Hydraulics and Fluid Mechanics Questions

• A point, in a compressible flow where the velocity of fluid is zero, is called
• The torque required to overcome viscous resistance of a collar bearing is (where R1 and R2 = External and internal radius of collar)
• Barometer is used to measure
• The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head.
• The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is
• A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to bring the liquid level from H1 to H2 will be
• 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
• The dynamic viscosity of the liquid __________ with rise in temperature.
• The flow at critical depth in an open channel is called torrential flow.
• The height of a water column equivalent to a pressure of 0.15 MPa is
• The sheet of water flowing over a notch or a weir is known as
• The most efficient section of a channel is
• When a body, floating in a liquid, is given a small angular displacement, it starts oscillating about a point known as
• A flow in which the quantity of liquid flowing per second is not constant, is called
• The force per unit length is the unit of
• In the manufacturing of lead shots, the property of surface tension is utilised.
• In a convergent mouthpiece, the absolute pressure head at vena contracta is the same as that of the atmosphere.
• In a broad-crested weir, the discharge is maximum if the head of water on the downstream side of weir is __________ the head of water on the upstream side of weir.
• When a cylindrical vessel containing liquid is revolved about its vertical axis at a constant angular velocity, the pressure
• The force present in a moving liquid is