Mechanical Engineering - Workshop Technology

36. 

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

Answer: Option D

Explanation:

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37. 

In submerged arc welding, an arc is produced between a

A. carbon electrode and the work
B. metal electrode and the work
C. bare metal electrode and the work
D. two tungsten electrodes and the work

Answer: Option C

Explanation:

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38. 

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

Answer: Option C

Explanation:

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39. 

In a die casting method, the molten metal is forced into mould under high pressure.

A. Correct
B. Incorrect

Answer: Option A

Explanation:

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40. 

In a centrifugal casting method, the impurities are collected in the centre of the casting.

A. Yes
B. No

Answer: Option A

Explanation:

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