A rotational viscometer containing a non-Newtonian fluid gives a dial reading of 14 at a rotor speed of 300 rpm and a dial reading of 24 at a rotor speed of 600 rpm. Which of the following is the correct rheological model of this fluid considering the Bingham model?

A rotational viscometer containing a non-Newtonian fluid gives a dial

1.	A rotational viscometer containing a non-Newtonian fluid gives a dial reading of 14 at a rotor speed of 300 rpm and a dial reading of 24 at a rotor speed of 600 rpm. Which of the following is the correct rheological model of this fluid considering the Bingham model?
A.	<sub>p</sub> =8 cp, <sub>y</sub>=8 lbf/100 ft<sup>2</sup>
B.	<sub>p</sub> =12 cp, <sub>y</sub>=8 lbf/100 ft<sup>2</sup>
C.	<sub>p</sub> =10 cp, <sub>y</sub>=4 lbf/100 ft<sup>2</sup>
D.	<sub>p</sub> =8 cp, <sub>y</sub>=16 lbf/100 ft<sup>2</sup>
Answer» D. <sub>p</sub> =8 cp, <sub>y</sub>=16 lbf/100 ft<sup>2</sup>