Mechanical Engineering - Workshop Technology

6. 

Cores are used to

A. form internal cavities in the casting
B. improve mould surface
C. form a part of a green sand mould
D. all of these

Answer: Option D

Explanation:

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7. 

The drawing down is a process of __________ the cross-section of a bar.

A. increasing
B. reducing

Answer: Option B

Explanation:

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8. 

During hot working of metals

A. poor surface finish is produced
B. scale is formed on the metal surface
C. close tolerances can not be maintained
D. all of these

Answer: Option D

Explanation:

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9. 

When a pattern is made in three parts, the __________ is known as a drag.

A. bottom part
B. middle part
C. top part

Answer: Option A

Explanation:

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10. 

Shrinkage allowance is made by adding to external dimensions and subtracting from internal dimensions.

A. Agree
B. Disagree

Answer: Option A

Explanation:

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