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FLUID MECHANICS Multiple Choice Questions and Answers pdf free download for civil engineering link-marketing.info provide mcqs objective type. choice Questions and Answers pdf. FLUID MECHANICS Multiple choice Questions and Answers pdf: 1. Fluid is a substance that (a) cannot be subjected to. INSTRUCTION: Answer ALL questions. Question are multiple choice questions: choose the best possible answer/answers for each of the following.
The specific gravity of wood is a 0. Cavitation will begin when a the pressure at any location reaches an absolute pressure equal to the saturated vapour pressure of the liquid b pressure becomes more than critical pressure c flow is increased d pressure is increased e none of the above. The rise or depression of liquid in a tube due to surface tensionwim increase in size of tube will a increase b remain unaffected c may increase or decrease depending on the characteristics of liquid d decrease e unpredictable. Mercury does not wet glass. The horizontal component of buoyant force is a negligible b same as buoyant force c zero Ans:
Froude's number C. Mach number D. Euler's number Answer: Option C Explanation: In a depressed nappe A.
Option B Explanation: In one dimensional flow, the flow A. The kinematic viscosity is the A. Option A Explanation: Choose the wrong statement a The horizontal component of the hydro-static force on any surface is equal to the normal force on the vertical projection of the surface b The horizontal component acts through the center of pressure for the vertical projection c The vertical component of the hydrostatic force on any surface is equal to the weight of the volume of the liquid above the area d he vertical component passes through the center of pressure of the volume e Center of pressure acts at a greater depth than center of gravity.
Buoyant force is a resultant force acting on a floating body b equal to the volume of liquid displaced. Choose the wrong statement a any weight. For a body floating in a liquid the normal pressure exerted by the liquid acts at a bottom surface of the body b e. According to the principle of buoyancy a body totally or partially immersed in a fluid will be lifted up by a force equal to a the weight of the body b more than the weight of the body c less than the weight of the body d weight of the fluid displaced by the body e weight of body plus the weight of the fluid displaced hy the body.
When a body floating in a liquid. How long should it take to empty the prototype? A model of a reservior is drained in 4 mts by opening the sluice gate. For dynamic similarity. The model scale is 1: What model scale has been used? The two important forces for a floating body are a buoyancy.
For a floating body to be in stable equilibrium. Center of pressure on an inclined plane is a at the centroid b above the centroid c below the centroid d at metacentre e at center of pressure.
For a floating body to be in equilibrium a meta centre should be above e. The free water surface will a be horizontal b make an angle in direction of inclination of inclined plane c make an angle in opposite direction to inclination of inclined plane. An open vessel of water is accelerated up an inclined plane.
Choose the wrong statement a The center of buoyancy is located at the center of gravity of the displaced liquid b For stability of a submerged body. Differential monometer is used to measure a pressure in pipes. Resultant pressure of the liquid in the case of an immersed body acts through a centre of gravity b centre of pressure c metacentre d centre of buoyancy e in between e.
The centre of gravity of the volume of the liquid displaced by an immersed body is called a centre of gravity b centre of pressure c metacentre d centre of buoyancy e centroid. The pressure at 2. The line of action of the buoyant force acts through the centroid of the a submerged body b volume of the floating body c volume of the fluid vertically above the body d displaced volume of the fluid e none of the above. The pressure in the air space above an oil sp. 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 e in case of an ideal fluid.
Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surface will be a kg b kg c kg d kg e kg. For measuring flow by a venturimeter. In an immersed body. In the case of steady flow of a fluid. True one-dimensional flow occurs when a the direction and magnitude of the veiocity at all points are identical b the velocity of successive fluid par-ticles. Rotameter is a device used to measure a absolute pressure b velocity of fluid c flow d rotation e velocity of air.
Hot wire anemometer is used to measure a pressure in gases b liquid discharge c pressure in liquids d gas velocities e temperature. Non uniform flow occurs when a the direction and magnitude of the velocity at all points are identical b the velocity of successive fluid particles.
Gradually varied flow is a steady uniform b non-steady non-uniform c non-steady uniform d steady non-uniform e true one-dimensional.
Uniform flow occurs when a the flow is steady b the flow is streamline c size and shape of the cross section in a particular length remain constant d size and cross section change uniformly along length e flow occurs at constant fate. Steady flow occurs when a the direction and magnitude of the velocity at all points are identical b the velocity of successive fluid particles.
During the opening of a valve in a pipe line. The flow which neglects changes in a transverse direction is known as a one dimensional flow b uniform flow c steady flow d turbulent flow e streamline flow. Flow occurring in a pipeline when a valve is being opened is a steady b unsteady c laminar. The flow in which the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant.
The flow in which conditions do not change with time at any point.
The flow in which each liquid particle has a definite path and their paths do not cross each other is called a one dimensional flow b uniform flow c steady flow d turbulent flow e streamline flow.
The flow in which the velocity vector is identical in magnitude and direction at every point. The specific gravity of wood is a 0. What fraction of its volume is under mercury? A streamline is defined as the line a parallel to central axis flow b parallel to outer surface of pipe c of equal yelocity in a flow d along which the pressure drop is uniform e which occurs in all flows.
Two dimensional flow occurs when a the direction and magnitude of the velocity at all points are identical b the velocity of successive fluid particles.
A piece of metal of specific gravity 7 floats in mercury of specific gravity General energy equation holds for a steady flow b turbulent flow c laminar flow d non-uniform flow e all of the above. In a free vortex motion. For hypersonic flow. The upper surface of a weir over which water flows is known is a crest b nappe c sill d weir top. The region between the separation streamline and the boundary surface of the solid body is known as a wake b drag c lift d boundary layer e aerofoil section.
In a forced vortex. Normal depth in open channel flow is the depth of flow corresponding to a steady flow b unsteady flow c laminar flow d uniform flow e critical flow. Uniform flow occurs when a the direction and magnitude of the velocity at all points are identical b the velocity of successive fluid paiticles.
Pitot tube is used for measurement of a pressure b flow c velocity d dsscharge e viscosity. Froude number is significant in a supersonics.
Reynolds number is significant in a supersonics. Mach number is significant in a supersonics. The equation of continuity holds good when the flow a is steady b is one dimensional c velocity is uniform at all the cross sections d all of the above e none of the above.
In order that flow takes place between two points in a pipeline. At the center line of a pipe flowing under pressure where the velocity gradient is zero. The pressure in Pascals at a depth of 1 m below the free surface of a body of water will be equal to a 1 Pa. A large Roynold number is indication of a smooth and streamline flow b laminar flow c steady flow d turbulent flow e highly turbulent flow. For pipes.
The fluid forces considered in the Navier Stokes equation are a gravity. Cavitation is caused by a high velocity b high pressure c weak material d low pressure e low viscosity. The force required on plunger is equal to a 10 kg b kg c kg d 1 kg e It is required to lift a weight of 1 tonne.
A hydraulic press has a ram of 15 cm diameter and plunger of 1. Bernoulli equation deals with the law of conservation of a mass b momentum c energy d work e force.
Two pipe systems can be said to be equivalent. For similarity. Cavitation will begin when a the pressure at any location reaches an absolute pressure equal to the saturated vapour pressure of the liquid b pressure becomes more than critical pressure c flow is increased d pressure is increased e none of the above.
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