For threading, the spindle should be turning: A) At about ...

[s.tung]

For threading, the spindle should be turning:
 
  A) At about one-fourth normal turning speeds
  B) At the slowest speed the lathe can be set
  C) At the RPM given in standard charts for the type of metal you are working on
  D) None of the above

Question 2

When hardness increases, what else also increases?
 
  A) Ductility B) Tensile strength
  C) Depth of penetration D) Plasticity

[cdmart10]

Answer to Question 1

C

Answer to Question 2

B

[s.tung]

TYSM

[dantucker]

YES! Correct, THANKS for helping me on my review