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4

In a centre lathe, the cutting tool is fed in _________ with reference to the lathe axis.

A. Cross direction only

B. Longitudinal direction only

C. Both cross and longitudinal direction

D. Any direction

Correct Answer :

C. Both cross and longitudinal direction


Related Questions

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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

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4

Hardness of green sand mould increases with

A. Increase in moisture content beyond 6 percent

B. Increase in permeability

C. Decrease in permeability

D. Increase in both moisture content and permeability

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4

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

A. Vertical boring machine

B. Horizontal boring machine

C. Precision boring machine

D. Jig boring machine

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4

When the shear angle is large

A. Path of shear is short and chip is thin

B. Path of shear is large and chip is thick

C. Path of shear is short and chip is thick

D. Path of shear is large and chip is thin

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4

Tool life is measured by the

A. Number of pieces machined between tool sharpenings

B. Time the tool is in contact with the job

C. Volume of material removed between tool sharpenings

D. All of the above

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A dense structure of a grinding wheel is used for

A. Hard materials

B. Brittle materials

C. Finishing cuts

D. All of these

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4

Thread grinding requires work speed from

A. 1 to 3 m/min

B. 5 to 10 m/min

C. 10 to 14 m/min

D. 14 to 20 m/min

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4

In hot machining, tool is made of

A. Tungsten carbide

B. Brass or copper

C. Diamond

D. Stainless steel

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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

Which of the following statement is wrong?

A. The diamond is the hardest tool material and can run at cutting speeds about 50 times that of high speed steel tool.

B. The ceramic tools can be used at cutting speeds 40 times that of high speed steel tools.

C. The cemented carbide tools can be used at cutting speeds 10 times that of high speed steel tools.

D. The ceramic tools can withstand temperature upto 600°C only.

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4

In metal cutting operations, the shear angle is the angle made by the shear plane with the

A. Direction of the tool axis

B. Direction of tool travel

C. Perpendicular to the direction of the tool axis

D. Central plane of the workpiece

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4

Fixtures are used

A. For holding and guiding the tool in drilling, reaming or tapping operations

B. For holding the work in milling, grinding, planing or turning operations

C. To check the accuracy of workpiece

D. None of the above

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4

What is the method of brazing used to join relatively small assemblies made from materials that either do not oxidize at the brazing temperature or can be protected from oxidation with a flux?

A. Torch brazing

B. Dip brazing

C. Resistance brazing

D. Furnace brazing

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4

For softer materials, the point angle of the drill is kept

A. Equal to 118°

B. Less than 118°

C. More than 118°

D. Any one of these

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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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The material which on machining produces chips with built up edge is

A. Brittle material

B. Tough material

C. Hard material

D. Ductile material

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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

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 material property which depends only on the basic crystal structure is

A. Fatigue strength

B. Work hardening

C. Fracture strength

D. Elastic constant

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4

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

A. Reduces tool life

B. Increases tool life

C. Have no effect on tool life

D. Spoils the work piece

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4

A twist drill is a

A. Side cutting tool

B. Front cutting tool

C. End cutting tool

D. None of these

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4

A CNC vertical milling machine has to cut a straight slot of 10 mm width and 2mm depth by a cutter of 10 mm diameter between points (0,0) and (100,100) on the XY plane (dimensions in mm). The feed rate used for milling is 50 mm/min, milling time for the slot (in seconds) is

A. 120

B. 170

C. 180

D. 240

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4

The cutting angle of a flat drill varies from

A. 3° to 8°

B. 20° to 30°

C. 60° to 90°

D. 90° to 120°

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4

In hot machining, the work is heated by

A. Simple heating

B. Flame heating

C. Induction heating

D. Any one of these

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4

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

A. Reduce built up edge

B. Break up chips

C. Improve machinability

D. All of these

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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

A single point thread cutting tool should ideally hav

A. Zero rake angle

B. Positive rake angle

C. Negative rake angle

D. Point angle

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4

A mandrel is used to hold

A. An eccentric work

B. A heavy work

C. A thin work

D. None of these

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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

If the diameter of the hole is subject to considerable variation, then for locating in jigs and fixtures, the pressure type of locator used is

A. Conical locator

B. Cylindrical locator

C. Diamond pin locator

D. Vee locator