For an open joint space to be obtained, the central ray must be ...

[formula1]

For an open joint space to be obtained, the central ray must be aligned ____ to the joint.
 
  a. perpendicular
  b. parallel

Question 2

Elongation occurs in all the following situations, except when
 
  a. the part is off-center.
  b. the central ray is angled with the part.
  c. the central ray and part are perpendicular but the IR is angled.
  d. the central ray and IR are perpendicular and the part is angled.

[yahahah24021]

Answer to Question 1

ANS: B

Answer to Question 2

ANS: D