Sewage sludge is ______________ type of non-Newtonian fluid?
Correct answer: D. Bingham plastic
- A. Dilatant
- B. None of these
- C. Pseudo plastic
- D. Bingham plastic
Explanation
Sewage sludge commonly behaves as a Bingham plastic: it requires a yield stress before flowing and then shows an approximately linear relation between shear stress and shear rate. This distinguishes it from a pseudoplastic fluid, whose apparent viscosity decreases continuously with shear rate.
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