Q. 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

View solution

Q. The height of a water column equivalent to a pressure of 0.15 MPa is

View solution

Q. The total energy of a liquid particle in motion is equal to

View solution

Q. A notch is used to measure __________ of liquids.

View solution

Q. A flow is called sonic, if the Mach number is unity.

View solution

Q. An error of 1% in measuring head over the crest of the notch (H) will produce an error of __________ in discharge over a triangular notch,

View solution

Q. A flow through a long pipe at decreasing rate is called __________ uniform flow.

View solution

Q. The surface tension of mercury at normal temperature is __________ that of water.

View solution

Q. The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and ρ = Density of the fluid)

View solution

Q. The pressure intensity in kN/m² (or kPa) at any point in a liquid is (where w = Specific weight of liquid, and h = Depth of liquid from the surface)

View solution

Q. The hydraulic gradient line is always parallel to the centre line of the pipe.

View solution

Q. Barometer is used to measure

View solution

Q. A closed tank is completely filled with an oil. If it is made to move with a horizontal acceleration, then the pressure at the back end will be more than that at the front end.

View solution

Q. When a cylindrical vessel containing liquid is revolved about its vertical axis at a constant angular velocity, the pressure

View solution

Q. The specific weight of compressible fluids does not remain constant.

View solution

Q. The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called

View solution

Q. In a convergent mouthpiece, the absolute pressure head at vena contracta is the same as that of the atmosphere.

View solution

Q. Newton's law of viscosity is a relationship between

View solution

Q. The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v = Velocity of the liquid in the pipe, μ = Viscosity of the liquid, and w = Specific weight of the flowing liquid)

View solution

Q. The viscosity of water at 20°C is

View solution