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

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
by

1 Answer

Answer :

Answer: Option A
by

Related questions

A fluid is said to be ideal, if it is (A) Incompressible (B) Viscous and incompressible (C) Inviscous and compressible (D) Inviscous and 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

Which of the following statement is correct? (A) In a compressible flow, the volume of the flowing liquid changes during the flow (B) A flow, in which the volume of the flowing liquid does not change, is called incompressible flow (C) When the particles rotate about their own axes while flowing, the flow is said to be rotational flow (D) All of the above

Description : Which of the following statement is correct? (A) In a compressible flow, the volume of the flowing liquid changes during the flow (B) A flow, in which the volume of the flowing liquid does not change, ... their own axes while flowing, the flow is said to be rotational flow (D) All of the above

Last Answer : Answer: Option D

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 steady. C. Fluid flow is uniform & turbulent. D. Fluid is compressible. E. Fluid is incompressible. (A) A, C, D (B) B, D, E (C) A, B, E (D) A, D, E

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

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 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

Last Answer : Answer: Option D

A straight line is obtained on plotting reciprocal of filtration rate vs. the volume of filtrate for __________ flow of filtrate. (A) Compressible cakes and laminar (B) Incompressible cake and laminar (C) Compressible cake and turbulent (D) Incompressible cake and turbulent

Description : A straight line is obtained on plotting reciprocal of filtration rate vs. the volume of filtrate for __________ flow of filtrate. (A) Compressible cakes and laminar (B) Incompressible cake and laminar (C) Compressible cake and turbulent (D) Incompressible cake and turbulent

Last Answer : (B) Incompressible cake and laminar

04. All the gases are considered to have compressible flow and all the liquids are considered to have incompressible flow. A) Correct B) Incorrect

Description : 04. All the gases are considered to have compressible flow and all the liquids are considered to have incompressible flow. A) Correct B) Incorrect

Last Answer : A

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 energy per unit volume + the potential energy per unit volume = constant C. the pressure at any part + the potential energy per unit volume = constanD. the pressure at any part + the kinetic energy per unit volume + the potential energy per unit volume = constantt

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

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

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

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

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

If in a flow field, between any two points, then the flow must be (A) Steady, incompressible, irrotational (B) Steady, compressible, irrotational (C) Steady, compressible and along a streamline

Description : If in a flow field, between any two points, then the flow must be (A) Steady, incompressible, irrotational (B) Steady, compressible, irrotational (C) Steady, compressible and along a streamline

Last Answer : (A) Steady, incompressible, irrotational

Potential flow is the flow of (A) Compressible fluids with shear (B) Compressible fluids with no shear (C) Incompressible fluids with shear (D) Incompressible fluids with no shear

Description : Potential flow is the flow of (A) Compressible fluids with shear (B) Compressible fluids with no shear (C) Incompressible fluids with shear (D) Incompressible fluids with no shear

Last Answer : (D) Incompressible fluids with no shear

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

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

Cohesive soils are generally (A) Plastic and also compressible (B) Elastic and also compressible (C) Plastic but incompressible (D) None of these

Description : Cohesive soils are generally (A) Plastic and also compressible (B) Elastic and also compressible (C) Plastic but incompressible (D) None of these

Last Answer : (A) Plastic and also compressible

Water is __________ liquid. (A) A compressible (B) An incompressible (C) Both A and B (D) None of these

Description : Water is __________ liquid. (A) A compressible (B) An incompressible (C) Both A and B (D) None of these

Last Answer : Answer: Option B

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

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

An ideal fluid is (A) Non-viscous (B) Incompressible (C) Both (A) & (B) (D) Neither (A) & (B

Description : An ideal fluid is (A) Non-viscous (B) Incompressible (C) Both (A) & (B) (D) Neither (A) & (B

Last Answer : (C) Both (A) & (B)

An ideal fluid is (A) Frictionless & incompressible (B) One, which obeys Newton's law of viscosity (C) Highly viscous (D) None of these

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

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)

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)

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 total volume to the volume of voids in the bed (C) Mach number in an incompressible fluid is always unity (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 : 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

Bernoulli's equation is not applicable, when the flow is (A) Irrotational (B) Incompressible(C) Viscous(D) All (A), (B) & (C

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)

A point, in a compressible flow where the velocity of fluid is zero, is called (A) Critical point (B) Vena contractaC) Stagnation point (D) None of these

Description : A point, in a compressible flow where the velocity of fluid is zero, is called (A) Critical point (B) Vena contracta C) Stagnation point (D) None of these

Last Answer : Answer: Option C

Practical fluids (A) Are viscous (B) Possess surface tension (C) Are compressible(D) Possess all the above properties

Description : Practical fluids (A) Are viscous (B) Possess surface tension (C) Are compressible (D) Possess all the above properties

Last Answer : Answer: Option D

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

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

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. (du/dy) n the value of 'n' for pseudoplastic and Dilatant fluid are < 1 and >1 respectively (C) Shear stress for Newtonian fluid is proportional to the rate of shear in the direction perpendicular to motion (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) 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

The Mach number for hypersonic flow of compressible fluid is (A) 1 (B) > 1 (C) > 4 (D) < 2

Description : The Mach number for hypersonic flow of compressible fluid is (A) 1 (B) > 1 (C) > 4 (D) < 2

Last Answer : (C) > 4

Fanning friction factor equation applies to the __________ fluid flow. (A) Non-isothermal condition of (B) Compressible (C) Both (A) and (B) (D) Neither (A) nor (B)

Description : Fanning friction factor equation applies to the __________ fluid flow. (A) Non-isothermal condition of (B) Compressible (C) Both (A) and (B) (D) Neither (A) nor (B)

Last Answer : (D) Neither (A) nor (B)

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

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

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

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

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 to that leaving the Venturimeter(B) Discharge of fluid through a Venturimeter depends upon the gagedifference irrespective of the orientation of Venturimeter(C) Venturimeter occupies less space than an orificemeter(D) Venturimeter incurs less power loss compared to an equivalentorificemeter

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

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) d2(C) d2.5(D) d

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

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

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

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

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

__________ flow means the flow of incompressible fluid with no shear. (A) Potential (B) Streamline (C) Creep (D) Boundary layer

Description : __________ flow means the flow of incompressible fluid with no shear. (A) Potential (B) Streamline (C) Creep (D) Boundary layer

Last Answer : (A) Potential

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

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

The bulk modulus of elasticity (A) Has the dimensions of 1/pressure (B) Increases with pressure (C) Is large when fluid is more compressible (D) Is independent of pressure and viscosity

Description : The bulk modulus of elasticity (A) Has the dimensions of 1/pressure (B) Increases with pressure (C) Is large when fluid is more compressible (D) Is independent of pressure and viscosity

Last Answer : Answer: Option B

Which one of the following statements is correct ? a) For water at 100o Celsius at sea level, the vapour pressure is equal to atmospheric pressure b) Surface energy (or tension) is caused by the force of adhesion between liquid molecules c) Viscosity of a fluid is the property exhibited by it both in static and in dynamic conditions d) Air is 50,000 times more compressible than water

Description : Which one of the following statements is correct ? a) For water at 100o Celsius at sea level, the vapour pressure is equal to atmospheric pressure b) Surface energy (or tension) is caused by ... it both in static and in dynamic conditions d) Air is 50,000 times more compressible than water

Last Answer : c) Viscosity of a fluid is the property exhibited by it both in static and in dynamic conditions

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) Discharge of water by a centrifugal pump being run at a constant rpm (B) Water flow in the suction and discharge pipe of a reciprocating pump (C) Water discharge from a vertical vessel in which constant level is maintained (D) Low velocity flow of a highly viscous liquid through a hydraulically smooth pipe

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

_________ fluid force is not considered in the Navier-Stokes equation. (A) Turbulent (B) Viscous (C) Gravity (D) Pressure

Description : _________ fluid force is not considered in the Navier-Stokes equation. (A) Turbulent (B) Viscous (C) Gravity (D) Pressure

Last Answer : (A) Turbulent

What is constant for a substance that is considered “incompressible”?  A. Specific volume of density  B. Pressure  C. Temperature  D. All of the above

Description : What is constant for a substance that is considered “incompressible”?  A. Specific volume of density  B. Pressure  C. Temperature  D. All of the above

Last Answer : Specific volume of density

When a small spherical body falls in a viscous fluid, its speed increases first, then deceases and eventually it acquires a constant speed called the terminal speed. The terminal speed depends upon (a) The density and viscosity of the fluid (b) The density of the body (c) The diameter of the body (d) All the above parameters

Description : When a small spherical body falls in a viscous fluid, its speed increases first, then deceases and eventually it acquires a constant speed called the terminal speed. The terminal speed depends upon (a) The ... ) The density of the body (c) The diameter of the body (d) All the above parameters

Last Answer : Ans:(d)

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 is no motion of one fluid layer relative to an adjacent layer (D) Irrespective of the motion of one fluid layer relative to an adjacent 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

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 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

Last Answer : Answer: Option D

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 : 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

Last Answer : Answer: Option C

Pick up the incorrect statement from the following: (A) Compaction has no effect on the structure of a soil (B) Permeability decreases with increase in the dry density of a compacted soil (C) A wet side compacted soil is more compressible than a dry side compacted soil (D) Dry side compaction soils swell more when given access to moisture

Description : Pick up the incorrect statement from the following: (A) Compaction has no effect on the structure of a soil (B) Permeability decreases with increase in the dry density of a compacted soil (C) ... a dry side compacted soil (D) Dry side compaction soils swell more when given access to moisture

Last Answer : (A) Compaction has no effect on the structure of a soil

Navier-Stokes equation is useful in the analysis of __________ fluid flow problems. (A) Non-viscous (B) Viscous (C) Turbulent (D) Rotational

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

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 fluid velocity in a circular pipe flow is maximum at the centre of the pipe (C) Navier-Stokes equation is applicable to the analysis of viscous flows

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

Which of the fluid forces are not considered in the Reynold's equation of flow? (A) Viscous forces (B) Turbulent forces (C) Pressure forces (D) Compressibility forces

Description : Which of the fluid forces are not considered in the Reynold's equation of flow? (A) Viscous forces (B) Turbulent forces (C) Pressure forces (D) Compressibility forces

Last Answer : (D) Compressibility forces

Turbulent flow generally occurs for cases involving (A) Highly viscous fluid (B) Very narrow passages (C) Very slow motion (D) None of these

Description : Turbulent flow generally occurs for cases involving (A) Highly viscous fluid (B) Very narrow passages (C) Very slow motion (D) None of these

Last Answer : (D) None of these

Mach number is important in a fluid flow problem, when the inertia and __________ forces predominate. (A) Elastic (B) Viscous (C) Gravity (D) None of these

Description : Mach number is important in a fluid flow problem, when the inertia and __________ forces predominate. (A) Elastic (B) Viscous (C) Gravity (D) None of these

Last Answer : (A) Elastic

Mach number is important in a fluid flow problem, when the inertia and __________ forces predominate. (A) Elastic (B) Viscous (C) Gravity (D) None of these

Description : Mach number is important in a fluid flow problem, when the inertia and __________ forces predominate. (A) Elastic (B) Viscous (C) Gravity (D) None of these

Last Answer : A) Elastic