Hydraulics

51) The gases are considered incompressible when mach number

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is less than 0.2

52) Gauge pressure at a point is equal to

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absolute pressure minus atmospheric pressure

53) For submerged curved surface, the vertical component of the hydrostatic force is

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weight of the liquid supported by the curved surface

54) For a floating body, the buoyant force passes through the

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metacentre of the body

55) Flow of a fluid in a pipe takes place from

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higher energy to lower energy

56) The necessary condition for the flow to be steady is that

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the velocity is constant at a point with respect to time

57) The term p/ ϼg is known as

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pressure energy per unit weight

58) The term V2/2g is known as

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kinetic energy per unit weight

59) The term Z is known as

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potential energy per unit weight

60) The maximum velocity through a circular channel takes place when depth of flow to

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0.81 times the diameter

Subject Notes

Objective Box

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