WORKSHOP TECHNOLOGY QUIZ

In permanent mould casting method

None of these

Molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition

Molten metal is poured and allowed to solidify while the mould is revolving

Molten metal is forced into mould under high pressure

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In backhand welding, the angle between the welding torch and the work is kept as

50°-60°

40°-50°

30°-40°

60°-70°

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When filing soft metals, the file teeth are clogged with minute particles of metal. The file should be cleaned by

Rubbing on wood

Using file card

Washing it with water

Washing it with dilute acid

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the most preferred process for casting gas turbine blades is

Shell moulding

Investment moulding

Sand casting

Die casting

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The metal is subjected to mechanical working for

Refining grain size

All of these

Controlling the direction of flow lines

Reducing original block into desired shape

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The upsetting is a process of

Joining the two surfaces of metal under pressure after heating

Increasing the cross-section of a bar

Reducing the cross-section of a bar

Bending of a bar

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The recrystallisation temperature of steel is

600°C

400°C

800°C

None of these

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The machining allowance provided on patterns depends upon

All of these

Size and shape of casting

Type of casting metal

Method of casting used

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The consumable electrode is used in

Submerged arc welding

TIG arc welding

MIG arc welding

Carbon arc welding

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In piercing operation, the clearance is provided on

Half on the punch and half on the die

Punch

Die

Either on punch or die depending upon designer's choice

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