Mechanical Engineering - Workshop Technology

41. 

In blanking operation, the clearance is provided on

A. punch
B. die
C. half on the punch and half on the die
D. either on punch or die depending upon designer's choice

Answer: Option A

Explanation:

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42. 

In piercing operation, the clearance is provided on

A. punch
B. die
C. half on the punch and half on the die
D. either on punch or die depending upon designer's choice

Answer: Option B

Explanation:

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43. 

If an aluminium pattern made from a wooden master pattern is to be used for grey iron castings, then the shrinkage allowance allowed on the wooden pattern should be

A. 10 mm/m
B. 16 mm/m
C. 20 mm/m
D. 26 mm/m

Answer: Option D

Explanation:

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44. 

For arc welding

A. alternating current with high frequency is used
B. alternating current with low frequency is used
C. direct current is used
D. any one of these

Answer: Option C

Explanation:

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45. 

When the file is moved to and fro over the work, it is known as

A. cross filing
B. draw filing
C. pull and push filing
D. none of these

Answer: Option B

Explanation:

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