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
d
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What is the absolute value of 13 subtracted from the absolute value of -20?
A. 0 B. 7 C. 13 D. 20
? Identify and state the historical significance of Caleb Cushing.
What will be an ideal response?
Valve spring inserts (shims) are designed to ________
A) Adjust the correct valve spring installed height B) Decrease installed height of the valve C) Increase installed height of the valve D) Decrease valve spring pressure to compensate for decreased installed height
This can be used when additional daylight is desirable in a room or for natural light to enter an interior room.
What will be an ideal response?