What is the difference between polyacrylate seals and silicone seals?
What will be an ideal response?
Polyacrylate seals look the same as nitrile seals. They are elastomers designed for higher temperatures (to 3000F-3500F depending on the lubricant). They are also resistant to extreme pressure lubricants. Polyacrylate is often used for differential pinion bearing seals.
Silicone seals are often used in engines and transmissions. They are usually colored gray, red, orange, or blue. Silicone is a polymer that is very flexible and absorbs lubricant. Silicone seals are resistant to friction and wear. They can operate at temperatures from 3250F to 3500F depending on the lubricant used.
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Which of the following can be stored in an atmospheric tank?
A. Toxic vapors B. Raw materials C. Toxic liquids D. High vapor pressure liquids
List the six components commonly used in growing media and provide the function of each
What will be an ideal response?
Why does retarding injection timing tend to produce higher HC emissions?
A. increases injection lag B. reduces time available for combustion C. increases ignition lag D. increases combustion temperatures
Circulating water via condensation, ____ allow for long spans of time between maintenance and can
provide ornamental focal areas within an interior design.
a. plants in containers c. terraria b. irrigation systems d. orangeries