Exercise: Fluid Flow

Questions for: Fluid Flow

A Newtonian fluid is one in which the viscosity
A:
is constant regardless of the stirrer speed or mixing time
B:
changes during mixing but returns to its original state after mixing
C:
increases with increasing stirrer speed
D:
decreases with increasing stirrer speed
Answer: A
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The medium will have the highest viscosity (considering that the cells do not secrete gums) with the presence of
A:
single celled bacteria
B:
filamentous fungi that form pellets
C:
filamentous fungi that grow as long poorly branched chains
D:
yeast
Answer: C
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A fluid in which the viscosity increases with increasing stirrer speed and mixing time can be called as
A:
newtonian fluid
B:
pseudoplastic, thixotropic fluid
C:
dilatant, rheopectic fluid
D:
dilatant pseudoplastic fluid
Answer: C
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A rheopectic fluid is one in which the viscosity
A:
is constant regardless of the stirrer speed or mixing time
B:
changes during mixing but returns to its original state after mixing
C:
increases with mixing time
D:
decreases with mixing time
Answer: C
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A dilatant fluid is one in which the viscosity
A:
is constant regardless of the stirrer speed or mixing time
B:
changes during mixing but returns to its original state after mixing
C:
increases with increasing stirrer speed
D:
decreases with increasing stirrer speed
Answer: C
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