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Mechanical Engineering Objective Questions { Hydraulic Fluid Mechanics }



218. Equation of continuity of flow is based on the principle of conservation of (where Re = Reynolds number).
A.Mass
B.(c) momentum
C.(a) Re
D.(c) Re1/2
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219. Bernoulli's theorem deals with the conservation of
A.Mass
B.(c) momentum
C.(b) force
D.Energy
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220. An air vessel is usnally provided at the summit of a syphon in order to
A.Regulate the flow
B.Increase discharge
C.Avoid interruption in flow
D.Increase velocity
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221. The flow at critical depth in an open channel is
A.Maximum
B.Minimum
C.Zero
D.Half of normal flow
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222. Tube is an opening
A.With closed perimeter and of regular form through which water flows
B.With prolonged sides having length of 2-3 diameters of opening in thick wall
C.With partially full flow
D.In hydraulic structure with regulation pi ?vision
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223. Highest efficiency is obtained with following channel section
A.Circular
B.Trapezoidal.
C.Rectangular
D.Quadrant
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224. A triangular section in open cnannel flow will be most eeonornical when the vertex angle at the triangle base point is
A.30?
B.45?
C.60?
D.90?
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