WorksheetsFluid
Total questions: 30
Worksheet time: 30mins
Hydraulic intensifier is a device used for..
Storing energy of a fluid in the form of pressure energy
Increasing pressure intensity of a fluid
Transmitting the power from one shaft to another
None of the above
An impulse turbine.
Operates submerged
Requires draft tube
Is most suited for low head application
Operates by initial complete conversion to kinetic energy
Specific speed for impulse wheels ranges from
0 to 4.5
10 to 100
80 to 200
250 to 300
Bernoulli's theorem deals with the law of conservation of
Mass
Momentum
Energy
None of them
Pilot tube is used for measurement of
Pressure
Flow
Velocity at a point
Discharge
A stream line is a line
Which is along the path of a particle
Which is always parallel to the main direction of flow
Across which there is no flow
On which tangent drawn at any point gives the direction of velocity
Kinematic viscosity is defined as equal to.
Dynamic viscosity x density
Dynamic viscosity/density
Dynamic viscosity x pressure
Pressure x density
In a static fluid .
Resistance to shear stress is small
Fluid pressure is zero
Linear deformation is small
Only normal stresses can exist
Surface tension has the units of.
force per unity area
Force per unit length
Force per unit volume
None of the above
Newtons law of viscosity states that..
Shear stress is directly proportional to the velocity
Shear stress is directly proportional to the velocity gradient
Shear stress is directly proportional to shear strain
Shear stress is directly proportional to the viscosity
Practical fluids are ..
Viscous
Posses surface tension
Are compressible
Possess all the above properties
The stress strain relation of a Newtoneon fluid is.
Linear
Parabolic
Hyperbolic
Inverse type
Balloon lifting in air follows the following principles.
Law of gravitation
Archimedes principle
Principle of buoyancy
All of the above
The property of fluid by which molecules of different kinds of fluids are attracted to each other is called.
Adhesion
Cohesion
Viscosity
Compressibility
Centre of pressure of a plane surface is immersed in a liquid is
About the centre of gravity of the plane surface
At the centre of gravity of the plane surface
Below the centre of gravity of the plane surface
None of the above
The buoyancy depends on
Weight of the liquid displaced
Pressure with which the liquid is displaced
Viscosity of the liquid
Compressibility of the liquid
The width of the bucket for a pelton wheel is generally ___ the diameter of jet
Double
three times
four times
five times
Steady flow occurs when
The direction and magnitude of the velocity at all points are identical
The velocity of successive fluid particles, at any point, is the same at successive periods of time
Velocity, depth, pressure, etc. change from point to point in the fluid flow
The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plan
The product od mass and acceleration of flowing liquid is called
Inertia force
Viscous force
Gravity force
Pressure force
Which of the instrument can be used for measuring speed of an aeroplane
Venturimeter
Orifice plate
Pitot tube
Rotameter
When a liquid is flowing through the pipe, the velocity of the liquid is
Maximum at the centre and minimum near the walls
Minimum at the centre and maximum near the walls
Zero at the centre and maximum near the walls
Maximum at the centre and zero near the walls
Hydraulic accumulator is a device used for
Lifting heavy weights
Storing the energy of the fluid in the form of pressure energy
Increasing the pressure intensity of a fluid
None of the above
Low specific speed of turbine implies it is
Propeller turbine
Francis turbine
Impulse turbine
Any of the above
A draft tube is used with .
Impulse turbine
Pelton wheel turbine
Reaction turbine
Very high specific speed turbine
Specific speed of a turbine depends upon
Speed,power and discharge
Discharge and powe
Speed, power and heat
Speed,discharge and heat
Cavitation in hydraulic turbine results in .
Noise and vibration
Noise and movement
Drop in output and efficiency
Rough surface
As specific speed of a centrifugal pump increases its blade height .
Increases
Decreases
Remains unaffected
Increase or decrease depends on other factors
The flow in pipe is laminar if
Reynolds number is equal to 2500
Reynolds number is equal to 4000
Reynolds number is more than 2500
None of the above
Stoke is the unit of .
Surface tension
Viscosity
Kinematic viscosity
None of the above
The bulk molecules of elasticity
Has the dimensions of 1/pressure
Increases with pressure
Is the large when liquid is the more compressibl
Is directly proportional to flow
