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Mechanical Engineering Objective Questions { Fluid Mechanics }

50. Free surface of a liquid tends to contract to the smallest possible area due to force of
A.Surface tension
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51. Falling drops of water become to the property of
C.Surface tension
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52. A liquid would wet the solid, if adhesion forces as compared to cohesion forces are
D.Less at low temperature and more at high temperature
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53. If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be
A.Higher than the surface of liquid
B.The same as the surface of liquid
C.Lower than the surface of liquid
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54. The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as
A.Meta centre
B.Centre of pressure
C.Centre of buoyancy
D.Centre of gravity
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55. The total pressure on the surface of a vertical sluice gate 2mx 1 m with its top 2 m surface being 0.5 in below the water level will be
A.500 kg
B.1000 kg
C.1500 kg
D.2000 kg
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56. The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to
B.Equilibrium of a floating body
C.Archimedes' principle
D.Bernoulli's theorem
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