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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

Correct Answer :

D. All of these


Related Questions

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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

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

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

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

The acetylene cylinder is usually painted with

A. Black colour

B. White colour

C. Maroon colour

D. Yellow colour

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4

The cold chisels are made from

A. Cast iron

B. Mild steel

C. High speed steel

D. Cast tool steel

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4

The chisel used for cutting key ways is

A. Flat chisel

B. Cape chisel

C. Round nose chisel

D. Diamond pointed chisel

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4

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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4

A file with 20 teeth in 25 mm is called

A. Rough file

B. Bastard file

C. Second cut file

D. Smooth file

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4

The algebraic difference between the maximum limit and the basic size is called

A. Actual deviation

B. Upper deviation

C. Lower deviation

D. Fundamental deviation

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4

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

The minimum size of a bloom is

A. 5 cm × 5 cm

B. 10 cm × 10 cm

C. 15 cm × 15 cm

D. 20 cm × 20 cm

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4

The machining allowance provided on patterns depends upon

A. Type of casting metal

B. Size and shape of casting

C. Method of casting used

D. All of these

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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

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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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

During drawing operation, the states of stress in cup would include

A. Compressive stress in the flange

B. Tensile stress in the wall

C. Both (A) and (B)

D. None of these

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4

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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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 shielded arc welding

A. Large electrode is used

B. Welding rod coated with slag is used

C. Welding rod coated with fluxing material is used

D. None of the above

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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

The accuracy of micrometers, calipers, dial indicators can be checked by a

A. Feeler gauge

B. Slip gauge

C. Ring gauge

D. Plug gauge

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4

During hot working of metals

A. Porosity of the metal is largely eliminated

B. Grain structure of the metal is refined

C. Mechanical properties are improved due to refinement of grains

D. All of the above

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4

The temperature at which the new grains are formed in the metal is called

A. Lower critical temperature

B. Upper critical temperature

C. Eutectic temperature

D. Recrystallisation temperature

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4

The electrodes used in spot welding have a tip of

A. Stainless steel

B. Aluminium

C. Copper

D. Brass

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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

Projection 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

In order to deliver molten metal from pouring basin to gate, a ________ is used.

A. Riser

B. Sprue

C. Core

D. None of these

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4

Carburising flame is used to weld

A. Steel, cast iron, copper, aluminium etc

B. Brass and bronze

C. Hard surfacing materials such as stellite

D. All of these

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4

The metal patterns as compared to wooden patterns require less

A. Shrinkage allowance

B. Machining allowance

C. Draft allowance

D. Distortion allowance