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
Description : Ratio of inertial forces to surface tension forces is called the __________ number. (A) Euler (B) Froude (C) Mach (D) Weber
Last Answer : (D) Weber
Description : The ratio of inertial forces to viscous forces is called the __________ number. (A) Weber (B) Mach (C) Froude (D) Reynold
Last Answer : (D) Reynold
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
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
Description : The ratio of inertial forces to elastic forces is called the __________ number. (A) Reynolds (B) Mach (C) Euler (D) Weber
Last Answer : (B) Mach
Description : The ratio of inertial forces to gravity forces is called the __________ number. (A) Mach (B) Froude (C) Euler (D) Weber
Last Answer : (B) Froude
Description : The ratio of the inertia force to the __________ is called Euler's number. (A) Pressure force (B) Elastic force (C) Surface tension force (D) Viscous force
Last Answer : Answer: Option A
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
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
Description : A flow in which __________ force is dominating over the viscosity is called turbulent flow. (A) Elastic (B) Surface tension (C) Viscous (D) Inertia
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
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
Description : Froude's number is the ratio of inertia force to (A) Pressure force (B) Elastic force (C) Gravity force (D) Surface tension force
Last Answer : Answer: Option C
Description : Reynold's number is the ratio of inertia force to (A) Pressure force (B) Elastic force (C) Gravity force (D) Viscous 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
Description : Rain drops falling through atmospheric air attain limited terminal velocity, because of (A) Upward thrust due to air (B) Viscous force exerted by air (C) Surface tension effects of water (D) Force of gravity
Last Answer : Option B
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
Description : For similarity, in addition to models being geometrically similar to prototype, the following in both cases should also be equal (A) Ratio of inertial force to force due to viscosity (B) ... the four ratios of inertial force to force due to viscosity, gravitation, surface tension, and elasticity
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
Last Answer : A) Elastic
Description : A spherical particle is falling slow in a viscous liquid such that Reynolds number is less than 1. Which statement is correct for this situation? (A) Inertial and drag forces are important (B) Drag ... forces are important (C) Drag force and gravitational forces are important (D) None of the above
Last Answer : (B) Drag, gravitational and buoyancy forces are important
Description : Euler's number is the ratio of __________ force to pressure force. (A) Inertia (B) Gravity (C) Viscous (D) None of these
Description : If Reynolds number is greater than 1, then the (A) Viscous force is larger than the inertia force (B) Inertia force is larger than the viscous force (C) Inertia force is larger than the surface tension force (D) Inertia force is larger than the gravitational force
Last Answer : (B) Inertia force is larger than the viscous force
Description : At high Reynolds number (A) Inertial forces control and viscous forces are unimportant (B) Viscous forces predominate (C) Inertial forces are unimportant and viscous forces control (D) None of these
Last Answer : (A) Inertial forces control and viscous forces are unimportant
Description : Ratio of pressure and inertia force gives __________ number. (A) Weber (B) Mach (C) Euler (D) Froude
Last Answer : (C) Euler
Description : Lead ball falls through water more slowly than through air because A. The value of ‘g’ is less in water B. Density of air is less than that of water C. Of the viscous force in water D. Of the surface tension of water
Last Answer : ANSWER: C
Description : _________ fluid force is not considered in the Navier-Stokes equation. (A) Turbulent (B) Viscous (C) Gravity (D) Pressure
Last Answer : (A) Turbulent
Description : The ratio of pressure forces to inertial forces is called the __________ number. (A) Froude (B) Euler (C) Reynold (D) Mach
Last Answer : (B) Euler
Description : The water, retained by the soil in capillary pores (micropores), against gravity (-1/3 to - 31 bar) by the force of surface tension
Last Answer : Ans.Capillary water
Description : Ail oil drop spreads over water because (1) oil is lighter than water (2) oil is more viscous (3) oil does not mix with water (4) surface tension of oil is much smaller than that of water
Last Answer : (4) surface tension of oil is much smaller than that of water Explanation: Surface tension is a contractive tendency of the surface of a liquid that allows it to resist an external force. It is ... is caused by cohesion of similar molecules, and is responsible for many of the behaviors of liquids.
Description : Practical fluids (A) Are viscous (B) Possess surface tension (C) Are compressible (D) Possess all the above properties
Description : An oil drop spreads over water because (1) oil is lighter than water (2) oil is more viscous (3) oil does not mix with water (4) surface tension of oil is much smaller than that of water
Last Answer : surface tension of oil is much smaller than that of water
Description : The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called (A) Density of liquid (B) Specific gravity of liquid (C) Compressibility of liquid (D) Surface tension of liquid
Description : Viscous force is the __________ of shear stress due to viscosity and cross-section area of flow. (A) Sum (B) Different (C) Product (D) Ratio
Description : 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 force present in a moving liquid is (A) Inertia force (B) Viscous force (C) Gravity force (D) All of these
Description : The two important forces for a floating body are (A) Buoyancy, gravity (B) Buoyancy, pressure (C) Buoyancy, inertial (D) Inertial, gravity
Description : 07. The ratio of the inertia force to the surface tension force is called Weber's number. A) Correct B) Incorrect
Last Answer : A
Description : Power number is the ratio of (A) Drag stress to inertial stress (B) Inertial stress to drag stress (C) Inertial stress to gravitational stress (D) Gravitational stress to drag stress
Last Answer : (A) Drag stress to inertial stress
Description : Froude number is the ratio of (A) Shear stress to gravitational stress (B) Drag stress to shear stress (C) Inertial stress to shear stress (D) Inertial stress to gravitational stress
Last Answer : (D) Inertial stress to gravitational stress
Description : Pick out the wrong statement: (A) The vacuum pressure is always the negative gauge pressure (B) The pressure of the liquid measured by a piezometer tube is the gauge pressure (C) Manometric ... point at which the resultant pressure on an immersed surface acts, is known as the centre of gravity
Last Answer : (D) The point at which the resultant pressure on an immersed surface acts, is known as the centre of gravity
Description : Which of the following properties of a fluid is responsible for offering resistance to shear? (A) Surface tension (B) Viscosity (C) Specific gravity (D) All (A), (B), and (C)
Last Answer : (B) Viscosity
Description : Existence of boundary layer in fluid flow is because of the (A) Surface tension (B) Fluid density (C) Fluid viscosity (D) Gravity forces
Last Answer : (C) Fluid viscosity
Description : The ratio of the inertia force to the viscous force is called (A) Reynold's number (B) Froude's number (C) Weber's number (D) Euler's number
Description : Rittinger number which designates the new surface produced per unit of mechanical energy absorbed by the material being crushed, depends on the (A) State or manner of application of the crushing force (B) Ultimate strength of the material (C) Elastic constant of the material (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Which of the following fluid forces are not considered in the NavierStoke's equation? (A) Gravity forces (B) Viscous forces (C) Pressure forces (D) Turbulent forces
Last Answer : (D) Turbulent forces
Description : In a mixer, the quantity, (v. L/D) is termed as __________ number (where, v = longitudinal velocity of material, L = length of the mixer, D = diffusivity in axial mixing). (A) Weber (B) Peclet (C) Brinkman (D) Schmidt
Last Answer : (B) Peclet
Description : __________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical. (A) Mach (B) Reynolds (C) Froude (D) Weber
Last Answer : (C) Froude