Multiple Choice Identify the
choice that best completes the statement or answers the question.


1.

In order to calculate pressure exerted on a surface, what quantity is divided by
the surface area?
a.  altitude  c.  mass  b.  force  d.  volume 


2.

If the air inside a balloon exerts a force of 1.5 N on an area of 0.5
m^{2}, what is the pressure inside the balloon?
a.  0.5 N/m^{2}  c.  2.5 N/m^{2}  b.  1.5 N/m^{2}  d.  3
N/m^{2} 


3.

What is the SI unit of pressure?
a.  g/cm^{3}  c.  the newton  b.  m/s^{2}  d.  the pascal 


4.

A pressure of 70 N/m^{2} equals
a.  7 Pa.  c.  700 Pa.  b.  70 Pa.  d.  7000 Pa. 


5.

Where is fluid pressure greatest?
a.  30 centimeters below the surface of a swimming pool  b.  1 meter below the
surface of a swimming pool  c.  2 meters below the surface of a swimming
pool  d.  The pressure is the same in all parts of a swimming
pool. 


6.

Which of the following materials is NOT a fluid?
a.  air  c.  gasoline  b.  cork  d.  water 


7.

Which of the following is NOT possible?
a.  compressing 10 liters of oxygen gas into a 1liter volume  b.  compressing 2 liters
of water into a 1liter volume  c.  filling a balloon using helium gas from a
pressurized tank  d.  allowing 5 liters of compressed air to expand to a volume of 100
liters 


8.

The pressure of a fluid at a specific depth
a.  depends only on the type of fluid.  b.  is exerted only in the downward
direction.  c.  varies with the total volume of the fluid.  d.  all of the
above. 


9.

Two identical test tubes are filled with equal volumes of water and mercury.
Which of the following statements is true?
a.  The weight of both liquids is the same.  b.  The bottom area of
both test tubes is the same.  c.  The pressure at the bottom of both test tubes
is the same.  d.  All of the above. 


10.

Atmospheric pressure is caused by
a.  air currents.  b.  the weight of the atmosphere above a particular
location.  c.  clouds.  d.  the altitude above sea
level. 


11.

The pressure of air at sea level is approximately
a.  0 kPa.  c.  101 kPa.  b.  10 kPa.  d.  1000 kPa. 


12.

Which principle states that a change in the pressure at any point in a fluid in
a closed container is transmitted equally and unchanged in all directions throughout the
fluid?
a.  Archimedes’ principle  b.  Bernoulli’s principle  c.  Newton’s
principle  d.  Pascal’s principle 


13.

The operation of a hydraulic lift system is explained by
a.  Archimedes’ principle.  b.  Bernoulli’s
principle.  c.  Newton’s principle.  d.  Pascal’s
principle. 


14.

Where will the greatest increase in pressure occur if you squeeze the middle of
an upright, closed softdrink bottle?
a.  The greatest increase in pressure will occur at the top of the
bottle.  b.  The greatest increase in pressure will occur in the middle of the
bottle.  c.  The greatest increase in pressure will occur on the bottom of the
bottle.  d.  The pressure will increase equally everywhere within the
bottle. 


15.

The hydraulic system of a dump truck is designed to multiply
a.  distance.  c.  pressure.  b.  force.  d.  speed. 



Figure
131


16.

In Figure 131, Piston 1 exerts a pressure of 10 Pa on the fluid in the
hydraulic lift. What is the fluid pressure on Piston 2?
a.  1 Pa  c.  10 Pa  b.  5 Pa  d.  90 Pa 


17.

Which of the following states Bernoulli’s principle?
a.  As the speed of a fluid decreases, the pressure within the fluid
decreases.  b.  As the speed of a fluid increases, the pressure within the fluid
decreases.  c.  As the speed of a fluid changes, the pressure of the fluid remains
constant.  d.  none of the above 


18.

The upward force acting on the wing of an airplane in flight is called
a.  drag.  c.  thrust.  b.  lift.  d.  weight. 


19.

Which of the following statements is true about an airplane wing during
flight?
a.  Air above the wing travels faster than air below the wing.  b.  Air below the wing
travels faster than air above the wing.  c.  The wing exerts pressure equally in all
directions.  d.  The lift acting on the wing reduces the weight of the
wing. 


20.

The upward force acting on an object submerged in a fluid is called
a.  buoyant force.  c.  pressure.  b.  drag.  d.  weight. 


21.

A brick weighs 26 N. Measured underwater, it weighs 11 N. What is the size of
the buoyant force exerted by the water on the brick?


22.

The strength of the buoyant force acting on an object in a fluid depends on the
object’s
a.  mass.  c.  volume.  b.  surface area.  d.  weight. 


23.

The buoyant force on an object in a fluid is equal to the weight of the
a.  fluid.  c.  fluid displaced by the object.  b.  fluid surrounding
the object.  d.  object. 


24.

The relationship between buoyant force and weight of a displaced fluid was first
stated by
a.  Archimedes.  c.  Newton.  b.  Bernoulli.  d.  Pascal. 


25.

A ball is floating partially submerged in a liquid. The buoyant force acting on
the ball equals the
a.  volume of the ball below the surface.  c.  mass of the
ball.  b.  volume of the ball above the surface.  d.  weight of the
ball. 
