeth

C. Finishing teeth

D. All of these

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4

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

During the execution of a CNC part program block NO20 GO2 X45.0 Y25.0 R5.0 ; the type of tool motion will be

A. Circular Interpolation − clockwise

B. Circular Interpolation − counter clockwise

C. Linear Interpolation

D. Rapid feed

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4

The type of reamer used for reaming operation in a blind hole, is

A. Straight fluted reamer

B. Left hand spiral fluted reamer

C. Right hand spiral fluted reamer

D. Any one of these

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4

For generating a Coons surface we require

A. A set of grid points on the surface

B. A set of grid control points

C. Four bounding curves defining the surface

D. Two bounding curves and a set of grid control points

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4

The ratio between two consecutive spindle speeds for a six-speed drilling machine using drills of diameter 6.25 to 25 mm size and at a cutting velocity of 18 m/min is

A. 1.02

B. 1.32

C. 1.66

D. 1.82

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4

If a particular Fe-C alloy contains less than 0.83% carbon, it is called

A. High speed steel

B. Hypo eutectoid steel

C. Hyper eutectoid steel

D. Cast iron

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4

In transverse grinding

A. The work is reciprocated as the wheel feeds to produce cylinders longer than the width of wheel face

B. The work rotates in a fixed position as the wheel feeds to produce cylinders equal to or shorter than the width of wheel face

C. The work is reciprocated as the wheel feeds to produce cylinders shorter than the width of wheel face

D. The work rotates in a fixed position as the wheel feeds to produce cylinders longer than the width of wheel face

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4

In metal machining, the zone where the heat is generated due to friction between the moving chip and the tool face, is called

A. Friction zone

B. Work-tool contact zone

C. Shear zone

D. None of these

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4

The height of each tooth of a broach is

A. Same throughout

B. In progressively decreasing order

C. In progressively increasing order

D. None of these

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4

For turning internal tapers, the suitable method is

A. By a form tool

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 negative rake is usually provided on

A. High carbon steel tools

B. High speed steel tools

C. Cemented carbide tools

D. All of these

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4

Which one of the following is a solid state joining process?

A. Gas tungsten arc welding

B. Resistance spot welding

C. Friction welding

D. Submerged arc welding

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4

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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4

Which of the following statement is correct regarding grinding of high carbon steel?

A. Grinding at high speed results in the reduction of chip thickness and cutting forces per grit.

B. Aluminium oxide wheels are employed.

C. The grinding wheel has to be of open structure.

D. All of the above

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4

The hardness of a grinding wheel is specified by

A. Brinell hardness number

B. Rockwell hardness number

C. Vickers pyramid number

D. Letter of alphabet