The fluid forces considered in the Navier Stokes equation are (A) Gravity, pressure and viscous (B) Gravity, pressure and turbulent (C) Pressure, viscous and turbulent (D) Gravity, viscous and turbulent

The fluid forces considered in the Navier Stokes equation are
(A) Gravity, pressure and viscous
(B) Gravity, pressure and turbulent
(C) Pressure, viscous and turbulent
(D) Gravity, viscous and turbulent
by

1 Answer

Answer :

Answer: Option A
by

Related questions

_________ 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

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 following fluid forces are not considered in the Navier￾Stoke's equation? (A) Gravity forces (B) Viscous forces (C) Pressure forces (D) Turbulent forces

Description : Which of the following fluid forces are not considered in the Navier￾Stoke's equation? (A) Gravity forces (B) Viscous forces (C) Pressure forces (D) Turbulent forces

Last Answer : (D) Turbulent forces

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

Capillary tube method of viscosity measurement is based on the (A) Hagen-Poiseuille’s equation (B) Stoke's law (C) Navier-stokes equation (D) None of these

Description : Capillary tube method of viscosity measurement is based on the (A) Hagen-Poiseuille’s equation (B) Stoke's law (C) Navier-stokes equation (D) None of these

Last Answer : (A) Hagen-Poiseuille’s equation

The Navier-Stokes equation deals with the law of conservation of (A) Mass (B) Energy (C) Both (A) & (B) (D) Momentum

Description : The Navier-Stokes equation deals with the law of conservation of (A) Mass (B) Energy (C) Both (A) & (B) (D) Momentum

Last Answer : (D) Momentum

Pick out the wrong statement. (A) A fluid mass is free from shearing forces, when it is made to rotate with a uniform velocity(B) Newton's law of viscosity is not applicable to the turbulent flow of fluidwith linear velocity distribution(C) Laminar flow of viscous liquids is involved in the lubrication of varioustypes of bearings(D) Rise of water in capillary tubes reduces with the increasing diameter ofcapillary tubes

Description : Pick out the wrong statement. (A) A fluid mass is free from shearing forces, when it is made to rotate with a uniform velocit (B) Newton's law of viscosity is not applicable to the ... types of bearings (D) Rise of water in capillary tubes reduces with the increasing diameter of capillary tubes

Last Answer : (B) Newton's law of viscosity is not applicable to the turbulent flow of fluid with linear velocity distribution

For the Stoke's law to be valid in the case of a falling sphere in a fluid, the (A) Reynolds number (based on sphere diameter) should be < 1 (B) Flow around the sphere should be in turbulent region (C) Sphere must be metallic (D) Fluid density should be constant

Description : For the Stoke's law to be valid in the case of a falling sphere in a fluid, the (A) Reynolds number (based on sphere diameter) should be < 1 (B) Flow around the sphere should be in turbulent region (C) Sphere must be metallic (D) Fluid density should be constant

Last Answer : (C) Sphere must be metallic

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

Which of the following forces does not act on a fluid at rest? (A) Viscous force (B) Gravity force (C) Hydrostatic force (D) Surface tension force

Description : Which of the following forces does not act on a fluid at rest? (A) Viscous force (B) Gravity force (C) Hydrostatic force (D) Surface tension force

Last Answer : (A) Viscous force

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

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

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

Pick out the wrong statement. (A) Surface tension of a liquid is because of the difference in magnitude of adhesive & cohesive forces(B) A hydrometer used for the determination of specific gravities of liquidsworks on the principle of buoyant forces(C) In case of unsteady fluid flow, the velocity at any given point does notchange with time(D) Turbulent fluid flow is characterised by the rapid fluctuation ofinstantaneous pressure & velocity at a poin

Description : Pick out the wrong statement. (A) Surface tension of a liquid is because of the difference in magnitude of adhesive & cohesive forces (B) A hydrometer used for the determination of ... Turbulent fluid flow is characterised by the rapid fluctuation of instantaneous pressure & velocity at a poin

Last Answer : (C) In case of unsteady fluid flow, the velocity at any given point does not change with time

Pressure co-efficient is the ratio of pressure forces to __________ forces. (A) Gravity (B) Inertial (C) Viscous (D) None of these

Description : Pressure co-efficient is the ratio of pressure forces to __________ forces. (A) Gravity (B) Inertial (C) Viscous (D) None of these

Last Answer : (B) Inertial

The pressure co-efficient is the ratio of pressure forces to __________ forces. (A) Viscous (B) Inertial (C) Gravity (D) Surface tension

Description : The pressure co-efficient is the ratio of pressure forces to __________ forces. (A) Viscous (B) Inertial (C) Gravity (D) Surface tension

Last Answer : (A) Viscous

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 flow in which __________ force is dominating over the viscosity is called turbulent flow. (A) Elastic (B) Surface tension (C) Viscous (D) Inertia

Description : A flow in which __________ force is dominating over the viscosity is called turbulent flow. (A) Elastic (B) Surface tension (C) Viscous (D) Inertia

Last Answer : Answer: Option D

Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid flow control. It is caused due to (A) Reynold stresses (B) Shear forces (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid flow control. It is caused due to (A) Reynold stresses (B) Shear forces (C) Both (A) & (B) (D) Neither (A) nor (B)

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

At low Reynolds number (A) Viscous forces are unimportant (B) Viscous forces control (C) Viscous forces control and inertial forces are unimportant (D) Gravity forces contro

Description : At low Reynolds number (A) Viscous forces are unimportant (B) Viscous forces control (C) Viscous forces control and inertial forces are unimportant (D) Gravity forces contro

Last Answer : (C) Viscous forces control and inertial forces are unimportant

Reynolds number is the ratio of (A) Viscous forces to gravity forces (B) Inertial forces to viscous forces (C) Viscous forces to inertial forces (D) Inertial forces to gravity forces

Description : Reynolds number is the ratio of (A) Viscous forces to gravity forces (B) Inertial forces to viscous forces (C) Viscous forces to inertial forces (D) Inertial forces to gravity forces

Last Answer : (B) Inertial forces to viscous forces

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

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

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

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

If G is the specific gravity of particles of diameter d, the velocity of settlement V in still water at T°C, according to Stoke's law, is (A) V = 418 (G - 1) d² [(3T + 70)/100] (B) V = 418 (G - 1) d [(3T - 70)/100] (C) V = 418 (G - 1) d² [(2T + 70)/100] (D) V = 418 (G - 1) d 4 [(3T + 70)/100]

Description : If G is the specific gravity of particles of diameter d, the velocity of settlement V in still water  at T°C, according to Stoke's law, is  (A) V = 418 (G - 1) d² [(3T + 70)/100]  (B) V = 418 (G - 1) d [(3T - ... 1) d² [(2T + 70)/100]  (D) V = 418 (G - 1) d 4  [(3T + 70)/100] 

Last Answer : (A) V = 418 (G - 1) d² [(3T + 70)/100] 

The kinematic viscosity of an oil (in stokes) whose specific gravity is 0.95 and viscosity 0.011 poise, is (A) 0.0116 stoke (B) 0.116 stoke (C) 0.0611 stoke (D) 0.611 stoke

Description : The kinematic viscosity of an oil (in stokes) whose specific gravity is 0.95 and viscosity 0.011 poise, is (A) 0.0116 stoke (B) 0.116 stoke (C) 0.0611 stoke (D) 0.611 stoke

Last Answer : Answer: Option A

Euler's number is the ratio of __________ force to pressure force. (A) Inertia (B) Gravity (C) Viscous (D) None of these

Description : Euler's number is the ratio of __________ force to pressure force. (A) Inertia (B) Gravity (C) Viscous (D) None of these

Last Answer : Answer: Option A

The product of mass and acceleration of flowing liquid is called (A) Inertia force (B) Viscous force (C) Gravity force (D) Pressure force

Description : The product of mass and acceleration of flowing liquid is called (A) Inertia force (B) Viscous force (C) Gravity force (D) Pressure force

Last Answer : Answer: Option A

Reynold's number is the ratio of inertia force to (A) Pressure force (B) Elastic force (C) Gravity force (D) Viscous force

Description : Reynold's number is the ratio of inertia force to (A) Pressure force (B) Elastic force (C) Gravity force (D) Viscous force

Last Answer : Answer: Option D

Select the correct statement (A) Weber's number is the ratio of inertia force to elastic force. (B) Weber's number is the ratio of gravity force to surface tension force. (C) Weber's number is the ratio of viscous force to pressure force. (D) Weber's number is the ratio of inertia force to surface tension force.

Description : Select the correct statement (A) Weber's number is the ratio of inertia force to elastic force. (B) Weber's number is the ratio of gravity force to surface tension force. (C) Weber's number ... force to pressure force. (D) Weber's number is the ratio of inertia force to surface tension force.

Last Answer : Answer: Option D

Euler's dimensionless number relates the following (A) Inertial force and gravity (B) Viscous force and inertial force (C) Viscous force and buoyancy force (D) Pressure force and inertial force

Description : Euler's dimensionless number relates the following (A) Inertial force and gravity (B) Viscous force and inertial force (C) Viscous force and buoyancy force (D) Pressure force and inertial force

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 pressure at a point in a fluid will not be same in all the directions when the fluid is (A) Moving (B) Viscous (C) Viscous and static (D) Viscous and moving

Description : The pressure at a point in a fluid will not be same in all the directions when the fluid is (A) Moving (B) Viscous (C) Viscous and static (D) Viscous and moving

Last Answer : Answer: Option D

Fluidised beds are formed, when the (A) Fluid friction is zero (B) Gravity force is less than the fluid friction (C) Pressure forces equal gravity forces (D) Sum of the fluid friction and pressure forces is equal and opposite to gravity forces

Description : Fluidised beds are formed, when the (A) Fluid friction is zero (B) Gravity force is less than the fluid friction (C) Pressure forces equal gravity forces (D) Sum of the fluid friction and pressure forces is equal and opposite to gravity forces

Last Answer : (B) Gravity force is less than the fluid friction

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

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)

When the pipe Reynold's number is 6000, the flow is generally (A) Viscous(B) Laminar(C) Turbulent(D) Transition

Description : When the pipe Reynold's number is 6000, the flow is generally (A) Viscous (B) Laminar (C) Turbulent (D) Transition

Last Answer : (C) Turbulent

The Bernoulli's equation is based on the assumption that (A) There is no loss of energy of the liquid flowing (B) The velocity of flow is uniform across any cross-section of the pipe (C) No force except gravity acts on the fluid (D) All of the above

Description : The Bernoulli's equation is based on the assumption that (A) There is no loss of energy of the liquid flowing (B) The velocity of flow is uniform across any cross-section of the pipe (C) No force except gravity acts on the fluid (D) All of the above

Last Answer : Answer: Option D

A flow in which the viscosity of fluid is dominating over the inertia force is called (A) Steady flow (B) Unsteady flow (C) Laminar flow (D) Turbulent flow

Description : A flow in which the viscosity of fluid is dominating over the inertia force is called (A) Steady flow (B) Unsteady flow (C) Laminar flow (D) Turbulent flow

Last Answer : Answer: Option C

The flow in which the particles of a fluid attain such velocities that varies from point to point in magnitude and direction as well as from instant to instant, is known as (A) One dimensional flow (B) Uniform flow (C) Steady flow (D) Turbulent flow

Description : The flow in which the particles of a fluid attain such velocities that varies from point to point in magnitude and direction as well as from instant to instant, is known as (A) One dimensional flow (B) Uniform flow (C) Steady flow (D) Turbulent flow

Last Answer : Answer: Option D

The force present in a moving liquid is (A) Inertia force (B) Viscous force (C) Gravity force (D) All of these

Description : The force present in a moving liquid is (A) Inertia force (B) Viscous force (C) Gravity force (D) All of these

Last Answer : Answer: Option D

Reynold's number is the ratio of the inertia force to the (A) Surface tension force (B) Viscous force (C) Gravity force (D) Elastic force

Description : Reynold's number is the ratio of the inertia force to the (A) Surface tension force (B) Viscous force (C) Gravity force (D) Elastic force

Last Answer : Answer: Option B

A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke's law. A particle B with diameter 20microns settling in the same oil will have a settling velocity (A) Same as that of A (B) One fourth as that of A (C) Twice as that of A (D) Four times as that of A

Description : A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke's law. A particle B with diameter 20microns settling in the same oil will have a settling velocity (A) ... ) One fourth as that of A (C) Twice as that of A (D) Four times as that of A

Last Answer : (B) One fourth as that of A

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

Isothermal turbulent flow of a fluid results in decrease of its pressure, which depends on the (A) Wall roughness (B) Reynolds number (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Isothermal turbulent flow of a fluid results in decrease of its pressure, which depends on the (A) Wall roughness (B) Reynolds number (C) Both (A) & (B) (D) Neither (A) nor (B)

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

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

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

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

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

The terminal velocity of a sphere setting in a viscous fluid varies as : (a) The Reynolds number (b) The square of its diameter (c) Directly proportional to the viscosity of the fluid (d) Its diameter

Description : The terminal velocity of a sphere setting in a viscous fluid varies as : (a) The Reynolds number (b) The square of its diameter (c) Directly proportional to the viscosity of the fluid (d) Its diameter

Last Answer : (b) The square of its diameter

Euler number is defined as the ratio of inertia force to __________ force. (A) Pressure (B) Elastic (C) Gravity (D) Viscous

Description : Euler number is defined as the ratio of inertia force to __________ force. (A) Pressure (B) Elastic (C) Gravity (D) Viscous

Last Answer : (A) Pressure