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The proportion of acetylene and oxygen used in gas welding is

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The length of the oxidizing flame is smallest compared to

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Non consumable electrodes, used in arc welding are made of

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The deflection of Arc from its intended path is called ‘Arc blow’

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In metal arc welding

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Weldability depends on

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Hydrogen induced cracking occurs in the heat effected zone adjacent to

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DC with reverse polarity is used in

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In gas welding the metal to be joined gets oxidized or carburized

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Which of the following are associated with Heat Affected Zone?

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The advantage o the welding process is

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Brittle welds are mainly obtained due to

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Which of the following factors improve weldability of steel?

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Cold-cracking in steel weldments depends on

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(a) Laser beam welding (b) Electron beam welding (c) Ultrasonic welding.

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Cast iron is difficult to weld, because of

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The process is characterized by its high speed welding, is known as

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During plasma arc welding of aluminium, improved removal of

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Inert gas and bare electrode instead of flux coated electrode is used in the case of

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It is generally difficult to weld Aluminium parts by

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