Description : Rubber latex is an example of a __________ fluid. (A) Pseudo plastic (B) Bingham plastic (C) Dilatent (D) Newtonian
Last Answer : (A) Pseudo plastic
Description : Sewage sludge is an example of the __________ fluid. (A) Bingham plastic (B) Newtonian (C) Pseudo plastic (D) Dilatent
Last Answer : (A) Bingham plastic
Description : Quicksand is an example of a __________ fluid. (A) Bingham plastic (B) Dilatant (C) Newtonian (D) Pseudo plastic
Last Answer : (B) Dilatant
Description : Paper pulp is an example of __________ fluid. (A) Dilatant (B) Bingham plastic (C) Newtonian (D) Pseudo-plastic
Last Answer : (B) Bingham plastic
Description : Sewage sludge is __________ type of non-Newtonian fluid. (A) Dilatant (B) Bingham plastic (C) Pseudo plastic (D) None of these
Description : The fluid velocity varies as the cube of the cylindrical pipe diameter in case of steady state laminar flow at constant pressure drop for __________ fluid. (A) Newtonian (B) Pseudo-plastic (C) Dilatent (D) Bingham plastic
Last Answer : (B) Pseudo-plastic
Description : The fluid velocity varies as the square root of the cylindrical pipe diameter in case of steady state laminar flow at constant pressure drop of __________ fluid. (A) Dilatent (B) Pseudo-plastic (C) Bingham plastic (D) Newtonian
Last Answer : (A) Dilatent
Description : Toothpaste is a (A) Bingham plastic (B) Pseudo-plastic (C) Newtonian liquid (D) Dilatent
Last Answer : (D) Dilatent
Description : An ideal plastic substance indicates no deformation, when stressed upto yield stress, but behaves like a Newtonian fluid beyond yield stress. Which of the following is an ideal plastic? (A) Sewage sludge (B) Rubber latex (C) Blood (D) Sugar solution
Last Answer : (A) Sewage sludge
Description : Non-colloidal solution is an example of the __________ fluid. (A) Non-Newtonian (B) Newtonian (C) Dilatent (D) Pseudo-plastic
Last Answer : (B) Newtonian
Description : The fluid velocity varies as the square of the cylindrical pipe diameter, in case of steady state laminar flow at constant pressure drop, for __________ fluid. (A) Newtonian (B) Dilatant (C) Pseudo-plastic (D) Non-Newtonian
Last Answer : (A) Newtonian
Description : Which of the following is a Newtonian fluid? (A) Rubber latex (B) Sewage sludge (C) Quicksand (D) Non-colloidal solution
Last Answer : (D) Non-colloidal solution
Description : The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a __________ fluid. (A) Bingham (B) Newtonian (C) Perfect (D) None of these
Description : The velocity profile for a Bingham plastic fluid flowing (under laminar conditions) in a pipe is (A) Parabolic (B) Flat (C) Flat near the wall and parabolic in the middle (D) Parabolic near the wall and flat in the middle
Last Answer : (D) Parabolic near the wall and flat in the middle
Description : . Enamels and paints are generally __________ fluid. (A) Rheopectic (B) Pseudo-plastic (C) Thixotropic (D) Dilatant
Description : . A fluid which has a linear relationship between the magnitude of applied shear-stress and the resulting rate of deformation is called a/an __________ fluid. (A) Newtonian (B) Non-Newtonian (C) Ideal (D) Incompressible
Description : A fluid whose apparent viscosity increases with shear rate is termed as the __________ fluid. (A) Newtonian (B) Viscous (C) Dilatant (D) Non-viscous
Last Answer : (C) Dilatan
Description : For laminar flow of Newtonian fluid in a circular pipe, the velocitydistribution is a function of the distance 'd' measured from the centre line of the pipe, and it follows a __________ relationship. (A) Logarithmic (B) Parabolic (C) Hyperbolic (D) Linear
Last Answer : (B) Parabolic
Description : A fluid is termed as the Newtonian fluid, when the shear stress is __________ the velocity gradient. (A) Independent of (B) Inversely proportional to (C) Directly proportional to (D) None of these
Last Answer : (C) Directly proportional to
Description : A Bingham fluid of viscosity μ = 10 Pa.s and yield stress, τ0 = 10 KPa, is shared between flat parallel plates separated by a distance of 10 -3 m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is (A) 10 KPa (B) 20 KPa (C) 30 KPa (D) 40 KPa
Last Answer : (B) 20 KPa
Description : Water is a __________ fluid. (A) Real (B) Ideal (C) Newtonian (D) Non-Newtonian
Last Answer : Answer: Option C
Description : Gutta percha rubber is (A) Soft & tacky at room temperature (B) An isomer of natural rubber (C) A thermosetting resin (D) Recovered by coagulation of rubber latex
Last Answer : (B) An isomer of natural rubber
Description : Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex? (A) Ammonium alum (B) Potassium alum (C) Both ‘a’ & ‘b’ (D) Neither ‘a’ nor ‘b
Last Answer : (C) Both ‘a’ & ‘b
Description : Ultracentrifuges running at speeds upto 100000 rpm is normally used for the (A) Separation of isotopes based on their density or molecular weights difference (B) Concentration of rubber latex (C) Separation of cream from milk (D) Dewaxing of lubricating oil
Last Answer : (A) Separation of isotopes based on their density or molecular weights difference (B) Conc
Description : Which of the following is used for the concentration of rubber latex? (A) Agitated film evaporator (B) Long tube vertical evaporator (C) Short tube evaporator (D) Calandria
Last Answer : (A) Agitated film evaporator
Description : The ratio of average fluid velocity to the maximum velocity in case of laminar flow of a Newtonian fluid in a circular pipe is (A) 0.5 (B) 1 (C) 2 (D) 0.66
Last Answer : (A) 0.5
Description : Pick out the wrong statement pertaining to fluid flow. (A) The ratio of average velocity to the maximum velocity for turbulent flow of Newtonian fluid in circular pipes is 0.5 (B) The Newtonian ... at the centre of the pipe (C) Navier-Stokes equation is applicable to the analysis of viscous flows
Last Answer : (A) The ratio of average velocity to the maximum velocity for turbulent flow of Newtonian fluid in circular pipes is 0.5
Description : Pick out the wrong statement. (A) The shear stress at the pipe (dia = D, length = L) wall in case of laminar flow of Newtonian fluids is (D/4L). ∆p (B) In the equation, T. gc = k. ... to motion (D) With increase in the Mach number >0.6, the drag co-efficient decreases in case of compressible fluids
Last Answer : (D) With increase in the Mach number >0.6, the drag co-efficient decreases in case of compressible fluids
Description : Pick out the wrong statement. (A) Momentum transfer in laminar flow results from velocity gradient (B) A fluid in equilibrium is not free from shear stress (C) The viscosity of a non-Newtonian fluid is a function of temperature only (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : Laminar flow of a Newtonian fluid ceases to exist, when the Reynolds number exceeds (A) 4000 (B) 2100 (C) 1500 (D) 3000
Last Answer : (B) 2100
Description : Power required for mixing Newtonian fluids is a function of the (A) Speed of impeller, diameter of impeller & viscosity (B) Density & viscosity of fluid only (C) Density of fluid, viscosity of fluid & impeller dia only (D) None of these
Last Answer : (D) None of these
Description : In power law, ζ = [A (du/dy) 2 + B] then the fluid is (A) Newtonian (B) Dilatant (C) Thixotropic (D) Rheopectic
Description : For laminar flow of Newtonian fluids through a circular pipe, for a given pressure drop and length & diameter of pipe, the velocity of fluid is proportional to (where, μ = fluid viscosity ) (A) μ (B) 1/μ (C) √μ (D) 1/√μ
Last Answer : (B) 1/μ
Description : Pick out the correct statement. (A) Human blood is a Newtonian fluid (B) A Newtonian fluid obeys Newton's law of cooling (C) For a non-Newtonian fluid, a straight line passes through the origin in a plot between shear stress and shear gradien
Last Answer : (B) A Newtonian fluid obeys Newton's law of cooling
Description : A Newtonian fluid is that (A) Which follows Newton's law of motion (B) Which needs a minimum shear, before it starts deforming (C) For which shear & deformation are related as T = µ (∂u/∂y) (D) None of these
Last Answer : (C) For which shear & deformation are related as T = µ (∂u/∂y)
Description : In case of turbulent flow of a Newtonian fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity) (A) Vavg (B) 1.2 Vavg (C) 1.5 Vavg (D) 1.8 Vavg
Last Answer : (B) 1.2 Vavg
Description : Pick out the correct statement pertaining to transition/ entrance length in fluid flow. (A) The length of entrance region of pipe, in which full development of fluid flow takes place such that velocity profile does not change ... pipe of diameter 'd' is equal to 50 D (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : For turbulent flow of Newtonian fluid in a circular cross-section pipe, the ratio of maximum to average fluid velocity is (A) 0.5 (B) 1 (C) 0.66 (D) < 0.5
Last Answer : (B) 1
Description : For a given fluid, as the pipe diameter increases, the pumping cost (A) Decreases (B) Increases (C) Remains the same (D) May increase or decrease, depending upon whether the fluid is Newtonian or non-Newtonian
Last Answer : (A) Decreases
Description : What is a good device to use for obtaining viscosity data for a non-Newtonian fluid?
Last Answer : Consider a rotational viscometer. It will measure the shear rate applied and the subsequent viscosity at the same time. You can also vary the temperature and time the stresses are applied ... shows that this product exhibits a marked shear thinning viscosity profile over the test conditions.
Description : With increase in the shear rate, the apparent viscosity of pseudo-plastic fluids (A) Increases (B) Decreases (C) Remain same (D) May increase or decrease; depends on the magnitude of shear rate
Last Answer : (B) Decreases
Description : The latex of which plant is used commercially? (1) Papaya plant (2) Sial kanta plant (3) Rubber plant (4) Banyan tree
Last Answer : (3) Rubber plant Explanation: Natural rubber is harvested mainly in the form of the latex from the rubber tree. The latex is a sticky, milky colloid drawn off by making incisions in the bark ... in a process called "tapping". The latex then is refined into rubber ready for commercial processing.
Description : Rubber is a product of a)Fibre b)Latex c) Resin d) Gum
Last Answer : b)Latex
Description : The latex of which plant is used commercially ? (1) Papaya plant (2) Sial kanta plant (3) Rubber plant (4) Banyan tree
Last Answer : Rubber plant
Description : 16. The shear stress-strain graph for a Non-Newtonian fluid is a curve. A) Correct B) Incorrect
Last Answer : A
Description : A fluid whose viscosity does not change with the rate of deformation or shear strain is known as (A) Real fluid (B) Ideal fluid (C) Newtonian fluid (D) Non-Newtonian fluid
Description : The stress-strain relation of the Newtonian fluid is (A) Linear (B) Parabolic (C) Hyperbolic (D) Inverse type
Last Answer : Answer: Option A
Description : A fluid having no viscosity is known as (A) Real fluid (B) Ideal fluid (C) Newtonian fluid (D) Non-Newtonian fluid
Last Answer : Answer: Option B
Description : The shear stress-strain graph for a Newtonian fluid is a (A) Straight line (B) Parabolic curve (C) Hyperbolic curve (D) Elliptical
Description : A fluid which obeys the Newton's law of viscosity is termed as (A) Real fluid (B) Ideal fluid (C) Newtonian fluid (D) Non-Newtonian fluid