WorksheetsFluid Mech PF Exam
Total questions: 100
Worksheet time: 5hrs 40mins
It is defined that the model and prototype have similar properties
(a)
Check the three types of similarities
Geometric similarity
Kinematic similarity
Dynamic similarity
Dimensional similarity
Check the two geometric similarity
Depth
Area
Velocity
Torque
Check the two kinematic similarity
Depth
Area
Velocity
Acceleration
Check the two dynamic similarity
Power
Area
Velocity
Force
Which is NOT a dynamic similarity
Time
Discharge
Torque
Acceleration
Which is NOT a geometric similarity
Breadth
Diameter
Torque
Depth
Similitude is also known as (a)
(a) flow is defined as flow along curved path
Free and (a) vortex flow
If the fluid particles are moving around a (a) path with the help of some external torque the flow is called forced vortex flow
If no external force is acquired to rotate the fluid particle, the flow is called (a) vortex flow
Forced vortex flow is also known as (a) flow
The fluid mass in free vortex flow rotate at constant angular velocity
True
False
Check the three examples of forced vortex flow
A vertical cylinder containing liquid which is rotated about its central axis with a constant angular velocity
Flow of liquid inside impeller of a centrifuge pump
Flow of water through runner
Flow of water in the drain tank
We have all seen moving (a) exerting forces.
The lift (a) on an aircraft is exerted by the air moving over the wing
In fluid mechanics the analysis of (a) is performed in the same way as in solid mechanics using Newton's laws
In the formula F=ma which is used to relate applied force to (a)
(a) is defined as the amount of force applied to a surface and measured as force per unit area
It is defined as force of 1 Newton per square meter
(a)
Choose the two low pressure units
1 Pa
1 atm
1 torr
1 millibar
When the fluid is in equilibrium, the pressure at a particular point is identical in all directions and independent of the orientation
True
False
When the fluid is in equilibrium, the pressure at a particular point is identical in all directions and independent of the orientation, this is called (a) pressure
(a) pressure is the difference between the total pressure and static pressure
Velocity pressure is the sum between the total pressure and static pressure
True
False
U-tube manometer is use to determine P1-P2 or in words it means to calculate (a)
U-tube and (a) -type manometers
(a) gauges are design to indicate pressures below zero.
Gauges that indicate absolute pressure can indicate pressures below zero
True
False
Pressure gauge in zero is a perfect vacuum.
True
False
Which units in pressure has the highest value
atm
Pa
bar
psi
Choose the three advantages of manometer
High accuracy
Simple and time proven
Reasonable cost
Levelling is not required
Choose the three disadvantages of manometer
Large and bulky
Leveling is required
Compatibility required between manometer and the fluid being measured
Suitable only for high pressure
(a) is the simplest form of manometer.
Simple manometers one end is (a) to the atmosphere
U-tube manometers are used to measure high pressure
True
false
The u-tube is filled with liquid whose specific gravity is higher than the specific gravity of liquid whose pressure is to be measured, usually (a) is used.
(a) manometer is used to measure the difference in pressure between two points in a pipe
Mechanical gauges are instruments which are used to measure very high pressure by balancing the column of fluid by dead weight or spring.
True
False
Mechanical gauge is used to measure pressure in steam boliers where the use manometers is not suitable
True
False
(a) pressure is the pressure exerted by the envelope of air surrounding the earth surface
At (a) level, the value of atmospheric pressure is 101.325 m2KN and is known as standard atmospheric pressure
Vacuum pressure is also called negative gauge pressure
True
False
The pressure above atmospheric pressure is known as (a) pressure where the pressure below atmospheric as absolute pressure
All pressure gauges read (a) when open to atmosphere
The gauge liquid in simple manometer should be lighter than the liquid whose pressure is to be measured.
True
false
Choose various pressure difference type flow elements
Orifice plate
Flow nozzle
Venturi tube
Weirs
(a) is the reduction in fluid pressure and increase in velocity that results when a fluid flows through a constricted section of pipe
Choose the three advantages of venturi tubes
They can handle large flow volume at low pressure drops
They can be mounted in large diameter pipes via flanged, welded or threaded-end fittings
They can be used with nearly all liquids, as well those containing extreme solid content
There are rapid changes in contour
Choose the three disadvantages of venturi tubes
Bulky, especially in the larger sizes
Primary cost for installation and usage of venturi tube proves to be very high
There can be trouble in installation and inspection of venturis
Venturi tube have sharp corners
Orifice meter is widely used for large-volume liquid and gas flows.
True
False
Orifice meter is complex to construct compared to venturi meter
True
False
It consists of a thin circular plate with a hole in it.
(a)
Orifice plate is held in the pipeline between two (a)
Venturimeter is a cheaper device compared to pipe orifice
True
False
(a) an obstruction in the flow path in an open channel
The weir will cause an increase in the water (a) as the water flows over the weir
The height of water above the top of weir is the measurement usually used to correlate with (a)
Choose common types of sharp crested weirs
v notch weir
suppressed rectangular
contracted rectangular
triangular notch weir
--------- phase pipe flow includes: mass in-mass out = accumulated mass
(a)
In multiphase mass transfer comes in addition of (a)
Multiphase pipe flow depends on
Fluid properties
Pipe geometry
Environment
Phases
Fluid properties includes
Density
Viscosity
Surface tension
Wall roughness
(a) phase flow refers to simultaneous flow of oil-gas-water in the same pipeline
(a) describes how the phases are distributed in the pipe cross section and along the pipeline
Liquid cross-sectional area divided by total cross-sectional area
(a)
Open loops is open with air and exposed to atmospheric pressure
True
False
Choose the characteristics of open loops
Simple to build
Relatively low cost
Few safety barriers
Use for unstable fluid like crude oils
Closed loops is also known as (a) flow loops
Choose the characteristics of open loops
Simple to build
Relatively low cost
Few safety barriers
Use for unstable fluid like crude oils
The loss of head or energy is due to
friction
sudden enlargement
sudden contraction
an obstruction in a pipe
The loss of head or energy is due to
friction
sudden enlargement
sudden contraction
an obstruction in a pipe
The loss of head or energy is due to
friction
sudden enlargement
sudden contraction
an obstruction in a pipe
The loss of head or energy is due to
friction
sudden enlargement
sudden contraction
an obstruction in a pipe
The loss of head or energy is due to
the exit of a pipe
sudden enlargement
sudden contraction
the entrance of a pipe
The loss of head or energy is due to
friction
sudden enlargement
sudden contraction
an obstruction in a pipe
The loss of head or energy is due to
friction
sudden enlargement
the entrance of a pipe
the exit of a pipe
What is the name of this pressure difference type flow elements?
(a)
What is the name of this pressure difference type flow elements?
(a)
Stoke is the unit of
viscosity
surface tension
kinematic viscosity
none
Poise is the unit of
velocity gradient
mass density
kinematic viscosity
viscosity
Which of the following is dimensionless ?
specific speed
specific volume
specific gravity
specific weight
_______________ is a device used to measure the pressure at a point in a fluid.
manometer
mechanical gauges
Bourdon's pressure gauge
dead weight pressure
_____________ is the most common type of pressure gauge.
Manometer
Mechanical gauges
Bourdon's pressure gauge
Dead weight pressure
_____________ is used to calibrate the other pressure gauges in a laboratory
Manometer
Mechanical gauges
Bourdon's pressure gauge
Dead weight pressure
Peizometer measures ______________ pressure
Gauge
Absolute
Vacuum
High
A simple manometer is used to measure both ______________ and ____________ pressure
gauge
absolute
vacuum
high
A device for measuring the atmospheric pressure
(a)
All fluids are:
gases
liquids
gases or liquids
non-metallic
An open circular tank is rotated about its vertical axis of 350 rpm. Find its angular velocity in rad per sec
36.63
34. 63
33. 63
35.63
An open circular tank 15 cm radius.The tank is rotated about its vertical axis of 350 rpm. Find the depth of parabola formed at the free surface of water
153.87 cm
143.87 cm
133.87 cm
163.87 cm
Stoke is the unit of
viscosity
surface tension
kinematic viscosity
none
Poise is the unit of
velocity gradient
mass density
kinematic viscosity
viscosity
The property of the waterline that causes it to behave as an elastic sheet
Adhesion
Cohesion
Surface tension
Compression
Which of the following is dimensionless ?
specific speed
specific volume
specific gravity
specific weight
Absolute pressure = atmospheric pressure + __________ pressure
low
absolute
gauge
vacuum
(a) pressure is also called negative gauge pressure.
The pressure below atmospheric pressure is known as ________ pressure
Gauge
Absolute
Vacuum
High
Peizometer measures ______________ pressure
Gauge
Absolute
Vacuum
High
