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4

Which of the following statement is wrong?

A. The angular clearance on dies varies from 0.5° to 1°

B. In drawing operation, the metal flows due to plasticity

C. In press operation, the size of the pierced hole is independent of the size of punch

D. None of the above

Correct Answer :

D. None of the above


Related Questions

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4

The draft or taper allowance on casting is generally

A. 1 to 2 mm/m

B. 2 to 5 mm/m

C. 5 to 10 mm/m

D. 10 to 15 mm/m

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4

If an aluminium pattern made from a wooden master pattern is to be used for grey iron castings, then the shrinkage allowance allowed on the wooden pattern should be

A. 10 mm/m

B. 16 mm/m

C. 20 mm/m

D. 26 mm/m

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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

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

Green sand is a mixture of

A. 30% sand and 70% clay

B. 50% sand and 50% clay

C. 70% sand and 30% clay

D. 90% sand and 10% clay

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4

In forehand welding, the weld is made

A. From left to right

B. From right to left

C. First from left to right and then from right to left

D. Either from left to right or from right to left

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4

Which of the following statement is wrong?

A. The angular clearance on dies varies from 0.5° to 1°

B. In drawing operation, the metal flows due to plasticity

C. In press operation, the size of the pierced hole is independent of the size of punch

D. None of the above

What is the correct answer?

4

The welding process used to join the ends of two pipes of uniform cross-section, is

A. Spot welding

B. Seam welding

C. Projection welding

D. Upset butt welding

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4

The cold chisels are made by

A. Drawing

B. Rolling

C. Piercing

D. Forging

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4

The centrifugal casting method, is used for casting articles of

A. Symmetrical shape about vertical axis

B. Symmetrical shape about horizontal axis

C. Irregular shape

D. Nonferrous metal only

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4

In forehand welding, the angle between the welding rod and the work is kept as

A. 30°-40°

B. 40°-50°

C. 50°-60°

D. 60°-70°

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4

In a compound die

A. Only one operation is performed at each stroke of the ram

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

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

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

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4

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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4

Notching 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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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 TIG arc welding, the welding zone is shielded by an atmosphere of

A. Helium gas

B. Argon gas

C. Either (A) or (B)

D. None of these

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4

In average work, the tolerance produced by investment casting method is

A. ±0.05 mm

B. +0.2 mm

C. +05 mm

D. +1 mm

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4

In a four high rolling mill, the diameter of backing up rolls is ________ the diameter of working rolls.

A. Equal to

B. Smaller than

C. Larger than

D. None of these

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4

Thermit welding is often used in

A. Replacing broken gear teeth

B. Repairing broken shears

C. Joining rails, truck frames and locomotive frames etc.

D. All of the above

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4

In electric resistance welding, pressure applied varies from

A. 1 to 5 MPa

B. 5 to 10 MPa

C. 10 to 25 MPa

D. 25 to 55 MPa

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4

In a centrifugal casting method

A. Core is made of sand

B. Core is made of ferrous metal

C. Core is made of nonferrous metal

D. No core is used

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4

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

A. Same

B. Less

C. More

D. None of these

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4

The metal is subjected to mechanical working for

A. Refining grain size

B. Reducing original block into desired shape

C. Controlling the direction of flow lines

D. All of these

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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

The parts of circular cross-section which are symmetrical about the axis of rotation are made by

A. Hot forging

B. Hot spinning

C. Hot extrusion

D. Hot drawing

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4

Which of the following material can be used for making patterns?

A. Aluminium

B. Wax

C. Lead

D. All of these

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4

In a cold chamber die casting machine, only nonferrous alloys with _________ are casted.

A. Low melting temperature

B. High melting temperature

C. Both (A) and (B)

D. None of these

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4

The process of decreasing the cross-section of a bar and increasing its length, is called

A. Drawing down

B. Upsetting

C. Spinning

D. Peening

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4

The temperature produced by oxy-hydrogen flame is about

A. 1800°C

B. 2100°C

C. 2400°C

D. 3200°C

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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