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WorksheetsChap 06 - Fluid Dynamics
Total questions: 22
Worksheet time: 11mins
The net force on a body falling with a terminal velocity through a viscous liquid will be
0 N.
1 N.
2 N.
4 N.
A spherical body of mass m and radius r, falls down through air of viscosity v as shown in figure.
Which of the following graphs shows the best variation of velocity of the body against time.
If a cricket ball is rotating on its axis as shown in the figure below, what is the direction of its movement?
Downward
Rightward
Leftward
Upward
The equation A1v1=A2v2 is called
Equation of continuity.
Bernoulli's equation
Venturi relation.
Stoke's law.
In fluid dynamics, which of the following fundamental expressions links pressure to the fluid's speed and height?
Pascal's law.
Stokes' law.
Archimedes' principle.
Bernoulli's equation
The terminal velocity of a free falling water droplet in air is attained when
drag force = - weight of droplet
drag force = weight of droplet
drag force < weight of droplet
drag force > weight of droplet
What will be the velocity of water falling from a greater height as it reaches the ground?
increasing.
decreasing.
become zero.
remain constant.
The equation is valid for a fluid having
compressibility and steady flow.
incompressibility and steady flow.
compressibility and unsteady flow.
incompressibility and unsteady flow.
The given diagrams show the same scale vertical sections of a set of circular vessels, each containing the same depth of water. Which of the following statement is correct?
Water exerts the greatest pressure on the base of vessel P.
Water exerts the greatest pressure on the base of vessel S.
Water exerts the same pressure on the base of each vessel.
Water exerts different pressure on the base of
All of the following are applications of Bernoulli's effect EXCEPT
atomizer.
filter pump.
Venturi meter.
vacuum cleaner.
The given figure shows a petrol storage tank filled to a height h with petrol of density ρ .
The space above the petrol tank is vented to the atmosphere, so it contains air at atmospheric pressure, patm .
Which of the following formulae is used to find out the rate of petrol running out from this storage rank?
2gh
2gh
gh2
2gh
Which of the following is the fourth factor upon which the terminal velocity depends?
Area
Force
Pressure
Acceleration
The pressure in the upper region of an aerofoil where streamlines are close to each other results in
low speed.
high speed.
uniform speed.
extreme speed.
Which of the following options represents the condition of an ideal fluid?
I. Fluid is non-viscous.
II. Fluid's density is constant.
III. Fluid moves with high-speed.
IV. Fluid has no internal frictional force.
I and II
I and III
I, II and III
I, II and IV
Which of the following designs is used in the given diagrams?
Solid
Viscous
Turbulent
Streamline
At which of the following cross sectional areas, is the water flow fastest in the below diagram.
A1
A2
A3
A1 and A3
Which of the following is NOT obeyed by an ideal fluid?
Stokes' law
Toricelli's theorem
Bernoulli's equation
Equation of continuity
The fluid is
* incompressible
* non-viscous
* steady flow
All of the following are based on the above conditions EXCEPT
Stokes' law.
Torricelli's theorem.
Bernoulli's equation.
Equation of continuity.
In which of the following sections of the given pipe will water flow with the highest speed and lowest pressure?
A
B
C
D
Which of the following options shows the CORRECT sequence of fluids in the increasing order of viscosity?
A
B
C
D
Which of the following is used to obtain a smooth motion?
Ripples
Upthrust
Turbulent
Streamline
At which cross sectional area(s) of the given pipe, the water flow is fastest?
I only
II only
III only
I and III
