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1. The liquid used in manometers should have
2. When the end contractions of the weir are suppressed, then number of end contractions (n) are taken as zero
3. A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy.
4. A flow is called hyper-sonic, if the Mach number is
5. The velocity at which the flow changes from laminar flow to turbulent flow is called
6. When a plate is immersed in a liquid parallel to the flow, it will be subjected to a pressure __________ that if the same plate is immersed perpendicular to the flow.
7. The viscosity of a liquid __________ its rate of flow through a hole in a vessel.
8. Reynold's number is the ratio of the inertia force to the
9. The variation in the volume of a liquid with the variation of pressure is called its
10. The formula for discharge over a sharp-crested weir and Ogee weir is same as that of a rectangular weir
11. The discharge through a channel of trapezoidal section is maximum when
12. The Cippoletti weir is a __________ weir.
13. A uniform body 3 m long, 2 m wide and 1 m deep floats in water. If the depth of immersion is 0.6 m, then the weight of the body is
14. The pressure of a liquid measured with the help of a piezometer tube is
15. The hydraulic mean depth for a circular pipe of diameter (d) is
16. The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the
17. A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.
18. Gauge pressure at a point is equal to the absolute pressure __________ the atmospheric pressure.
19. The flow in a pipe or channel is said to be non-uniform when
20. The pressure measured with the help of a pressure gauge is called
Fluid Mechanics MCQ 9
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