The percent of thread of the internal thread is affected by: ...

[audie]

The percent of thread of the internal thread is affected by:
 
  A) Making taps for certain classes of fits such as 1B, 2B and 3B
  B) Varying the bore diameter
  C) Making taps with 60, 75, and 80 percent threads
  D) Varying the major diameter

Question 2

To insure concentricity for a single point internal threading operation:
 
  A) Center the work in a four jaw chuck B) Bore the hole to the correct size
  C) Drill slightly under the required ID D) Ream the hole to make it round

[sabina576]

Answer to Question 1

B

Answer to Question 2

C

[audie]

Thanks for the timely response, appreciate it

[upturnedfurball]

Gracias!