Mechanical Engineering - Workshop Technology

31. 

In order to cut mild steel, the cutting angle of chisel should be

A. 30°
B. 45°
C. 50°
D. 60°

Answer: Option D

Explanation:

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32. 

The operation of straightening a curved sheet metal, is known as

A. drawing
B. squeezing
C. coining
D. planishing

Answer: Option D

Explanation:

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33. 

The correct sequence for preparing a billet for extrusion process is pickling, alkaline cleaning, phosphate coating and lubricating with reactive soap.

A. Yes
B. No

Answer: Option A

Explanation:

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34. 

Tandem drawing of wires and tubes is necessary because

A. it is not possible to reduce at one stage
B. annealing is needed between stages
C. accuracy in dimensions is not possible otherwise
D. surface finish improves after every drawing stage

Answer: Option B

Explanation:

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35. 

In a __________ , both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram.

A. simple die
B. progressive die
C. combination die
D. compound die

Answer: Option C

Explanation:

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