Mechanical Engineering - Workshop Technology

21. 

The low pressure acetylene is produced at the welding site by the chemical reaction between water and calcium carbonate.

A. Correct
B. Incorrect

Answer: Option B

Explanation:

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22. 

The fullers are used

A. for finishing flat surfaces
B. for necking down a piece of work
C. for punching a hole
D. to finish the punched hole

Answer: Option B

Explanation:

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23. 

The cold chisels are made by

A. drawing
B. rolling
C. piercing
D. forging

Answer: Option D

Explanation:

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24. 

The property of sand due to which it evolves a great amount of steam and other gases is called

A. collapsibility
B. permeability
C. cohesiveness
D. adhesiveness

Answer: Option B

Explanation:

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25. 

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. non-ferrous metal only

Answer: Option B

Explanation:

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