Workshop Technology - Mechanical Engineering Questions and Answers

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The advantage of thermit welding is that

all parts of the weld section are molten at the same time

weld cools almost uniformly

results in a minimum problem with internal residual stresses

all of the above

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A gimlet is a __________ tool.

boring

marking

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Slick is used for repairing and finishing the mould.

Correct

Incorrect

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The maximum flame temperature occurs

at the outer cone

at the inner cone

between the outer and inner cone

at the torch tip

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During cold working process

grain structure is distorted

strength and hardness of metal increases

close dimensional tolerance can be maintained

all of the above

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

washing it with water

rubbing on wood

washing it with dilute acid

using file card

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In back-hand welding, the angle between the welding rod and the work is __________ as compared to fore-hand welding.

same

less

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Lap joints are employed on plates having thickness

less than 3 mm

5 to 10 mm

12.5 mm

above 25 mm

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A large electrode is used in un-shielded arc welding.

Correct

Incorrect