Hydraulics and Fluid Mechanics Questions

• When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as
• The hydraulic mean depth or the hydraulic radius is the ratio of
• The Cippoletti weir is a __________ weir.
• One poise is equal to
• Gauge pressure at a point is equal to the absolute pressure __________ the atmospheric pressure.
• When a body is placed over a liquid, it will sink down if
• A flow whose streamline is represented by a straight line, is called __________ dimensional flow.
• The metacentric height is the distance between the
• The critical depth for a channel is given by (where q = Unit discharge (discharge per unit width) through the channel)
• When the end contractions of the weir are suppressed, then number of end contractions (n) are taken as zero
• The hammer blow in pipes occurs when
• 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.
• The discharge through a channel of trapezoidal section is maximum when
• The variation in the volume of a liquid with the variation of pressure is called its
• A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is
• The absolute pressure is equal to
• 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
• The unit of kinematic viscosity in S. I. units is
• The intensity of pressure at any point, in a liquid, is
• The line of action of the force of buoyancy acts through the centre of gravity of the volume of the liquid displaced.