Question

5a.) In machining, surface roughness increases with increasing:

i. Tool nose radius and feed.

ii. Feed and tool nose radius.

iii. None of the above.

iv. Not sure. I will take the penalty .

Justification:

5b.) If a cutting operation is performed at a feed rate of 5 in/min, and the feed is 0.005 in/rev, then the spindle RPM is:

i. 5000 RPM.

ii. 1000 RPM.

iii. There is no sufficient information to answer.

iv. Not sure. I will take the penalty .

Justification:

5c.) The hardness of a cutting tool increases with increasing temperature. Thus, it is always convenient to machine at higher speeds that lead to higher temperatures.

i. True. ii. False.

iii. The statement is true or false depending on other conditions.

iv. Not sure. I will take the penalty .

Justification:

5d.) In machining, if the cost to purchase/regrind the cutting tool =$0.00, the optimum speed for machining time minimization would be different from the optimum speed for production cost minimization.

i. True.

ii. False.

iii. The statement is true or false depending on other conditions.

iv. Not sure. I will take the penalty .

Justification:

Answer 1