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You Are On Multi Choice Question Bank SET 1441

72051. The power transmitted through the pipe is maximum when the head lost due to friction is equal to





72052. The specific weight of sea water is __________ that of pure water.




72053. If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, The body is said to be in __________ equilibrium.




72054. The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to





72055. A flow is called sub-sonic, if the Mach number is





72056. The discharge of a depressed nappe is 6 to 7 percent __________ that of a free nappe.



72057. Re-entrant or Borda's mouthpiece is an __________ mouthpiece.



72058. The flow in a pipe is neither laminar nor turbulent when Reynold number is





72059. The intensity of pressure on an immersed surface __________ with the increase in depth.




72060. According to Pascal's law, the intensity of pressure at any point in a fluid at rest is the same in all directions.



72061. The ratio of the inertia force to the surface tension force is called Weber's number.



72062. For a perfect incompressible liquid, flowing in a continuous stream, the total energy of a particle remains the same, while the particle moves from one point to another. This statement is called


72063. The buoyancy depends upon the





72064. In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.



72065. When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is





72066. The total energy line lies over the centre line of the pipe by an amount equal to





72067. A piezometer tube is used only for measuring





72068. The flow in a pipe is turbulent when Reynold number is





72069. When a tank containing liquid moves with an acceleration in the horizontal direction, then the free surface of the liquid





72070. The discharge through a small rectangular orifice is given by (where Cd = Coefficient of discharge for the orifice, a = Cross-sectional area of the orifice, h = Height of the liquid above the centre of the orifice)


72071. The siphon will work satisfactorily, if the minimum pressure in the pipe is __________ vapour pressure of liquid.




72072. The difference between the notch and weir is that the notch is of bigger size and the weir is of a smaller size.



72073. An open tank containing liquid is moving with an acceleration on an inclined plane. The inclination of the free surface of the liquid will be __________ to the acceleration of the tank.




72074. Euler's number is the ratio of __________ force to pressure force.




72075. The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to





72076. The ratio of velocity of fluid in an undisturbed stream to the velocity of sound wave is known as Mach number.



72077. All the gases are considered to have compressible flow and all the liquids are considered to have incompressible flow.



72078. When a cylindrical vessel containing liquid is revolved, the surface of the liquid takes the shape of





72079. The hydraulic mean depth or the hydraulic radius is the ratio of





72080. The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as





72081. Stoke is the unit of





72082. One poise is equal to





72083. The absolute pressure is equal to





72084. When the pressure intensity at a point is more than the local atmospheric pressure, then the difference of these two pressures is called





72085. The hammer blow in pipes occurs when





72086. When a body is placed over a liquid, it will sink down if





72087. A flow whose streamline is represented by a curve, is called





72088. When the Mach number is less than unity, the flow is called





72089. When the end contractions of the weir are suppressed, then number of end contractions (n) are taken as zero



72090. A flow is called hyper-sonic, if the Mach number is





72091. The intensity of pressure at any point, in a liquid, is





72092. If the depth of water in an open channel is greater than the critical depth, the flow is called





72093. A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy.




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