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ISRO Mechanical Engg.: Manufacturing Quiz 2
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Question 1
Ring Rolling is used __________.
Question 2
Internal and external threads can be produced on tapered surfaces conveniently by
Question 3
In a cutting operation the cutting speed was reduced by 20%. Assuming n = 0.5 and C = 350 in Taylor's equation, the increase in tool life is
Question 4
A resistance spot-welding operation is performed on two pieces of 1.5 mm thick sheet steel using 12000 amps current for a duration of 0.20 second. The electrodes are 6 mm in diameter at the contacting surfaces. Resistance is assumed to be 0.0001 ohms and the resulting weld nugget is 6 mm in diameter and 2.5 mm thick. The unit melting energy for the metal is 12J/mm3. What portion of heat generated was used to form the weld?
Question 5
The rake angle of a cutting tool is 15 °C, shear angle 45 °C and cutting velocity 35 m/min. What is the velocity of chip along the tool face?
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