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Fluid Mechanics

Total questions: 20

Worksheet time: 10mins

Name

Class

Date

All fluids are:

gases

liquids

gases or liquids

non-metallic

Which of the following is a fluid?

helium

ice

iron

gold

Which of the following is NOT a fluid?

carbon dioxide

hydrogen

seawater

wood

Which of the following statements is NOT correct?

A fluid flows

a fluid has a definite shape

molecules of a fluid are free to move past each other

a fluid changes it shape easily

To obtain the absolute pressure from the gauge pressure:

subtract atmospheric pressure

add atmospheric pressure

subtract 273

add 273

Several cans of different sizes and shapes are all filled with the same liquid to the same depth. Then,

The pressure on the bottom of each can is the same

The weight of the liquid on the bottom of each can is the same

The least pressure is at the bottom of the can with the largest bottom area

the force of the liquid on the bottom of each can is the same

The vessels shown above all contain water to the same height. Rank them according to the pressure exerted by the water on the vessel bottoms, least to greatest.

1,2,3,4

3,4,2,1

4,3,2,1

2,3,4,1

All pressures are the same

The diagram shows a U-tube with cross-sectional area A and partially filled with oil of density $\rho$ . A solid cylinder, which fits the tube tightly but can slide without friction, is placed in the right arm. The system is in equilibrium. The weight of the cylinder is:

$AL\rho g$

$L^3\rho g$

$A\rho\left(L+h\right)g$

$A\rho\left(L-h\right)g$

Archimedes' Principle states that...

The buoyant force acting on an object equals the volume of the fluid displaced by the object.

The buoyant force acting on an object equals the weight (force of gravity) of the fluid displaced by the object.

The buoyant force acting on an object will always be equal.

10.

According to Archimedes' principle, if a body is immersed partially or fully in a fluid then the buoyancy force is _______ the weight of fluid displaced by the body.

equal to

less than

more than

unpredictable

11.

If the weight of an object is < the Buoyant Force, the object will ......................

Sink

Rise

Remain at the same level

12.

Which direction does buoyant force always push?

downward

upward

all directions

sponge bob

13.

According to Bernoulli's theorem in a flowing liquid

velocity is inversely proportional to pressure

velocity is directly proportional to pressure

velocity is directly proportional to volume

14.

Which of the following is NOT an example of laminar flow?

a river moving slowly in a straight line

smoke rising upward in a smooth column through air

water flowing evenly from a slight opened faucet

smoke twisting as it moves upward from a fire

15.

Which of the following properties is NOT a characteristic of an ideal fluid?

laminar flow

turbulent flow

nonviscous

incompressable

16.

What is an ideal fluid?

A fluid which has no viscosity

A fluid which is incompressible

A fluid which has no surface tension

All the above

17.

Bernoulli's equation cannot be used for flow of water in river because the flow is

streamlined

turbulent

laminar

viscous

18.

Due to Bernoulli's principle, the pressure is ............... above an airplane's wing than below it.

Lower

Higher

19.

States that as the velocity of a fluid increases, the pressure decreases. This causes planes to fly .

Archimedes' Principle

Bernoulli's Principle

Pascal's Principle

20.

Bernoulli's principle states that as the velocity of a fluid ______, the pressure exerted by the fluid ______

increases; increases

decreases; decreases

increases; decreases

decreases; increases

100 %

Fluid Mechanics

Total questions: 20

Worksheet time: 10mins

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