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4

The main purpose of a boring operation, as compared to drilling, is to

A. Drill a hole

B. Finish the drilled hole

C. Correct the hole

D. Enlarge the existing hole

Correct Answer :

D. Enlarge the existing hole


Related Questions

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4

The stroke of a shaping machine is 250 mm. It makes 30 double strokes per minute. The overall average speed of operation is

A. 3.75 m/min

B. 5 m/min

C. 7.5 m/min

D. 15 m/min

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4

The grinding operation is a

A. Shaping operation

B. Forming operation

C. Surface finishing operation

D. Dressing operation

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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 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

While cutting helical gears on a non-differential gear hobber, the feed change gear ratio is

A. Independent of index change gear ratio

B. Dependent on speed change gear ratio

C. Interrelated to index change gear ratio

D. Independent of speed and index change gear ratio

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4

In a single point tool, the angle between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base, is known as

A. Side relief angle

B. End relief angle

C. Back rake angle

D. Side rake angle

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4

The facing is an operation of

A. Bevelling the extreme end of a workpiece

B. Embossing a diamond shaped pattern on the surface of a workpiece

C. Reducing the diameter of a workpiece over a very narrow surface

D. Machining the ends of a workpiece to produce a flat surface square with the axis

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4

The velocity of tool along the tool face is known as

A. Shear velocity

B. Chip velocity

C. Cutting velocity

D. Mean velocity

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4

For machining a mild steel workpiece using carbide tool, the maximum material will be removed at a temperature of

A. 50°C

B. 100°C

C. 175°C

D. 275°C

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4

The process of removing metal by a cutter which is rotated against the 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 jig is defined as a device which

A. Holds and locates a workpiece and guides and controls one or more cutting tools

B. Holds and locates a workpiece during an inspection or for a manufacturing operation

C. Is used to check the accuracy of workpiece

D. All of the above

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4

High speed steel drills can be operated at about _________ the speed of high carbon steel drills.

A. One-half

B. One-fourth

C. Double

D. Four times

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4

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

A 15 mm drilling machine means that it can drill a hole

A. Of maximum diameter 15 mm

B. In 15 mm thick plates

C. Having cross-sectional area of 15 mm²

D. None of these

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4

Cast iron during machining produces

A. Continuous chips

B. Discontinuous chips

C. Continuous chips with built-up edge

D. None of these

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4

The operation performed on a shaper is

A. Machining horizontal surface

B. Machining vertical surface

C. Machining angular surface

D. All of these

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4

Tumbler gears in lathe are used to

A. Reduce the spindle speed

B. Cut gears

C. Give desired direction of movement to the lathe carriage

D. Drill a workpiece

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4

The effect of setting a boring tool above centre height leads to

A. Increase in the effective rake angle and a decrease in the effective clearance angle

B. Increase in both effective rake angle and effective clearance angle

C. Decrease in the effective rake angle and an increase in the effective clearance angle

D. Decrease in both effective rake angle and effective clearance angle

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4

Relief angles on high speed steel tools usually vary from

A. 0° to 3°

B. 3° to 10°

C. 10° to 20°

D. 20° to 30°

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4

A set of eight form relieved milling cutters for each module is provided to enable cutting of gears of different

A. Materials

B. Types of gears

C. Number of teeth

D. Width of gears

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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 oblique cutting system, the maximum chip thickness

A. Occurs at the middle

B. May not occur at the middle

C. Depends upon the material of the tool

D. Depends upon the geometry of the tool

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4

In plunge 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 a plain milling cutter, the chip space between the back of one tooth and the face of the next tooth is called

A. Face

B. Fillet

C. Gash

D. Land

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4

The operation in which oil is permeated into the pores of a powder metallurgy product is known as

A. Mixing

B. Sintering

C. Impregnation

D. Infiltration

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4

What is the type of welding defect caused due to poor deposition of weld rod is called?

A. Porosity

B. Undercut

C. Under fill

D. Crack

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4

Which of the following statement is correct about nose radius?

A. It improves tool life

B. It improves the surface finish

C. Both (A) and (B)

D. None of these

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4

Chemical milling operation is performed

A. On universal milling machine

B. On plain milling machine

C. In a tank containing an etching solution

D. Any one of these

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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

Buffing wheels are made of

A. Softer metals

B. Cotton fabric

C. Carbon

D. Graphite