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
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 : 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 : 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
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 : Reynold's number is the ratio of inertia force to (A) Pressure force (B) Elastic force (C) Gravity force (D) Viscous 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.
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 : 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 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 : 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 : Ratio of inertia force to elastic force is known as (A) Mach number (B) Froude number (C) Reynolds number (D) Weber's number
Description : The ratio of the inertia force to the elastic force is called (A) Reynold's number (B) Froude's number (C) Weber's number (D) Mach number
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 : 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 : Weber number is the ratio of inertial force to __________ force. (A) Surface tension (B) Gravity (C) Viscous (D) Elastic
Last Answer : (A) Surface tension
Description : Euler's number is the ratio of __________ force to pressure force. (A) Inertia (B) Gravity (C) Viscous (D) None of these
Description : __________ forces do not act in case of fluid flow. (A) Elastic (B) Tensile (C) Vibratory (D) Centrifuga
Last Answer : (B) Tensile
Description : 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
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
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
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 : 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 : __________ 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
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 : Ratio of pressure and inertia force gives __________ number. (A) Weber (B) Mach (C) Euler (D) Froude
Last Answer : (C) Euler
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 : 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 : 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 : 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 : 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 : Which of the following denotes the effect of compressibility in fluid flow? (A) Weber number (B) Mach number (C) Euler number (D) Reynolds number
Last Answer : (B) Mach numbe
Description : The Mach number for hypersonic flow of compressible fluid is (A) 1 (B) > 1 (C) > 4 (D) < 2
Last Answer : (C) > 4
Description : In case of supersonic flow of a fluid through pipeline, the 'Mach number' is (A) 0 (B) 1 (C) < 1 (D) > 1
Last Answer : (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
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 : 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 pressure forces to inertial forces is called the __________ number. (A) Froude (B) Euler (C) Reynold (D) Mach
Last Answer : (B) Euler
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 : 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 : _________ fluid force is not considered in the Navier-Stokes equation. (A) Turbulent (B) Viscous (C) Gravity (D) Pressure
Last Answer : (A) Turbulent
Description : Mach number is significant in (A) Supersonics, as with projectiles and jet propulsion (B) Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc. (C) Simultaneous motion through ... gravity force, and wave making effects, as with ship's hulls (D) All of the above
Description : __________ forces act on a particle moving through a stationary fluid (A) Gravity (B) Drag (C) Buoyant (D) All (A), (B), & (C)
Last Answer : (D) All (A), (B), & (C)
Description : Ratio of inertia force to surface Jension is known as (A) Mach number (B) Froude number (C) (D) Weber's number
Description : A moving body on Earth ordinarily comes to rest by itself because of the (a) Law of inertia (b) Forces of friction (c) Conservation of momentum (d) Gravity
Last Answer : Ans:(b)
Description : If you throw a ball across a field, which forces are most likely to cause it to stop? a) Inertia and Magnetism b) Friction and Gravity c) Wind resistance and magnetism d) Gravity and Inertia
Last Answer : b) Friction and Gravity
Description : A measure of the extent to which viscous heating is important relative to the heat flow resulting from the impressed temperature difference is represented by the __________ number. (A) Condensation (B) Grashoff (C) Stanton (D) Brinkman
Last Answer : (D) Brinkman
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