The class of mail delivery of books and manuscripts of at least ...

[colton]

The class of mail delivery of books and manuscripts of at least 24 pages is
 
 special fourth class
  second class
  third class
  first class

Question 2

All of the following statements are correct regarding an ECG tracing artifact EXCEPT
 
 Shivering from nervousness or cold can produce muscle voltage artifacts.
  AC interference is caused by electrical activity.
  The latest models of ECGs have sensitive filtering devices that eliminate most of the interference.
  An interrupted baseline is caused by a patient with a neurological condition.

[ghepp]

Answer to Question 1

special fourth class

Rationale: Special fourth class is used for books and manuscripts.

Answer to Question 2

An interrupted baseline is caused by a patient with a neurological condition.

Rationale: An interrupted baseline is caused by an electrode becoming separated from the wire or by a broken lead wire.