Hollenhorst plaque, bilateral:

A rhythm that originated in the SA node is determined by a:

A) P wave with a negative deflection B) P wave with a positive deflection C) P wave that is not upright D) P wave that is inverted

Which of the following classes of ovens and furnaces operates at approximately atmospheric pressure where no flammable volatiles or combustible materials are being heated?

A. Class A B. Class B C. Class C D. Class D