Questions and answers for exam Preparation

MCQs

Total Questions : 99 | Page 3 of 10 pages

Question 21. A Brookfield viscometer cannot determine the shear stress because

the shear stress is not defined
a computer is required
the impeller type is given only by numbers
all of the above

Discuss Question

Answer: Option A. -> the shear stress is not defined
Answer: (a).the shear stress is not defined

Question 22. Which of the following is correct?

The viscosity of liquids and gases decrease with increasing temperature
The viscosity of liquids and gases increase with increasing temperature
the viscosity of gases increases with increasing temperature, but decreases in liquids
the viscosity of gases decreases with increasing temperature, but decreases in liquids.

Discuss Question

Answer: Option C. -> the viscosity of gases increases with increasing temperature, but decreases in liquids
Answer: (c).the viscosity of gases increases with increasing temperature, but decreases in liquids

Question 23. The viscous nature of a non-Newtonian fluid

remains constant with time and power input
changes with the level of power input and/or the length of time during which the fluid is mixed
is similar to that of a perfect gas
is similar to that of water

Discuss Question

Answer: Option B. -> changes with the level of power input and/or the length of time during which the fluid is mixed
Answer: (b).changes with the level of power input and/or the length of time during which the fluid is mixed

Question 24. Which of the following factors will affect the sensitivity of animal cells to shear conditions?

Cell size
Availability of nutrients in the medium
The presence of shear protectorants in the medium
All of the above

Discuss Question

Answer: Option D. -> All of the above
Answer: (d).All of the above

Question 25. Which of the following compound, if added to a solution will lead to the greatest increase in viscosity?

A globular protein
Glucose
A long chain protein such as albumin
Water

Discuss Question

Answer: Option C. -> A long chain protein such as albumin
Answer: (c).A long chain protein such as albumin

Question 26. A Brookfield viscometer measures viscosity by determining

the shear stress
the shear rate
the shear stress and shear rate
the torque required to move an impeller at a set speed

Discuss Question

Answer: Option D. -> the torque required to move an impeller at a set speed
Answer: (d).the torque required to move an impeller at a set speed

Question 27. The best described action of Pluronic F68 (non-ionic detergent) in a cell culture medium is that, it

acts on the surface properties of the cells and the culture medium
provides nutrients for the cells
acts as a flocculant
acts as a coagulant

Discuss Question

Answer: Option A. -> acts on the surface properties of the cells and the culture medium
Answer: (a).acts on the surface properties of the cells and the culture medium

Question 28. Water is a