To ensure safe usage of nitrous oxide for dental personnel, the ...

[penguins]

To ensure safe usage of nitrous oxide for dental personnel, the chairside personnel exposed to nitrous oxide should be checked ________ a year.
 a. once
  b. twice
  c. four times
  d. twelve times

Question 2

To recheck your film positioning, the dot on the film is to be towards the occlusal/incisal surface.
 a. True
  b. False
 Indicate whether the statement is true or false

[CharlieArnold]

Answer to Question 1

b
RATIONALE: To ensure safe usage of nitrous oxide for dental personnel, the chairside personnel exposed to nitrous oxide should be checked twice a year.

Answer to Question 2

True
RATIONALE: To recheck your film positioning, the dot on the film is to be towards the occlusal/incisal surface.

[penguins]

Excellent

[bassamabas]

Gracias!