Fluid Machines - Interview Questions and Answers

76. For laminar flow in circular pipes, the Darcy's friction factor f is equal to

77. Drag force is a function of i) projected area of the body ii) mass density of the fluid iii) velocity of the body The correct answer is

78. A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, then i) the ball will move to the front ii) the bubble will move to the front iii) the ball will move to the rear iv) the bubble will move to the rear Find out which of the above statements are correct ?

79. Surge wave in a rectangular channel is an example of i) steady flow ii) unsteady flow iii) uniform flow iv) non-uniform flow The correct answer is

80. Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is