SSC JE Mechanical Engineering 27th Jan 2018 Shift-1

shape of body

dimensions of body

flow direction

shape of body and separation of flow

with closed perimeter and of regular form through which water flows

with prolonged sides having length of 2 - 3 diameters of opening in thick wall

with partially full flow

in hydraulic structure with regulation provision

cavitation occurs at vena contracta

vortex is created at vena contracta

variation in discharge is high

flow-through mouth piece is erratic

product of pressure at its centroid and area

weight of liquid retained by the curved area

force on a vertical projection of the curved surface

weight of liquid vertically above the curved surface

critical

turbulent

torrential

tranquil

$$\frac{2}{3} C_{d} \sqrt{2g} \tan \theta h^{\frac{3}{2}}$$

$$\frac{8}{15} C_{d} \sqrt{2g} \tan \theta h^{\frac{3}{2}}$$

$$\frac{2}{3} C_{d} \sqrt{2g} \tan \theta h^{\frac{5}{2}}$$

$$\frac{8}{15} C_{d} \sqrt{2g} \tan \theta h^{\frac{5}{2}}$$

relieve the pipe line of excessive pressure produced by water hammer

smoothen flow

act as reservoir for emergency conditions

avoid reverse flow

inertia force

gravity force

viscous force

surface tension

$$C_{d}=C_{v}+C_{c}$$

$$C_{d}=C_{v}-C_{c}$$

$$C_{d}=C_{c}+C_{v}$$

$$C_{d}=C_{c} \times C_{v}$$

with closed perimeter and of regular form through which water flows

with prolonged sides having length of 2 to 3 diameters of opening in thick wall

with partially full flow

in hydraulic structure with regulation provision