Mechanical Engineering - Workshop Technology

1. 

The vertical welding do not require plate edge preparation upto 16 mm thickness.

A. Correct
B. Incorrect

Answer: Option A

Explanation:

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2. 

The dowels are

A. wooden nails
B. box nails
C. wire nails
D. none of these

Answer: Option A

Explanation:

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3. 

In arc welding, the temperature of heat produced by the electric arc is of the order of

A. 3000° C to 4000° C
B. 4000° C to 5000° C
C. 5000° C to 6000° C
D. 6000° C to 7000° C

Answer: Option D

Explanation:

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4. 

Extrusion

A. is extensively used for making bolts and nuts
B. is used for reducing the diameter of round bars and tubes by rotating dies which open and close rapidly on the work
C. is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface
D. consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part

Answer: Option D

Explanation:

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5. 

The operation of cutting of a flat sheet to the desired shape is called

A. shearing
B. piercing
C. punching
D. blanking

Answer: Option A

Explanation:

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