Fluid Mechanics (41-60)
- sudhanshucivil2010
- Apr 6, 2020
- 2 min read
Updated: Apr 9, 2020
41. If velocity is zero over l/3rd of a cross section and is uniform over remaining
2/3rd of the cross-section, then the correction factor for kinetic energy is
9/4
42.The continuity equation p1 V1 A1= p2V2A2 is based on the following assumption
regarding flow of fluid steady flow
43.
In the most general form of Bernoulli's equation each term represents energy per unit weight
44. Which of the following velocity potentials satisfies continuity equation ?
x² - y²
45. The magnitude of the component of velocity at point (1, 1) for a stream function ψ = x² - y² is equal to 2√2
46. The motion of air mass in a tornado is a forced vortex at centre and free vortex
outside
47. In a forced vortex motion, the velocity of flow is directly proportional to its radial distance from axis of rotation
48.Stream lines and path lines always coincide in case of steady flow
49. The kinetic energy correction factor is
50. The momentum correction factor for the velocity distribution shown in Fig. 1.1 is
4/3
51. Equation of continuity is based on the principle of conservation of mass
52. In steady flow of a fluid, the total acceleration of any fluid particle can be zero
53. The pitot tube is used to measure stagnation pressure
54. Hot wire anemometer is used to measure velocity of gas
55. The theoretical value of coefficient of contraction of a sharp edged orifice is
0.611
56. Which of the following is used to measure the discharge ? venturimeter
57. The pitot static tube measures dynamic pressure
58. A fluid jet discharging from a 4 cm diameter orifice has a diameter 3 cm at its
vena contracta. If the coefficient of velocity is 0.98, the coefficient of discharge for the orifice will be 0.98 x (0.75)²
59.The energy loss in orifice flow is given by H(1-w²)
60.The pressure intensity at vena contracta is atmospheric,Stream lines are parallel throughout the jet at vena contracta,Coefficient of contraction is always less than one
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