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
m2, what is the pressure inside the balloon?
a. | 0.5 N/m2 | c. | 2.5 N/m2 | b. | 1.5 N/m2 | d. | 3
N/m2 |
|
|
3.
|
What is the SI unit of pressure?
a. | g/cm3 | c. | the newton | b. | m/s2 | d. | the pascal |
|
|
4.
|
A pressure of 70 N/m2 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 1-liter volume | b. | compressing 2 liters
of water into a 1-liter 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 soft-drink 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
13-1
|
|
16.
|
In Figure 13-1, 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. |
|