3. With reference to forces acting on planar and curved surface, which of the following sentences are correct? A. For planar surfaces, the value of the centre of pressure is the same as the value of the centroid. B. For planar surfaces, the value of the centre of pressure depends upon the liquid acting on the surface. C. For curved surfaces, the expression of the vertical component of the force is equal to the weight of the water column above the curved surface. D. For curved surfaces, the general expression of the horizontal component of the force is the same as the expression for planar surfaces. 4. With reference to the Buoyancy, which of the following sentences are correct? A. The buoyancy force depends upon the total volume of the floating object. B. The buoyancy force depends upon the submerged volume of the floating object. C. In static conditions, for a solid sphere submerged in water, we can write FgB = W, where Fg is the buoyancy force and W is the weight. D. The buoyancy force for a submerged object is always null. 5. With reference to the "Venturi meter", which of the following sentences are correct? A. The Venturi meter is an instrument to measure the flow rate. B. By fixing all the geometrical values, and for the same value of the imposed pressure drop, both horizontal and vertical Venturi meters would return the same measurement of the flow rate. C. When the Venturi meter is arranged with an angle 0 respect to the horizontal plane, the potential energy difference between inlet and outlet is null. D. In the same Venturi meter, two different values of the imposed pressure drop result in two different values of the manometer deflection.
3. With reference to forces acting on planar and curved surface, which of the following sentences are correct? A. For planar surfaces, the value of the centre of pressure is the same as the value of the centroid. B. For planar surfaces, the value of the centre of pressure depends upon the liquid acting on the surface. C. For curved surfaces, the expression of the vertical component of the force is equal to the weight of the water column above the curved surface. D. For curved surfaces, the general expression of the horizontal component of the force is the same as the expression for planar surfaces. 4. With reference to the Buoyancy, which of the following sentences are correct? A. The buoyancy force depends upon the total volume of the floating object. B. The buoyancy force depends upon the submerged volume of the floating object. C. In static conditions, for a solid sphere submerged in water, we can write FgB = W, where Fg is the buoyancy force and W is the weight. D. The buoyancy force for a submerged object is always null. 5. With reference to the "Venturi meter", which of the following sentences are correct? A. The Venturi meter is an instrument to measure the flow rate. B. By fixing all the geometrical values, and for the same value of the imposed pressure drop, both horizontal and vertical Venturi meters would return the same measurement of the flow rate. C. When the Venturi meter is arranged with an angle 0 respect to the horizontal plane, the potential energy difference between inlet and outlet is null. D. In the same Venturi meter, two different values of the imposed pressure drop result in two different values of the manometer deflection.
International Edition---engineering Mechanics: Statics, 4th Edition
4th Edition
ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
Publisher:Andrew Pytel And Jaan Kiusalaas
Chapter9: Moments And Products Of Inertia Of Areas
Section: Chapter Questions
Problem 9.33P: The plane region A is submerged in a fluid of weight density . The resultant force of the fluid...
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