Pick out the wrong statement?
Pick out the correct statement?
Pick out the wrong statement about cavitation?
A globe valve is the most suitable for applications, in which__________?
Buckingham-π theorem states that in any physical problem including ‘n’ quantities having ‘m’ dimensions, the quantities can be arranged into __________ independent dimensionless parameters?
When the head pumped against is less than the head of the fluid used for pumping, the usual device is a/an__________?
The hydraulic radius for flow in a rectangular duct of cross-sectional dimension H, W is__________?
Permanent pressure loss in a well designed Venturimeter is about __________ percent of the venturi differential?
For an ideal fluid flow, Reynolds number is__________?
Unit of mass velocity is__________?
The lift of a balloon is__________?
The most economical flow control valve for use with large diameter pipes is a__________?
The equivalent diameter for fluid flow through square cross section channel of side ‘x’, for pressure drop calculation purpose is given by__________?
Minimum fluidisation velocity for a specific system depends upon the__________?
In case of a pipe of constant cross-sectional area, the maximum fluid velocity obtainable is__________?
Pressure drop for laminar fluid flow through a circular pipe is given by__________?
The hydraulic diameter of an annulus of inner and outer radii Ri and Ro respectively is__________?
A pipe has a porous section of length L as shown in the figure. Velocity at the start of this section of V0. If fluid leaks into the pipe through the porous section at a volumetric rate per unit area q(x/L)2, what will be axial velocity in the pipe at any „x‟? Assume incompressible one dimensional flow i.e., no gradients in the radial direction ?
Navier-Stokes equation is useful in the analysis of __________ fluid flow problems?
The head loss in turbulent flow in a pipe varies__________?
Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water column in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm)?
Which of the following produces maximum pressure difference for transportation of gases ?
Bernoulli’s equation is dependent on the__________?
For the production of very high vacuum, a __________ pump is normally used?
Foot valve provided in the pump is a __________ valve?
For water, when the pressure increases, the viscosity__________?
Air vessel provided in a reciprocating pump is for__________?
Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the __________ head?
Multistage centrifugal pumps are generally used for__________?
Specific speed of a centrifugal pump depends upon the __________ head?
The simple Pitot tube does not measure the__________?
Bernoulli’s equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli’s equation? A. Fluid flow is frictionless & irrotational. B. Fluid flow is steady. C. Fluid flow is uniform & turbulent. D. Fluid is compressible. E. Fluid is incompressible ?
Transition from laminar flow to turbulent flow is aided by the__________?
At low Reynolds number__________?
Which of the following valves will incur maximum pressure drop for the same discharge of water ?
Venturimeter and orificemeter measures the __________ of the fluid?
A fluid which has a linear relationship between the magnitude of applied shear-stress and the resulting rate of deformation is called a/an __________ fluid?
In the low Reynolds number region, the drag force on a sphere is proportional to__________?
Capillary tube method of viscosity measurement is based on the __________?
Nominal Pipe Size (NPS) of a pipe less than 12 inches in diameter indicates its__________?
The friction factor for turbulent flow in a hydraulically smooth pipe__________?
The continuity equation__________?
Rubber latex is an example of a __________ fluid?
Specific speed for a centrifugal pump is__________?
For the laminar flow of a fluid in a circular pipe of radius R, the Hagen-Poisseule equation predicts the volumetric flow rate to be proportional to__________?
The fluid jet discharging from a 2″ diameter orifice has a diameter of 1.75″ at its venacontracta. The co-efficient of contraction is__________?
In frictional fluid flow, the quantity, (P/ρ) + (V2/2gc) + gz/gc) is__________?
A Newtonian liquid (ρ = density, μ = viscosity) is flowing with velocity „v‟ in a tube of diameter ‘D’. Let Δp be the pressure drop across the length ‘L’. For a laminar flow, Δp is proportional to__________?
An equipotential line is __________ to the velocity vector at every point?
The nominal size of a hose pipe is specified by its __________?
The equivalent diameter for pressure drop calculation for a fluid flowing through a rectangular cross-section channels having sides ‘x’ & ‘y’ is given by__________?

Pick out the wrong statement?

A. The shear stress at the pipe (dia = D, length = L) wall in case of laminar flow of Newtonian fluids is (D/4L). Δp
B. In the equation, T. gc = k. (du/dy)n the value of ‘n’ for pseudoplastic and Dilatant fluid are 1 respectively
C. Shear stress for Newtonian fluid is proportional to the rate of shear in the direction perpendicular to motion
D. With increase in the Mach number >0.6, the drag co-efficient decreases in case of compressible fluids

Correct Answer: With increase in the Mach number >0.6, the drag co-efficient decreases in case of compressible fluids ✔

Last Updated: March 11, 2019