Fluid Flow

Question: Bubble free aeration systems requires [A]. silicone tubing or gas permeable membranes to facilitate gas transfer [B]. carbon dioxide instead of air to supply oxygen [C]. silicone tubing or gas permeable membranes to remove carbon dioxide by oxygen in the form of hydrogen peroxide [D]. filled headspace of the reactor with carbon dioxide Answer:…

Question: In animal cell bioreactor, bubble damage can be minimized by [A]. the addition of a shear protectorant [B]. using a bubble free oxygen delivery system [C]. headspace aeration [D]. all of the above Answer: Option D Explanation: No answer description available for this question.

Question: Which of the following can act as a shear protectorant? [A]. Serum [B]. Silicone oil [C]. Glucose [D]. Glutamic acid Answer: Option A Explanation: No answer description available for this question.

Question: Pluronic F68 is added to cell culture media as [A]. a nutrient [B]. a shear protectorant [C]. to increase oxygen transfer rates [D]. all of these Answer: Option B Explanation: No answer description available for this question.

Question: 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 Answer: Option A Explanation: No answer description available…

Question: 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 Answer: Option C Explanation:…

Question: Reynolds number for turbulent flow over a plate should be more than [A]. 5 x 10-5 [B]. 106 [C]. 5 x 105 [D]. 500 Answer: Option B Explanation: No answer description available for this question.

Question: Reynolds number for laminar flow over a plate should be less than [A]. 500 mm [B]. 5 x 10-5 [C]. 5 x 105 [D]. 5 m Answer: Option C Explanation: No answer description available for this question.

Question: Which of the following describes the detrimental effect of bubbles on animal cells? [A]. Cells trapped on the surface of bubbles can be damaged when the bubbles explode, releasing their pressure and surface energies [B]. Cells trapped in the moving foam can be dragged apart by the bubbles [C]. Both (a) and (b) [D]….

Question: Filamentous fungal cells are more shear sensitive than bacterial cells because of [A]. the presence of citin in cell walls of filamentous fungi [B]. larger in size than bacterial cells and therefore are more susceptible to shear forces [C]. fungal cells are much larger than bacterial cells [D]. all of the above Answer: Option…