The welded metal bellows seal uses a bellows instead of _____.
a. springs
b. seal faces
c. centering tabs
d. O-rings
Question 2
A mechanical seal that is actually two seals, with one inner seal designed to handle full system pressure, and
one outer seal that serves as a backup if the inner seal fails, is known as a _____ seal.
a. single inside
b. face-to-face
c. back-to-back
d. tandem