Statement 1: In μ_a= τ/γ = Kγ^(n-1) , n = consistency index and K is the flow behaviour index. Statement 2: n= 1 for Newtonian fluids, n<1 for dilatant fluids and n>1 for pseudo plastic fluids.

← Prev Question Next Question →

1 Answer

Related questions

+2 votes

1 answer

Statement 1: Considering the equation, μ_a= τ/γ = Kγ^(n-1) , for pseudo plastic fluids, n<1 and they’re called Shear thinning liquids and dilatant fluids are called Shear thickening liquids as n>1. Statement 2: Cooked starch solution is a Shear thinning liquid and dairy cream is a Shear thickening liquid.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+1 vote

1 answer

Statement 1: Apparent viscosity μ_a is related to shear stress (τ) and shear strain (γ) as μ_a= τ/γ Statement 2: The equation τ=Kγ<sup>n</sup> becomes μ_a= τ/γ = Kγ^(n-1).

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+1 vote

1 answer

Statement 1: Non-Newtonian fluids have a linear relationship between shear stress and shear strain. Statement 2: Tubes are larger than pipes in diameter and have thicker walls.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+1 vote

1 answer

Statement 1: Brookfield viscometer is very robust, is supported by software and even shows values of K and n, but, sometimes particles suspended in the fluid cause problems. Statement 2: Drawbacks of plate and cone viscometer: edge-effects, turbulence and temperature effects.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+1 vote

1 answer

Statement 1: Blood is a _____ Statement 2: Thixotropic fluids are fluids whose viscosity decreases when subjected to shear stress initially but eventually with time, the viscosity increases.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+1 vote

1 answer

Statement 1: Bernoulli’s equation can be applied to flow through pipes both, with and without friction. Statement 2: Air is an incompressible fluid.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+2 votes

1 answer

Statement 1: Generally needle valves are not used for liquids. Statement 2: For a unidirectional flow, non return valves are used.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+1 vote

1 answer

Statement 1: For rough control of flow _____ are used. Statement 2: For fine control of flow _____ are used.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+1 vote

1 answer

Statement 1: Friction factor ‘f’ is an important factor in turbulent flow. Statement 2: ‘f’ is the ratio of shear stress (ϩw) to kinetic energy head ((ρv2)⁄2g).

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+1 vote

1 answer

Statement 1: Fans and blowers create pressure energy whereas compressors don’t. Statement 2: In food processing various liquids like milk and juices are transported by pumps

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+1 vote

1 answer

Statement 1: Diaphragm pumps can handle corrosive material and do not have leakage problems, but, they only vibrate hence the output is low. Statement 2: Diaphragm pump is an example of _____

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+1 vote

1 answer

Statement 1: Starch is _____ as its viscosity decreases with an increase in shear stress. Statement 2: Bingham plastics follow Newton’s law of viscosity at low shears.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+1 vote

1 answer

Statement 1: Reynolds number is the ratio of viscous force to Inertial Force. Statement 2: The thickness of Boundary layer increases with the increase in distance from the surface.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+2 votes

1 answer

Statement 1: Brookfield viscometer is an example of Coaxial Cylinder Viscometer. Statement 2: Working principle of a Brookfield viscometer: Two coaxial cylinders. Liquid is filled in between them. The viscosity produces torque which is directly proportional to the shear stress.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+1 vote

1 answer

Statement 1: Two pipes are joined using _____ Statement 2: The sealing material between two pipes to be joined is called _____

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+1 vote

1 answer

Statement 1: When an additional connection such as a valve/ tap is to be added, _____ is used. Statement 2: Bents have more pressure drop than elbows.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+2 votes

1 answer

Statement 1: Pulsed Electric field needs to followed by refrigeration storing to increase shelf life and prevent spoilage. Statement 2: Structural changes at cell membrane and inactivation of enzymes, is how high hydrostatic pressure works for the food industry.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+2 votes

1 answer

Statement 1: When several factors for food processing and preservation are applied to one food product, it is called Hurdle technology. Statement 2: Hurdle technology has arisen due to demand of costumers for healthier and more nutritious food items.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+2 votes

1 answer

Statement 1: Sieder-Tate and Dittus-boelter equations imply only to laminar flow conditions. Statement 2: Under laminar conditions, the same equation applies both to Newtonian and Non-Newtonian fluids.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+1 vote

1 answer

Statement 1: Acidic electrolyzed water is non-photochemical process which has a high oxidation capacity and proved as an essential biocide. Statement 2: Chlorine Dioxide has been successfully used as a disinfectant in the food processing industry.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+1 vote

1 answer

Statement 1: In Pulsed Electric field, food is kept between two electrodes and electricity is passed to deactivate microbes. Statement 2: Pulsed Electric field increases shelf life.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+1 vote

1 answer

Statement 1: Hurdle technology is a ‘multi-target preservation’. Statement 2: The main target of food preservation is to help the harmful microorganisms to achieve homeostasis.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+1 vote

1 answer

Statement 1: Cost reduction trend of the food industry often leads manufacturers to forget the health aspect of the food, although health itself is another important trend of the food industry. Statement 2: Food processing industries now-a-days is also looking into energy efficiency methods to process food. Hence it’s an upcoming trend.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+1 vote

1 answer

Statement 1: Advanced Oxidation Processes convert non-biodegradable organic materials into biodegradable organic forms. Statement 2: Advanced Oxidation Processes are non-environmental friendly.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

+2 votes

1 answer

Statement 1: For non-Newtonian fluids, another term called apparent viscosity is used as their viscosity changes with the change in the shear rate. Statement 2: For non-Newtonian fluids, between the transition region, the power number for non-Newtonian fluids is slightly higher than that for Newtonian fluids.

asked Jan 30, 2022 in Food Engineering by Amelia (93.8k points)

...