Q.1
Experimental study of laminar fluid flow through a circular tube was conducted by
Q.2
Centrifugal pump is normally classified on the basis of the
Q.3
The ratio of the wall drag to the form drag in the Stoke's law range (for motion of spherical particles in a stationary fluid) is
Q.4
For the free settling of a spherical particle through a fluid, the slope of, CD-log NRe , plot is
Q.5
Various efficiencies of a centrifugal pump are related as (where, ηm = mechanical efficiency ηv = volumetric efficiency. ηma = manometric efficiency ηo = overall efficiency)
Q.6
Check valves are used
Q.7
For a given Reynolds number, in a hydraulically smooth pipe, further smoothening __________ the friction factor.
Q.8
Boundary layer exists in flow
Q.9
Buoyant force
Q.10
The line of action of the buoyant force acts through the
Q.11
Which of the following can be used to create a flow of gas, where no significant compression is required?
Q.12
Choking in case of pipe flow means that a
Q.13
Cavitation can be prevented by
Q.14
The Reynolds number for an ideal fluid flow is
Q.15
What type of motion the fluid element undergoes, when it changes from one position to another position, such that the angle between the two sides change?
Q.16
A hydraulic accumulator comprises of
Q.17
It is possible to integrate an automatic flow controller to a
Q.18
Cocks are used to control
Q.19
In a dry packed bed, the pressure drop will be changed by increasing the flow rate as
Q.20
Identification of pipelines carrying different liquids and gases is done by the __________ of the pipe.
Q.21
Pascal law is not applicable for a/an __________ fluid.
Q.22
A globe valve is the most suitable for applications, in which
Q.23
Fanning equation is given by ∆p/ρ = 4f. L/D . v²/2g<.sub>c . It is applicable to __________ region flow.
Q.24
The maximum delivery pressure of a reciprocating compressor may be about __________ kg/cm².
Q.25
Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ε0) with age/time (t) (where, ε = roughness of the surface after time't'. α = a co-efficient to be experimentally determined)?
Q.26
The capacity of a centrifugal pump Can be increased by increasing the
Q.27
Hydraulic diameter for non-circular ducts is equal to __________ times the area of flow divided by the perimeter.
Q.28
The terminal velocity of a particle moving through a fluid varies as dpn. What is the value of n' for Newton's law regime?
Q.29
Quicksand is an example of a __________ fluid.
Q.30
Drag is the force component exerted on an immersed object,
Q.31
The pressure and power requirement of a gas fan at constant speed & capacity varies __________ the gas density.
Q.32
Momentum correction factor used in fluid flow problems accounts for the
Q.33
What is the ratio of total kinetic energy of fluid passing per second to the value obtained on the basis of average velocity (for laminar flow through a circular pipe)?
Q.34
Boundary layer separation is caused by the
Q.35
In case of centrifugal fan or blower, the gas capacity varies as
Q.36
Absolute viscosity of a fluid is a function of the __________ of the fluid.
Q.37
A free jet of water of cross-sectional area 0.01m² and a velocity of 20 m/s strikes a plate and then flows in a plane parallel to the plate as shown in the figure below. The horizontal component of the force on the support is
Q.38
In case of a pipe exit fitted with a nozzle, the
Q.39
Reynolds number is the ratio of
Q.40
The valve used for very remote and accurate control of fluid is a __________ valve.
Q.41
For a fluid rotating at constant angular velocity about vertical axis as a rigid body, the pressure intensity varies as the
Q.42
To handle smaller quantity of fluid at higher discharge pressure, use a __________ pump.
Q.43
What is the ratio of the velocity at the axis of the pipe to the mean velocity of flow in case of pipe flow under viscous condition?
Q.44
With increase in the temperature, viscosity of a liquid
Q.45
A fluid whose apparent viscosity increases with shear rate is termed as the __________ fluid.
Q.46
Pick out the correct statement pertaining to transition/ entrance length in fluid flow.
Q.47
Head developed by a centrifugal pump depends on its
Q.48
Creeping flow around a sphere is defined, when particle Reynolds number is
Q.49
Laminar flow of a Newtonion fluid ceases to exist, when the Reynolds number exceeds
Q.50
Cavitation in a pump creates so many undesirable effects. Out of the following, which is not an undesirable effect created by cavitation?
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