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Civil Engineering Objective Questions { Hydraulics }

36. The depth of the centre of pressure on a vertical rectangular gate (4 m wide, 3 m high) with water upto top surface, is
A. 1.0 m
B. 1.5 m
C. 2.0 m
D. 2.5 m.
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37.  If the atmosphericyressure on the surface of an oil tank (sp. gr. 0.8) is 0.1 kg/cm, the pressure at a depth of 2.5 m, is
A. 1 metre of water
B. 2 metres of water
C. 3 metres of water
D. 3.5 metres of water
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38. On an inclined plane, centre of pressure is located
A. at the centroid
B. above the Centroid
C. below the centroid
D. anywhere.
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39.  When a body is totally or partially immersed in a fluid, it is buoyed up by a force equal to
A. weight of the body
B. weight of the fluid displaced by the body
C. weight of the body and fluild displaced by the body
D. difference of weights of the fluid displaced and that of the body
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40. A floating body attains stable equilibrium if its metacentre is
A. at the centroid
B. above the centroid
C. below the centroid
D. anywhere.
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41. Centre of buoyancy is
A. centroid of the floating body
B. centroid of the fluid displaced
C. centre of pressure of the displaced liquid
D. none of these.
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42. A water tank partially filled with water is being carried on a truck moving with a constant horizontal acceleration. The level of the water
A. rises on the front side of the tank
B. falls on the back side of the tank
C. remains the same at both sides of the tank
D. rises on the back side and falls on the front side
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