200 Best MCQs on fluid flow- biochemical engineering
Q17). A Brookfield viscometer measures viscosity by determining
a).the shear stress
b).the shear rate
c).the shear stress and shear rate
d).the torque required to move an impeller at a set speed
Correct Answer:
the torque required to move an impeller at a set speed
Explaination:
Q18). Which of the following factors will affect the sensitivity of animal cells to shear conditions?
a).Cell size
b).Availability of nutrients in the medium
c).The presence of shear protectorants in the medium
d).All of the above
Correct Answer:
All of the above
Explaination:
Q19). The best described action of Pluronic F68 (non-ionic detergent) in a cell culture medium is that, it
a).acts on the surface properties of the cells and the culture medium
b).provides nutrients for the cells
c).acts as a flocculant
d).acts as a coagulant
Correct Answer:
acts on the surface properties of the cells and the culture medium
Explaination:
Q20). Water is a
a).newtonian fluid
b).pseudoplastic
c).dilatant
d).rheopectic
Correct Answer:
newtonian fluid
Explaination:
Q21). Which of the following affect the Kolmogorov eddy size?
a).Stirrer speed
b).Physical properties of the liquid
c).Size and type of impeller
d).All of these
Correct Answer:
All of these
Explaination:
Q22). A liquid is flowing at 11,400 l.h-1 along a pipeline having a diameter of 4 cm. If the liquid has a density of 1 g.ml-1 and viscosity of 0.001kg.m-1.s-1, then the liquid would be in the
a).laminar phase
b).transient phase
c).turbulent phase
d).any of the phase
Correct Answer:
turbulent phase
Explaination:
Q23). The viscosity of a fluid increases with the length of time that it is being mixed. This fluid would be best described as being
a).newtonian
b).rheopectic
c).viscoelastic
d).thixotropic
Correct Answer:
rheopectic
Explaination:
Q24). Which of the following can act as a shear protectorant?
a).Serum
b).Silicone oil
c).Glucose
d).Glutamic acid
Correct Answer:
Serum
Explaination: