Description : Applicability of Bernoulli's equation is limited to a/an __________ fluid, that does not exchange shaft work with the surroundings. (A) Incompressible (B) Non-viscous (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) and (B)
Description : An ideal fluid is (A) Frictionless & incompressible (B) One, which obeys Newton's law of viscosity (C) Highly viscous (D) None of these
Last Answer : (A) Frictionless & incompressible
Description : A fluid is said to be ideal, if it is (A) Incompressible (B) Viscous and incompressible (C) Inviscous and compressible (D) Inviscous and incompressible
Last Answer : Answer: Option D
Description : The normal stress is the same in all directions at a point in a fluid, when the fluid is (A) Non-viscous (B) Incompressible (C) Both (A) and (B) (D) Having no motion of one fluid layer relative to the other
Last Answer : (D) Having no motion of one fluid layer relative to the other
Description : Which of the following assumptions enables the Euler's equation of motion to be integrated? (A) The fluid is incompressible (B) The fluid is non-viscous (C) The continuity equation is satisfied (D) The flow is rotational and incompressible
Last Answer : (A) The fluid is incompressible
Description : Bernoulli's principle states that, for streamline motion of an incompressible non-viscous fluid: A. the pressure at any part + the kinetic energy per unit volume = constant B. the kinetic ... + the kinetic energy per unit volume + the potential energy per unit volume = constant
Last Answer : the pressure at any part + the kinetic energy per unit volume + the potential energy per unit volume = constant
Description : The Euler's equation for the motion of liquids is based upon the assumption that (A) The fluid is non - viscous, homogeneous and incompressible (B) The velocity of flow is uniform over the section (C) The flow is continuous, steady and along the stream line (D) All of the above
Description : The internal energy of an incompressible fluid depends upon its (A) Pressure (B) Temperature (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : (B) Temperature
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
Last Answer : (A) Newtonian
Description : A flow in which the volume of a fluid and its density does not change during the flow is called _________ flow. (A) Incompressible (B) Compressible (C) Viscous (D) None of these
Last Answer : Answer: Option A
Description : Bernoulli's equation is not applicable, when the flow is (A) Irrotational (B) Incompressible (C) Viscous (D) All (A), (B) & (C
Last Answer : (D) All (A), (B) & (C)
Description : In an incompressible fluid, the density is (A) Greatly affected by moderate changes in pressure (B) Greatly affected only by moderate changes in temperature (C) Not affected with moderate change in temperature & pressure (D) Sensible to changes in both temperature & pressure
Last Answer : (C) Not affected with moderate change in temperature & pressure
Description : For an incompressible fluid, the __________ is a function of both pressure as well as temperature. (A) Internal energy (B) Enthalpy (C) Entropy (D) All (A), (B) & (C)
Last Answer : (B) Enthalpy
Description : Bernoulli's equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli's equation? A. Fluid flow is frictionless & irrotational. B. Fluid flow is ... A, C, D (B) B, D, E (C) A, B, E (D) A, D, E
Last Answer : (C) A, B, E
Description : In an incompressible flow of fluid, the fluid (A) Temperature remains constant (B) Compressibility is greater than zero (C) Density does not change with pressure & temperature (D) Is frictionless
Last Answer : (C) Density does not change with pressure & temperature
Description : The normal stress is the same in all directions at a point in a fluid, only when the fluid (A) Is at rest & has zero viscosity (B) Is frictionless (C) Fluid layer has no motion relative to an adjacent layer of fluid (D) is incompressible & frictionless
Last Answer : (D) is incompressible & frictionless
Description : Signal normally used to study non-ideal flow by stimulus response technique is __________ input. (A) Pulse (B) Step (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) & (B)
Description : The single parameter model proposed for describing non-ideal flow is the __________ model. (A) Tank in series (B) Dispersion (C) Both (A) & (B) (D) Neither (A) nor (B)
Description : The Stoke's stream function applies to the (A) Irrotational flow only (B) Ideal/non i viscous fluids only (C) Cases of axial symmetry (D) None of these
Last Answer : (C) Cases of axial symmetry
Description : Navier-Stokes equation is useful in the analysis of __________ fluid flow problems. (A) Non-viscous (B) Viscous (C) Turbulent (D) Rotational
Last Answer : (B) Viscous
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 : The terminal velocity of a small sphere settling in a viscous fluid varies as the (A) First power of its diameter (B) Inverse of the fluid viscosity (C) Inverse square of the diameter (D) Square of the difference in specific weights of solid & fluid
Last Answer : (B) Inverse of the fluid viscosity
Description : Forces acting on a particle settling in fluid are __________ forces. (A) Gravitational & buoyant (B) Centrifugal & drag (C) Gravitational or centrifugal buoyant drag (D) External, drag & viscous
Last Answer : (C) Gravitational or centrifugal buoyant drag
Description : In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow? (A) ... level is maintained (D) Low velocity flow of a highly viscous liquid through a hydraulically smooth pipe
Last Answer : (B) Water flow in the suction and discharge pipe of a reciprocating pump
Description : Pick out the correct statement. (A) Fanning friction factor is inversely proportional to Reynolds number always (B) The property of a randomly packed bed (with raschig rings) is given by the ratio of the ... the ratio of the speed of the fluid to that of sound in the fluid under conditions of flow
Last Answer : (D) Mach number is given by the ratio of the speed of the fluid to that of sound in the fluid under conditions of flow
Description : The co-efficient of drag and lift for an incompressible fluid depends on the (A) Reynolds number (B) Froude number (C) Mach number (D) All (A), (B) and (C)
Last Answer : (A) Reynolds numbe
Description : For ideally incompressible fluid, the Mach number will be (A) 1.5 (B) 1 (C) 0 (D) 5
Last Answer : (B) 1
Description : For one dimensional flow of an incompressible fluid in unsteady state in x-direction, the continuity equation is given by (A) ∂u/∂x = 0 (B) ∂(ρu)/∂x = 0 (C) (∂u/∂x) = - (∂ρ/∂t) (D) ∂ρ/∂t = 0
Last Answer : (A) ∂u/∂x = 0
Description : Select the wrong statement pertaining to flow of an incompressible fluid through a Venturimeter. (A) For frictionless flow, the fluid pressure entering the venturi meter will be exactly equal ... than an orificemeter (D) Venturimeter incurs less power loss compared to an equivalent orificemeter
Last Answer : (C) Venturimeter occupies less space than an orificemeter
Description : A fluid is the one, which (A) Cannot remain at rest under the action of shear force (B) Continuously expands till it fills any container (C) Is incompressible (D) Permanently resists distortion
Last Answer : (A) Cannot remain at rest under the action of shear force
Description : In a fully turbulent flow (Re > 10 5 ) in a pipe of diameter 'd', for a constant pressure gradient, the dependence of volumetric flow rate of an incompressible fluid is (A) d (B) d 2 (C) d 2.5 (D) d
Last Answer : (C) d 2.5
Description : Upto what value of 'Mach number', a fluid may be considered as incompressible? (A) 0.03 (B) 0.3 (C) 3 (D) 10
Last Answer : (D) 10
Description : Where does the maximum stress occur in case of laminar flow of incompressible fluid in a closed conduit of diameter 'd'? (A) At the centre (B) At d/4 from the wall (C) At the wall (D) At d/8 from the wall
Last Answer : (C) At the wall
Description : A fluid element has a velocity V = -y 2 . xi + 2yx 2 . j. The motion at (x, y) = (1/√2, 1) is (A) Rotational and incompressible (B) Rotational and compressible (C) Irrotational and compressible (D) Irrotational and incompressible
Last Answer : (B) Rotational and compressible
Description : A fluid is a substance, that (A) Has to be kept in a closed container (B) Is almost incompressible (C) Has zero shear stress (D) Flows when even a small shear is applied to it
Last Answer : (D) Flows when even a small shear is applied to it
Description : For an incompressible fluid, the bulk modulus of elasticity is (A) 5 kg/m3 (B) ∞ N/m2 (C) 1 N (D) 0 N/m
Last Answer : (B) ∞ N/m2
Description : Mach number is defined as the ratio of the local flow velocity to the sonic velocity in the fluid. For what value of Mach number, the gases are considered incompressible? (A) < 0.3 (B) > 3 (C) 50 (D) 1
Last Answer : (A) < 0.3
Description : __________ flow means the flow of incompressible fluid with no shear. (A) Potential (B) Streamline (C) Creep (D) Boundary layer
Last Answer : (A) Potential
Description : For turbulent flow of an incompressible fluid through a pipe, the flow rate ‘Q’ is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent 'n' is (A) 1 (B) 0 (C) < 1 (D) > 1
Last Answer : (C) < 1
Description : In deriving Bernoulli's equation, fluid is assumed to be (A) Incompressible, frictionless, steady, along a streamline (B) Uniform, steady, incompressible, along a streamline (C) Steady, density being pressure dependent, frictionless (D) None of these
Last Answer : (A) Incompressible, frictionless, steady, along a streamline
Description : With the increase in depth, the hydrostatic pressure in an un-accelerated incompressible fluid (in a constant gravitational field) (A) Decreases (B) Increases linearly (C) Increases exponentially (D) Remain constant
Last Answer : (B) Increases linearly
Description : At Pr > 1, conduction in an ordinary fluid flowing through a heated pipe is limited to the (A) Buffer zone (B) Turbulent core (C) Both (A) and (B) (D) Viscous sub-layer
Last Answer : (D) Viscous sub-layer
Description : The normal stress is same in all directions at a point in a fluid (A) Only when the fluid is frictionless (B) Only when the fluid is incompressible and has zero viscosity (C) When there ... to an adjacent layer (D) Irrespective of the motion of one fluid layer relative to an adjacent layer
Last Answer : Answer: Option C
Description : The normal stress in a fluid will be constant in all directions at a point only if (A) It is incompressible (B) It has uniform viscosity (C) It has zero viscosity (D) It is at rest
Description : The total energy of each particle at various places in the case of perfect incompressible fluid flowing in continuous stream (A) Keeps on increasing (B) Keeps on decreasing (C) Remain constant (D) May increase/decrease
Description : An ideal nozzle design aims at (A) Minimising wall friction (B) Suppressing boundary layer separation (C) Both (A) & (B) (D) Neither (A) nor (B)
Description : If an ideal solution is formed by mixing two pure liquids in any proportion, then the __________ of mixing is zero (A) Enthalpy (B) Volume (C) Both 'a' & 'b' (D) Neither 'a' nor 'b'
Last Answer : (C) Both 'a' & 'b'
Description : Entropy of an ideal gas depends upon its (A) Pressure (B) Temperature (C) Both (A) & (B) (D) Neither (A) nor (B)
Description : The heat capacities for the ideal gas state depend upon the (A) Pressure (B) Temperature (C) Both (A) & (B) (D) Neither (A) nor (B)
Description : If two pure liquid constituents are mixed in any proportion to give an ideal solution, there is no change in (A) Volume (B) Enthalpy (C) Both (A) & (B) (D) Neither (A) nor (B)