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4

In blanking 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 :

A. Punch


Related Questions

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4

A casting defect which occurs due to improper venting of sand is known as

A. Cold shuts

B. Blow holes

C. Shift

D. Swell

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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 progressive limit gauge has

A. 'Go' and 'Not go' member on the same side of the gauge

B. Separate 'Go' and 'Not go' members

C. 'Go' member at one end and 'Not go' member at the other end

D. None of the above

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4

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

When more volume of acetylene and less volume of oxygen is supplied, then a ________ flame is obtained.

A. Neutral

B. Oxidising

C. Carburising

D. None of these

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4

Most of the oxyacetylene welding is done with

A. Neutral flame

B. Oxidising flame

C. Carburising flame

D. All of these

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4

The temperature of the inner luminous cone of neutral flame is about

A. 1000°C

B. 1250°C

C. 2100°C

D. 3200°C

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4

The edge of a steel plate cut by oxygen cutting will get hardened when the carbon content is

A. Less than 0.1 percent

B. Less than 0.3 percent

C. More than 0.3 percent

D. Anywhere between 0.1 to 1 percent

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4

Seam welding is a

A. Continuous spot welding process

B. Multi-spot welding process

C. Arc welding process

D. Process used for joining round bars

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4

The directional solidification in casting can be improved by using

A. Chills and chaplets

B. Chills and padding

C. Chaplets and padding

D. Chills, chaplets and padding

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4

A two high rolling mill consists of two rolls which rotate

A. At the same speed and in the same direction

B. At the same speed but in opposite direction

C. At different speeds and in the same direction

D. At different speeds and in the opposite direction

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4

A pattern maker's shrinkage rule considers

A. All pattern allowances

B. Only shrinkage allowance

C. All materials to be cast

D. All materials of the pattern

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4

For welding plates of thickness less than 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 order to ram the sand harder at the back of the mould and softer on the pattern face, a ________ is used.

A. Sand slinger

B. Squeezing machine

C. Jolt machine

D. Stripper plate machine

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4

A basic shaft is one whose

A. Lower deviation is zero

B. Upper deviation is zero

C. Lower and upper deviations are zero

D. None of these

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4

For obtaining a cup of diameter 25 mm and height 15 mm by drawing, the size of the round blank should be approximately

A. 42 mm

B. 44 mm

C. 46 mm

D. 48 mm

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4

In a _________, the molten metal is poured and allowed to solidify while the mould is revolving.

A. Die casting method

B. Slush casting method

C. Permanent mould casting method

D. Centrifugal casting method

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4

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

An oxidising process used for aluminium and magnesium articles is called

A. Galvanising

B. Anodising

C. Parkerising

D. Sherardizing

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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

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4

Swab is used for

A. Smoothing and cleaning out depressions in the mould

B. Cleaning the moulding sand

C. Moistening the sand around the edge before removing pattern

D. Reinforcement of sand in the top part of the moulding box

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4

The operation of cutting a sheet of metal in a straight line along the length, is known as

A. Plunging

B. Notching

C. Slitting

D. Forming

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4

The electron beam welding can be carried out in

A. Open air

B. A shielded gas environment

C. Vacuum

D. A pressurised inert gas chamber

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4

In electric resistance welding, voltage required for heating is

A. 1 to 5 volts

B. 6 to 10 volts

C. 11 to 20 volts

D. 50 to 100 volts

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4

In a gas welding of mild steel using an oxyacetylene flame, the total amount of acetylene consumed is 10 litres. The oxygen consumption from the cylinder is

A. 5 litres

B. 10 litres

C. 15 litres

D. 20 litres

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4

The casting method adopted for ornaments and toys of nonferrous alloys, is

A. Permanent mould casting

B. Slush casting

C. Die casting

D. Centrifugal casting

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4

The welding process used in joining mild steel shanks to high speed drills, is

A. Spot welding

B. Seam welding

C. Flash butt welding

D. Upset butt welding

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4

When a pattern is made in three parts, the ________ is known as a drag.

A. Bottom part

B. Middle part

C. Top part

D. None of these

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4

According to Indian standards, the total numbers of tolerance grades are

A. 8

B. 12

C. 18

D. 20

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4

During cold working process

A. Grain structure is distorted

B. Strength and hardness of metal increases

C. Close dimensional tolerance can be maintained

D. All of the above