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4

In piercing operation, the clearance is provided on

A. Punch

B. Die

C. Half on the punch and half on the die

D. Either on punch or die depending upon designer's choice

Correct Answer :

B. Die


Related Questions

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In a simple die

A. Two or more operations are performed simultaneously at the single stroke of the ram

B. Two or more cutting operations are performed at one station of the press in every stroke of the ram

C. Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram

D. None of the above

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The process used to improve fatigue resistance of the metal by setting up compressive stresses in its surface, is known as

A. Hot piercing

B. Extrusion

C. Cold peening

D. Cold heading

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The increase in hardness due to cold working, is called

A. Age hardening

B. Work hardening

C. Induction hardening

D. Flame hardening

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4

A neutral flame is obtained by supplying

A. Equal volumes of oxygen and acetylene

B. More volume of oxygen and less volume of acetylene

C. More volume of acetylene and less volume of oxygen

D. None of the above

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4

Extrusion

A. Is extensively used for making bolts and nuts

B. Is used for reducing the diameter of round bars and tubes by rotating dies which open and close rapidly on the work

C. Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface

D. Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part

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The difference between the upper limit and lower limit of a dimension is called

A. Nominal size

B. Basic size

C. Actual size

D. Tolerance

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The cold chisels are made from

A. Cast iron

B. Mild steel

C. High speed steel

D. Cast tool steel

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For welding plates of thickness more than 12.5 mm, its edges

A. Do not require bevelling

B. Should be bevelled to a single-V or U-groove

C. Should have a double-V or U-groove on one side

D. Should have a double-V or U-groove on both sides

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4

In a bilateral system of tolerance, the tolerance is allowed on

A. One side of the actual size

B. One side of the nominal size

C. Both sides of the actual size

D. Both sides of the nominal size

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4

In spot welding, the distance between the nearest edge of the plate and centre of weld should be equal to

A. d

B. 1.5d

C. 3d

D. 6d

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4

Rotary swaging

A. Is extensively used for making bolts and rivets

B. Is used for reducing the diameters of round bars and a tube by rotating dies which open and close rapidly on the work

C. Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface

D. Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part

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4

A hacksaw blade cuts on the

A. Forward stroke

B. Return stroke

C. Both forward and return strokes

D. Cutting depends upon the direction of force

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A jolt machine is used to

A. Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould

B. Ram the sand harder at the back of the mould and softer on the pattern face

C. Produce uniform sand hardness throughout the mould

D. Produce uniform packing of sand in the mould

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Cores are used to

A. Form internal cavities in the casting

B. Improve mould surface

C. Form a part of a green sand mould

D. All of these

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The maximum flame temperature occurs

A. At the outer cone

B. At the inner cone

C. Between the outer and inner cone

D. At the torch tip

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Neutral flame is used to weld

A. Steel

B. Cast iron

C. Copper

D. All of these

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The operation of straightening a curved sheet metal, is known as

A. Drawing

B. Squeezing

C. Coining

D. Planishing

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A file removes the metal during

A. Forward stroke

B. Return stroke

C. Both forward and return strokes

D. None of these

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4

The material which can be best cut with oxygen cutting process is

A. Mild steel

B. Brass

C. Copper

D. Aluminium

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4

For smoothing and cleaning out depressions in the mould, a __________ is used.

A. Slick

B. Lifter

C. Swab

D. Gagger

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The sand used for making cores is

A. Green sand

B. Dry sand

C. Loam sand

D. Oil sand

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The surface to be machined is marked on the pattern by

A. Red colour

B. Yellow colour

C. Black colour

D. Blue colour

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The tolerance produced by shell moulding process of casting is

A. +0.05 mm

B. ±0.2 mm

C. +0.5 mm

D. ±1 mm

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An oxidising process used for aluminium and magnesium articles is called

A. Galvanising

B. Anodising

C. Parkerising

D. Sherardizing

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In die casting, machining allowance is

A. Small

B. Large

C. Very large

D. Not provided

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A three high rolling mill consists of three rolls placed one above the other. Which of the following statement is correct?

A. The upper and middle rolls rotate in the same direction whereas the bottom roll rotates in opposite direction

B. The upper and bottom rolls rotate in the same direction whereas the middle roll rotates in opposite direction

C. The bottom and middle roll rotate in the same direction

D. Any one of the above

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4

In order to check the clearance between two mating surfaces, a ________ gauge should be used.

A. Ring

B. Plug

C. Feeler

D. None of these

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4

Lancing is the operation of

A. Cutting a sheet of metal in a straight line along the length

B. Removal of metal to the desired shape from the edge of a plate

C. Cutting a sheet of metal through part of its length and then bending the cut portion

D. Bending a sheet of metal along a curved axis

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The cutting edge of a chisel should be

A. Hardened

B. Tempered

C. Hardened and tempered

D. Case hardened

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In forehand welding, the angle between the welding torch and the work is ________ as compared to backhand welding.

A. Same

B. Less

C. More

D. None of these