Fuid Properties-Lesson 1

Open Ended

How is pressure under water and under layers of gases be compared?

Multiple Select

Which of the following statements about density is/are correct?

• Density may vary throughout a heterogeneous mixture.

• Local density is obtained from dividing mass by volume in a small volume around a given point.

• Specific gravity is the ratio of density of material to density of water.

• Density is always constant throughout a substance.

Multiple Choice

What is the SI unit of pressure?

• Newton

• Pascal

• Joule

• Watt

Multiple Choice

According to Pascal's Principle, what is the relationship between input pressure and output pressure in a hydraulic system?

• Input pressure is greater than output pressure

• Input pressure is less than output pressure

• Input pressure equals output pressure

• Input pressure is unrelated to output pressure

Open Ended

Explain the relationship between pressure and force, and provide an example from daily life.

Multiple Choice

In the hydraulic system shown, if a 5 lbs force is applied to piston A (1/2 sq. inch area), what is the force exerted by piston B (10 sq. inch area)?

• 100 lbs

• 5 lbs

• 50 lbs

• 10 lbs

Multiple Choice

Which formula is used to calculate the pressure at a certain depth in a liquid, and what do the variables represent?

• P = mg/A, where m is mass, g is gravity, and A is area

• P = ρgh, where ρ is density, g is gravity, and h is height

• P = F/A, where F is force and A is area

• P = Vgh, where V is volume, g is gravity, and h is height

Open Ended

How does a mercury barometer measure atmospheric pressure, and why does the height of mercury in the tube represent atmospheric pressure?

Multiple Select

Which of the following are correct units or equivalences for atmospheric pressure?

• 1 atm = 760 mmHg

• 1 atm = 1.013 × 10^5 Pa

• 1 atm = 29.9 inches of Hg

• 1 atm = 100 Pa

Open Ended

What is the density of 18.0-karat gold that is a mixture of 18 parts gold, 5 parts silver, and 1 part copper? Assume this is a simple mixture having an average density equal to the weighted densities of its constituents.

Multiple Choice

If an object sinks in a fluid, _____.

• the density of the fluid is greater than the density of the object
• the density of the fluid is less than the density of the object
• the density of the fluid is equal to the density of the object
• density has nothing to do with whether an object sinks or floats, only which state of matter the object is

Multiple Choice

Water pressure increases as depth increases. 

• True
• False

Multiple Choice

How do you find the volume of an irregular shaped solid?

• water displacement
• weighing it
• using a balance
• multiplying the length by its sides

Multiple Choice

How does air pressure change as you go from the top of a mountain to sea level?

• pressure increases
• pressure decreases
• pressure stays the same
• it depends of the weather

Multiple Choice

Why does a hot air balloon float in air?

• Air is less dense than water.

• The density of hot air is less than the density of cold air.

• Air is denser on cold days.

• The overall density of the balloon and its basket is less than the density of the air.

Multiple Choice

What do we call the the amount of force exerted on a certain area?

• fluid

• pressure

• buoyant force

• normal force

Multiple Choice

The upward force exerted by a fluid is called the...

• buoyant force

• density force

• fluidity force

• normal force

Multiple Choice

When pressure is applied to a confined fluid, the increase in pressure is transmitted equally to all parts of the fluid. This fact is called________.

• Pascal's Principle
• Newton's Principle
• Archimedes' Principle
• Bernoulli's Principle

Multiple Choice

Which principle do airplanes take advantage of to fly?

• Archimedes' Principle

• Bernoulli's Principle

• Pascal's Principle

Multiple Choice

When a fluid fills a closed container, it exerts pressure

• only on the bottom of the container

• only on the sides of the container

• only on particles within the fluid

• everywhere inside the container

Multiple Choice

Where is pressure the greatest on the dam?

• D
• C
• B
• A

Multiple Choice

Which of the following factors affect the pressure at the bottom of a container of liquid?

• depth of the container

• width of the container

• temperature of liquid

• color of liquid

Multiple Choice

The study of properties of fluids in motion is called

• Fluids Study

• Fluids statics

• Fluids dynamics

• None

Multiple Choice

Turbulent flow is

• Unsteady and regular

• Steady and regular

• Unsteady and irregular

• Steady and regular

Multiple Choice

According to equation of continuity, A₁V₁ = A₂V₂ = constant. The constant is equal to:

• Flow rate

• Volume of fluid

• Mass of fluid

• Density of fluid

Multiple Choice

Velocity of fluid increases where the pressure is:

• Low

• High

• Constant

• zero

Multiple Choice

In equation of continuity, the units of Av is given as:

• Cubic meter

• Cubic meter per second

• Square meter per second

• Square meter per square second

Multiple Choice

Bernoulli’s equation is obtained by applying law of conservation of.

• Mass

• Energy

• Momentum

• Force

Multiple Choice

If cross-sectional area of pipe decreases, the speed of fluid must increase according to:

• Continuity equation

• Bernoulli's equation

• Torricelli's theorem

• Venture relation

Multiple Choice

High viscosity can be described as...

• a liquid that flows quickly

• a liquid that flows slowly