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4

As the cutting speed increases, the tool cutting forces

A. Remain constant

B. Increases

C. Decreases

D. First increases and then decreases

Correct Answer :

C. Decreases


Related Questions

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4

The tool life is said to be over if

A. Poor surface finish is obtained

B. There is sudden increase in cutting forces and power consumption

C. Overheating and fuming due to heat of friction starts

D. All of the above

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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 shear velocity is the velocity of

A. Tool relative to the workpiece

B. Chip relative to the tool

C. Tool along the tool face

D. None of these

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4

The operation of making a cone-shaped enlargement of the end of a hole is known as

A. Counter-sinking

B. Counter-boring

C. Trepanning

D. Spot facing

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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

An operation of embossing a diamond shaped pattern on the surface of a workpiece, is known as

A. Counter-boring

B. Grooving

C. Knurling

D. Facing

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4

The type of reamer used for reaming soft aluminium or copper, 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

Match the following metal forming processes with their associated stresses in the work piece.
Metal forming processTypes of stress
1. CoiningP. Tensile
2. Wire DrawingQ. Shear
3. BlankingR. Tensile and compressive
4. Deep DrawingS. Compressive

A. 1-S, 2-P, 3-Q, 4-R

B. 1-S, 2-P, 3-R, 4-Q

C. 1-P, 2-Q, 3-S, 4-R

D. 1-P, 2-R, 3-Q, 4-S

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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

In machining metals, chips break due to __________ of work material.

A. Toughness

B. Ductility

C. Elasticity

D. Work hardening

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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

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

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

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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4

The method of grinding used to produce a straight or tapered surface on a workpiece, is

A. Internal cylindrical grinding

B. Form grinding

C. External cylindrical grinding

D. Surface grinding

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4

In order to have interference fit, it is essential that the lower limit of the shaft should be

A. Greater than the upper limit of the hole

B. Lesser than the upper limit of the hole

C. Greater than the lower limit of the hole

D. Lesser than the lower limit of the hole

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4

Any number of equal divisions can be obtained on milling machine by

A. Direct indexing

B. Simple indexing

C. Compound indexing

D. Differential indexing

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4

In electro-discharge machining, dielectric is used to

A. Help in the movement of the sparks

B. Control the spark discharges

C. Act as coolant

D. All of these

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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

Climb milling is chosen while machining because

A. The chip thickness increase gradually

B. It enables the cutter to dig in and start the cut

C. The specific power consumption is reduced

D. Better surface finish can be obtained

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4

Crack in grinding wheel is developed due to

A. High temperature developed at the contact of the wheel face and work

B. Grinding hard work

C. Low speed of wheel

D. High speed of wheel

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4

What is the type of welding defect caused due to shrinkage during solidification and by weld stresses called?

A. Incomplete fusion

B. Lamellar tearing

C. Mismatch

D. Shrinkage void

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4

When the end of a tap is tapered for about three or four threads, it is known as a

A. Taper tap

B. Bottoming tap

C. Second tap

D. None of these

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4

A drill considered as a cutting tool having zero rake, is known as a

A. Flat drill

B. Straight fluted drill

C. Parallel shank twist drill

D. Tapered shank twist drill

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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

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4

Which of the following parameters influence the axial feed rate in centerless grinding?

A. Regulating wheel diameter

B. Speed of the regulating wheel

C. Angle between the axes of grinding and regulating wheels

D. All of the above

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4

For harder alloy steel, 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

The size of a shaper is given by

A. Stroke length

B. Motor power

C. Mass of machine

D. Rate size

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4

In metal machining, the work-tool contact zone is a zone where heat is generated due to

A. Plastic deformation of metal

B. Burnishing friction

C. Friction between the moving chip and the tool face

D. None of the above

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4

A push broach as compared to pull broach

A. Has less number of teeth

B. Is short and stocky

C. Removes less material for each pass of the tool

D. All of the above