Fluid Statics & Pressure Measurement Dive into fluid at rest — explore Pascal’s law, manometers, buoyancy, and pressure forces on submerged surfaces. 1 / 20 A piezometer is used for measuring Pressure head of fluid Velocity of fluid Flow rate Temperature A piezometer is a simple vertical tube that indicates the pressure head at a point in fluid. 2 / 20 The buoyant force on a submerged body equals Weight of fluid displaced Weight of body Pressure difference Mass of fluid displaced Archimedes’ principle defines buoyant force equal to the displaced fluid’s weight. 3 / 20 The pressure in a liquid increases with Temperature Surface tension Depth Viscosity Deeper points in a fluid bear more pressure due to the weight of the liquid above. 4 / 20 A fluid at rest cannot sustain Compressive stress Tensile stress Shear stress Normal stress A static fluid only resists normal stresses; any shear causes motion. 5 / 20 A differential manometer measures Absolute pressure Atmospheric pressure Gauge pressure Difference of pressure between two points It shows pressure difference by comparing the heights of liquid columns in both limbs. 6 / 20 In a floating body, if the metacentric height is positive, the equilibrium is Stable Unstable Neutral None Positive metacentric height ensures the body returns to equilibrium after small tilts. 7 / 20 The centre of pressure for an inclined plane surface lies Below the centroid Above the centroid At the centroid At free surface Pressure increases with depth, so the resultant acts below the centroid. 8 / 20 The pressure intensity at the bottom of a tank filled with liquid depends on Viscosity of liquid Shape of tank Area of tank Depth and density of liquid Pressure at depth h = ρgh, independent of shape or area of tank. 9 / 20 The principle of buoyancy was given by Newton Archimedes Bernoulli Pascal Archimedes’ principle states that a body immersed in fluid experiences an upward force equal to the weight of displaced fluid. 10 / 20 The buoyant force on a body immersed in fluid acts through Centre of buoyancy Centre of gravity Centroid Centre of pressure The centre of buoyancy is the centroid of the displaced volume of fluid. 11 / 20 The pressure difference measured by a U-tube manometer depends on Density difference of the fluids Area of the tube Viscosity Temperature The pressure difference equals the product of height difference and density difference. 12 / 20 The total pressure on a plane surface submerged in a liquid acts Horizontally At an angle Parallel to the surface Perpendicular to the surface Hydrostatic pressure always acts normal to the surface. 13 / 20 The point where the total pressure acts on a submerged surface is called Neutral point Centre of pressure Centroid Centre of buoyancy Centre of pressure is the point of action of the resultant hydrostatic force on a surface. 14 / 20 A barometer measures Gauge pressure Vacuum pressure Absolute pressure of gas Atmospheric pressure A barometer measures atmospheric pressure using a column of mercury. 15 / 20 The pressure head is expressed as Density / Pressure Pressure × Density g / Pressure Pressure / (Density × g) Pressure head converts pressure into an equivalent column height of fluid. 16 / 20 A device used for measuring small pressure differences between two points is called Barometer Pressure gauge Venturi meter Manometer Manometers use a column of liquid to measure small pressure differences with high accuracy. 17 / 20 The absolute pressure is equal to Gauge pressure + Atmospheric pressure Atmospheric pressure − Gauge pressure Vacuum pressure + Gauge pressure None of the above Absolute pressure measures total pressure relative to perfect vacuum. 18 / 20 The unit of pressure in SI system is Bar atm Newton Pascal Pressure = Force/Area, and its SI unit is Pascal (Pa), equivalent to N/m². 19 / 20 The pressure at any point in a liquid at rest acts Equally in all directions Only vertically Only horizontally At an angle In a fluid at rest, the pressure acts equally in all directions, as stated by Pascal’s Law. 20 / 20 The pressure at a point in a static fluid increases with Depth of fluid Density of fluid Viscosity of fluid Temperature of fluid Pressure in a static fluid increases linearly with depth due to the weight of the fluid above the point. Your score isThe average score is 0% 0% Restart quiz
