Which of the following is not concerned with the fluid-particle interaction ?

The resistance wire used in a hot wire anemometer for conducting electrical current is made of

For the free settling of a spherical particle through a fluid, the slope of, C_D-log N_Re , plot is

Most commonly used joint in the underground pipe lines is the

Molten soap mass is transported by a __________ pump.

The ratio of the depth of flow to the hydraulic radius for the most economical trapezoidal section, in open channel flow is

Dimension of absolute viscosity is

The fluid property which matters for fall-ing rain drops to acquire spherical shape is its

Which of the following fluid forces are not considered in the Navier-Stoke's equation?

What causes convective acceleration in fluid flow ?

The terminal velocity of a small sphere settling in a viscous fluid varies as the

Working principle of manometer comprises of balancing a coloumn of liquid against the pressure to be measured. Inclined tube manometer is especially used for the measurement of __________ pressure.

At high Reynolds number

Pick out the correct statement.

Maximum theoretical suction lift for water at 15°C by a centrifugal pump isft. The same for water at 90°C will be __________ ft.

With diminishing cross-sectional area in case of subsonic flow in a converging nozzle, the

A centrifugal pump loses prime after starting. The reason of this trouble may be

Schedule number of a pipe, which is a measure of its wall thickness, is given by

__________ pumps are axial flow pumps.

The simple pitot tube does not measure the

Which of the following may be termed as a variable orifice flowmeter ?

The Stoke's stream function applies to the

If the discharge of a centrifugal pump is throttled, then its suction lift

Isotropic turbulence occurs

Power loss in an orificemeter is __________ that in a venturimeter.

The drag co-efficient for a bacterium moving in water at 1 mm/s, will be of the following order of magnitude (assume size of the bacterium to be 1 micron and kinematic viscosity of water to be 10^-6m²/s).

The fluid property, due to which, mercury does not wet the glass is

Velocity distribution for flow between two fixed parallel plates

Shear stress in a fluid flowing in a round pipe

Boundary layer separation is characterised by one of the conditions given below, where 'Re' is the Reynolds number for the flow. Select the appropriate conditions.

Venturimeter and orificemeter measures the __________ of the fluid.

The net positive suction head (NPSH) of a centrifugal pump is defined as the sum of the velocity head and the pressure head at the

The ratio of wall drag to total drag in the Stoke's law range is

In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where, T = absolute temperature )

A fluid element has a velocity V = -y² . xi + 2yx² . j. The motion at (x, y) = (l/2,is

Brownian movement is prominent in the particle size range of __________ microns in case of settling of a particle in a fluid.

Boundary layer separation occurs when the

Remote control valve is a __________ valve.

In turbulent flow, a rough pipe has the same friction factor as a smooth pipe

Slugging in a fluidised bed can be avoided by using

Foot valves provided in pumps are __________ valves.

The co-efficient of drag and lift for an incompressible fluid depends on the

The terminal velocity of a particle moving through a fluid varies as d_pⁿ. What is the value of n' for Newton's law regime ?

For Laminar flow through a packed bed, the pressure drop is proportional to (V_s is the superficial liquid velocity and D_p is the particle diameter)

Laminar flow of a Newtonion fluid ceases to exist, when the Reynolds number exceeds

Priming is needed in a __________ pump.

Manometers measure the __________ pressure.

Surge tanks are provided in high pressure water pipelines to

Rotary vacuum pumps can reduce the absolute pressure to as low as __________ mm Hg.

Applying a pressure drop across a capillary results in a volumetric flow rate 'Q' under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is