dynamics of ideal fluids bernoulli equation total head velocity head pressure head applications - One Line Questions
1.
Which of the following is a consequence of Bernoulli's principle? —
A fluid at lower pressure flows faster
2.
The derivation of Bernoulli's equation relies on the control volume analysis of: —
A streamtube
3.
The equation P/ρg + v²/2g + z = constant is valid for: —
4.
The flow of water from a faucet is an example where Bernoulli's principle can be observed because: —
As the water falls, its velocity increases, and its cross-sectional area decreases
5.
What is a primary application of Bernoulli's equation in engineering? —
Determining the flow rate in pipes and channels
6.
The equation P/ρg + v²/2g + z = constant is also known as the: —
Energy Equation per unit weight
7.
Consider a horizontal pipe where the cross-sectional area decreases. According to Bernoulli's equation, the velocity of the fluid will: —
Increase
8.
If the velocity of an ideal fluid decreases in a horizontal pipe, its pressure will: —
Increase
9.
If a fluid flows from a region of high pressure to a region of low pressure, its velocity will: —
Increase
10.
Which of the following is a valid application of Bernoulli's equation? —
Calculating the discharge through a small orifice under a head
11.
What is the 'total head' in Bernoulli's equation also referred to as? —
Mechanical energy per unit weight of fluid
12.
The application of Bernoulli's equation to a Venturi meter allows for the calculation of: —
Flow rate
13.
The primary limitation of Bernoulli's equation in real-world applications is the neglect of: —
Viscous effects and turbulence
14.
A horizontal pipe has a section where its diameter abruptly increases. If an ideal fluid flows through it, the pressure in the wider section will be: —
Higher than in the narrower section
15.
If a fluid is flowing in a pipe that widens, and the flow is steady and ideal, the pressure will: —
Increase
16.
For a fluid flowing vertically upwards in a pipe, if the velocity increases, the pressure will: —
Decrease by a greater amount than if the pipe were horizontal
17.
In a vertical pipe flowing upwards, if the velocity increases, and density and gravity are constant, the pressure will: —
Decrease significantly
18.
The term 'P/ρg' in Bernoulli's equation represents the: —
Pressure energy per unit volume, expressed as a head
19.
In a horizontal Venturi meter, the pressure is lowest at the section with the: —
Smallest cross-sectional area
20.
Which device uses Bernoulli's principle to measure the velocity of a fluid? —
Pitot tube
21.
Bernoulli's equation is essentially a statement of conservation of: —
Energy
22.
What fundamental principle governs the conservation of energy for an incompressible, inviscid fluid in steady flow? —
Bernoulli's Equation
23.
The lift force on an airplane wing is primarily explained by: —
Bernoulli's Principle
24.
What is the formula for Bernoulli's equation for an ideal fluid in steady flow? —
P/ρ + v²/2 + gz = constant
25.
The 'pressure head' in Bernoulli's equation has units of: —
Length (e.g., meters)
26.
When applying Bernoulli's equation between two points in a fluid flow, if point 1 is at a higher elevation than point 2, and velocity is constant, then: —
Pressure at point 2 must be higher than at point 1
27.
What does the 'z' term in Bernoulli's equation represent? —
Potential energy per unit volume, expressed as a head
28.
In the equation P + ρv²/2 + ρgz = constant, the term ρv²/2 represents: —
Kinetic energy per unit volume
29.
What does the term 'v²/2g' in Bernoulli's equation represent physically? —
Kinetic energy per unit weight
30.
The 'dynamic head' in fluid dynamics is equivalent to the: —
Velocity head
31.
In Bernoulli's equation, which term represents the energy per unit volume due to the fluid's motion? —
Velocity head (v²/2g)
32.
The total head (H) in Bernoulli's equation is the sum of: —
Pressure head, velocity head, and elevation head
33.
The total energy line (TEL) for a fluid flow accounts for: —
Pressure head, velocity head, and elevation head
34.
If the velocity of an ideal fluid increases in a horizontal pipe, what happens to its pressure, assuming no energy loss? —
Pressure decreases
35.
The term 'ρv²/2' in Bernoulli's equation is known as the: —
Dynamic pressure
36.
The energy grade line (EGL) is another term for the: —
Total head line
37.
A Pitot-static tube measures: —
Velocity of flow
38.
Which of the following is NOT an assumption for the derivation of Bernoulli's equation? —
Presence of viscosity
39.
The phenomenon of a ball curving in flight (Magnus effect) is related to Bernoulli's principle due to: —
The ball's spin creating different air velocities on its sides
40.
For flow in an open channel, Bernoulli's equation can be applied if: —
The surface is exposed to atmosphere and pressure is atmospheric
41.
A limiting factor for the direct application of Bernoulli's equation is: —
The presence of significant friction losses
42.
In the context of a Pitot tube, the difference between the stagnation pressure and the static pressure is equal to: —
The velocity head
43.
In a Venturi meter, Bernoulli's equation is used to relate the pressure difference to: —
The velocity of the fluid
44.
What is the 'static head' in fluid dynamics? —
The pressure head
45.
Steady flow in the context of Bernoulli's equation means that: —
The velocity at any point in the fluid remains constant over time
46.
In a siphon, the flow of liquid is primarily driven by: —
The pressure difference created by elevation changes
47.
What is the fundamental reason for the lift on an aircraft wing? —
The air flowing over the curved upper surface travels a longer distance and thus faster, resulting in lower pressure above the wing (Bernoulli's Principle)
48.
In steady flow, the velocity at a point can change with: —
Position only
49.
A stagnation point in fluid flow is a point where the: —
Velocity is zero
50.
Bernoulli's equation is derived assuming the fluid is: —
Incompressible and inviscid