Chapter 20 Multiple Choice
Which one of the following metals would usually have the lowest unit horsepower in a machining operation:
(a) aluminum
According to the Merchant equation, an increase in rake angle would have which of the following results, all other factors remaining the same (two best answers):
(b) decrease in power requirements (e) increase in shear plane angle
In using the orthogonal cutting model to approximate a turning operation, the chip thickness before the cut to corresponds to which one of the following cutting conditions in turning:
(b) feed f
Which of the following cutting conditions has the strongest effect on cutting temperature:
(b) speed
The chip thickness ratio is which one of the following:
(b) to/tc
For which one of the following values of chip thickness before the cut to would you expect the specific energy in machining to be the greatest:
(c) 0.12 mm
Which one of the four types of chip would be expected in a turning operation conducted at low cutting speed on a brittle work material:
(c) discontinuous
A roughing operation generally involves which one of the following combinations of cutting conditions:
(c) low v, high f and d
With which one of the following geometric forms is the drilling operation most closely associated:
(c) round hole
If the cutting conditions in a turning operation are cutting speed = 300 ft.min, feed = 0.010 in/rev, and depth cut = 0.100 inch, which one of the following is the material removal rate:
(d) 3.6 in^3/min
Which of the following are characteristics of the orthogonal cutting model (three best answers):
(d) only two dimensions play an active role in the analysis (f) the cutting edge is perpendicular to the direction of the cutting speed (g) the two elements of tool geometry are rake and relief angle
Which of the following manufacturing processes are classified as material removal processes (two correct answers):
(e) grinding (f) machining
A lathe is used to perform which one of the following manufacturing operations:
(e) turning
