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1. The pressure intensity in kN/m2 (or kPa) at any point in a liquid is (where w = Specific weight of liquid, and h = Depth of liquid from the surface)
2. The mass of 2.5 m3 of a certain liquid is 2 tonnes. Its mass density is
3. Falling drops of water become spheres due to the property of
4. The hydraulic gradient line is always parallel to the centre line of the pipe.
5. The property of a liquid which controls its rate of flow is called viscosity.
6. The D-Alembert's principle is used for changing the dynamic equilibrium of a fluid mass, into a static equilibrium.
7. The dynamic viscosity of the liquid __________ with rise in temperature.
8. A manometer is used to measure
9. The kinematic viscosity of an oil (in stokes) whose specific gravity is 0.95 and viscosity 0.011 poise, is
10. The product of mass and accelaration of flowing liquid is called
11. When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures.
12. Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, in the direction of flow of the liquid, is known as
13. Barometer is used to measure
14. The frictional resistance of a pipe varies approximately with __________ of the liquid.
15. A closed tank is completely filled with an oil. If it is made to move with a horizontal acceleration, then the pressure at the back end will be more than that at the front end.
16. When the Mach number is between __________ the flow is called super-sonic flow.
17. If the coefficient of discharge is 0.6, then the discharge over a right angled notch is
18. If the value of coefficient of discharge increases, the discharge through the orifice decreases.
19. A point, in a compressible flow where the velocity of fluid is zero, is called
20. The height of a water column equivalent to a pressure of 0.15 MPa is
Fluid Mechanics MCQ 7
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