WorksheetsFM Lab Viva 1
Total questions: 30
Worksheet time: 15mins
What is the primary purpose of a Venturimeter in fluid mechanics?
To measure pressure
To measure velocity
To measure discharge
To visualize streamlined bodies
What are the three main parts of a Venturi meter?
Inlet, Nozzle, Outlet
Converging part, Throat, Diverging part
Pipe, Manometer, Orifice
Diffuser, Valve, Gauge
In a Venturi meter, where is the fluid velocity the highest?
At the inlet
At the throat
At the diverging section
Uniform throughout
What is the primary cause of frictional resistance in turbulent pipe flow?
Molecular attraction between fluid molecules
Roughness of the pipe surface
Low velocity of the fluid
Temperature changes in the fluid
Minor losses in pipe flow occur due to:
Friction in long pipes
Entry and exit effects
Pressure head
Elevation difference
A Venturimeter works on the principle of:
Pascal’s Law
Bernoulli’s Theorem
Newton’s Law
Archimedes’ Principle
The throat diameter of a venturimeter is:
Larger than the inlet
Same as inlet
Smaller than inlet
Varies with flow rate
The orifice meter is installed in:
Horizontal pipe only
Vertical pipe only
Any orientation
Inclined pipe only
A nozzlemeter is generally preferred over orifice meter because:
It is cheaper
It is longer
It has higher accuracy
It does not require a manometer
Notches are used to measure:
Flow rate in closed pipes
Discharge in open channels
Velocity in pipes
Pressure in tanks
The most commonly used notch in lab experiments is:
Circular
Rectangular
Triangular
Parabolic
Bernoulli’s theorem assumes:
Frictionless flow
Compressible fluid
Viscous effects
Shock losses
In calibration of a venturimeter, which value is compared with actual discharge?
Theoretical discharge
Head loss
Pressure
Pipe diameter
Centrifugal pumps convert:
Mechanical energy to heat energy
Mechanical energy to pressure energy
Pressure energy to kinetic energy
Kinetic energy to pressure energy
Multi-stage centrifugal pumps are used for:
Low discharge
Low head
High head
High speed
The reciprocating pump differs from centrifugal pump because:
It is rotary
It delivers continuous flow
It is a positive displacement pump
It is used for high-speed operations
In a reciprocating pump, the discharge is:
Continuous
Pulsating
Uniform
Vacuum
Centrifugal air blowers are used to move:
Liquids only
Gases and air
Viscous fluids
Solids
The efficiency of a centrifugal pump is maximum when:
Flow rate is zero
Head is maximum
Flow rate is optimal
Power is minimum
Specific speed of a pump is defined as the speed at which:
Head is maximum
Power is maximum
Pump operates with unit discharge and unit head
Pump efficiency is zero
Suction head in a centrifugal pump should be:
More than atmospheric pressure
Less than atmospheric pressure
Equal to atmospheric pressure
Zero
A diffuser in centrifugal pump is used to:
Increase speed
Reduce pressure
Convert velocity head to pressure head
Generate suction
The function of impeller in a centrifugal pump is to:
Increase discharge
Increase pressure head
Reduce friction
Measure flow
In impact of jets experiment, the force is measured on:
A nozzle
A vane
A pipe
A turbine
The force exerted by the jet depends on:
Vane shape only
Jet velocity and vane shape
Pipe length
Fluid density only
Pelton wheel is a:
Reaction turbine
Impulse turbine
Mixed flow turbine
Axial flow turbine
The runner of a Pelton wheel has:
Buckets
Blades
Vanes
Rotors
Francis turbine is classified as:
Axial flow turbine
Radial flow turbine
Reaction turbine
Impulse turbine
In Francis turbine, water enters:
Axially
Tangentially
Radially and exits axially
Perpendicularly
In hydraulic turbines, draft tube is used to:
Increase discharge
Reduce exit velocity
Add head
Remove air bubbles
