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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

D. None of these

Correct Answer :

A. Minimum at the beginning of the cut and maximum at the end of the cut


Related Questions

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4

The maximum production of small and slender parts is done by

A. Watch maker's lathe

B. Sliding head stock automatic lathe

C. Multi-spindle automatic lathe

D. Capstan lathe

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4

The work or surface speed for cylindrical grinding varies from

A. 5 to 10 m/min

B. 10 to 20 m/min

C. 20 to 30 m/min

D. 40 to 60 m/min

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4

Side rake angle of a single point cutting tool is the angle

A. By which the face of the tool is inclined towards back

B. By which the face of the tool is inclined sideways

C. Between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of the tool

D. Between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base

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4

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

A. Up milling

B. Down milling

C. Face milling

D. End milling

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4

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

A. 0.2 mm

B. 10 mm

C. 20 mm

D. 100 mm

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4

The maximum possible draft in cold rolling of sheet increases with the

A. Increase in coefficient of friction

B. Decrease in coefficient of friction

C. Decrease in roll radius

D. Decrease in roll velocity

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4

A better machinable metal is one which gives

A. Lower chip-tool contact area and larger shear angle

B. Higher chip-tool contact area and smaller shear angle

C. Lower chip-tool contact area and smaller shear angle

D. Higher chip-tool contact area and larger shear angle

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4

Chip breakers are used to

A. Increase tool life

B. Remove chips from bed

C. Break the chips into short segments

D. To minimise heat generation

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4

In an interchangeable assembly, shafts of size 25.000 -0.010⁺⁰⁰⁴⁰ mm mate with holes of size 25.000 -0.020⁺⁰⁰³⁰, the maximum interference (in microns) in the assembly is

A. 40

B. 30

C. 20

D. 10

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4

The cutting speed for drilling aluminium, brass and bronze with carbon steel drills is _________ cutting speed for drilling mild steel with high speed steel drills.

A. Equal to

B. Less than

C. More than

D. None of these

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4

In gear hobbing

A. Only hob rotates

B. Only gear blank rotates

C. Both hob and gear blank rotates

D. Neither hob nor gear blank rotates

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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

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

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

The hole to be drilled for tapping is _________ the outside diameter of the thread on the tap.

A. Equal to

B. Smaller than

C. Greater than

D. None of these

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4

High speed steel tools retain their hardness upto a temperature of

A. 250°C

B. 350°C

C. 500°C

D. 900°C

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4

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

A. 10 to 20 m/min

B. 18 to 30 m/min

C. 24 to 45 m/min

D. 60 to 90 m/min

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4

The lathe centres are provided with standard taper known as

A. Morse taper

B. Seller's taper

C. Chapman taper

D. Brown and Sharpe taper

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4

Which of the following operations can be performed with milling cutters?

A. Cutting key ways on shafts

B. Cutting external screw threads

C. Cutting teeth of spur gears

D. All of these

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4

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

A. Perpendicular to the workpiece

B. Perpendicular to the direction of tool travel

C. Parallel to the direction of tool travel

D. Inclined at an angle less than 90° to the direction of tool travel

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4

In the relation VTn = C, the value of n for carbide tools is

A. 0.1 to 0.2

B. 0.20 to 0.25

C. 0.25 to 0.40

D. 0.40 to 0.55

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4

The method of grinding used to produce internal cylindrical holes and tapers, is

A. Internal cylindrical grinding

B. Form grinding

C. External cylindrical grinding

D. Surface grinding

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4

The binding material used in cemented carbide tools is

A. Tungsten

B. Chromium

C. Silicon

D. Cobalt

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4

The mechanism of material removal in EDM process is

A. Melting and Evaporation

B. Melting and Corrosion

C. Erosion and Cavitations

D. Cavitations and Evaporation

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4

The type of tool used on lathe, shaper and planer is

A. Single point cutting tool

B. Two point cutting tool

C. Three point cutting tool

D. Multipoint cutting tool

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4

Which of the following parameters govern the value of shear angle in continuous chip formation?

A. True feed

B. Chip thickness

C. Rake angle of the cutting tool

D. All of these

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4

In reaming process

A. Metal removal rate is high

B. High surface finish is obtained

C. High form accuracy is obtained

D. High dimensional accuracy is obtained

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4

In the relation VTn = C, the value of n for ceramic tools is

A. 0.1 to 0.2

B. 0.20 to 0.25

C. 0.25 to 0.40

D. 0.40 to 0.55

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4

The tool material, for faster machining, should have

A. Wear resistance

B. Red hardness

C. Toughness

D. All of these

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4

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

A. Gang milling

B. Straddle milling

C. String milling

D. Side milling