Chapter 15: Fluids
Practice Questions



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1.  

Which of the following is not a unit of pressure?

bar
atmospheres, Pat
lb/in2
poise
Pa


2.  

Which of the following is a unit for Bernoulli's equation?

N/m
Ns/m
J/m3
J


3.  

What is an alternate unit for Bernoulli's equation?

N/m2
N/m3
N/m
poise


4.  

Which of the following is a unit of density?

N/m2
N/m3
kg/m3
kg/m2


5.  

One kilogram of Iron (density~7.8 gm/cm3) and 1 kilogram of Aluminum (density~2.7 gm/cm3) are dropped into a pool. Which has the largest buoyant force on it?

Iron
Aluminum
Both are the same.
Neither has a buoyant force on it.


6.  

One cubic centimeter of Iron and 1 cubic centimeter of Aluminum are dropped into a pool. Which has the largest buoyant force on it?

Iron
Aluminum
Both are the same.
Neither has a buoyant force on it.


7.  

One gram of Iron and 1 cubic centimeter of Aluminum are dropped into a pool. Which has the largest buoyant force on it?

Iron
Aluminum
Both are the same.
Neither has a buoyant force on it.


8.  

One gram of Oak (density~.8 gm/cm3) and 1 gm of Aluminum are dropped into a pool. Which has the largest buoyant force on it?

Oak
Aluminum
Both are the same.


9.  

One cubic centimeter of Oak and 1 cubic centimeter of Aluminum are dropped into a pool. Which has the largest buoyant force on it?

Oak
Aluminum
Both would be the same.


10.  

Ice (density=.92 gm/cm3) floats freely in a glass of water. The ice melts. Does the level go up, down or stay the same?

Up
Down
Stays the same.


11.  

Ice in a glass of Alcohol (density=.8 gm/cm3) melts. Does the level go up, down or stay the same?

Up
Down
Stays the same.


12.  

You are on a float in a pool using hand weights. The weights fall overboard. Does the pool water level go up, down, or stay the same?

Up
Down
Stays the same.


13.  

The large beaker in the picture is set up so that the water displaced by the submerging weight overflows into the small beaker.

In frame E what are the readings on scales a, b, and c, respectively?

6 N, 0 N, 4 N
10 N, 0 N, 1 N
10 N, 1 N, 3 N
10 N, 0 N, 4 N


14.  

The large beaker in the picture is set up so that the water displaced by the submerging weight overflows into the small beaker.

When would scale (a) again read 10 N?

B only.
C only.
D only.
E only.
All of the above.


15.  

The large beaker in the picture is set up so that the water displaced by the submerging weight overflows into the small beaker.

Which frame would the reading on scale (b) read 0.5 N?

B
C
D
E


16.  

The large beaker in the picture is set up so that the water displaced by the submerging weight overflows into the small beaker.

What is the combined weight of the readings on scales b and c in frames B or C in the animation?

2 N
4 N
6 N
8 N


17.  

The large beaker in the picture is set up so that the water displaced by the submerging weight overflows into the small beaker.

When would scale c in the animation read 3.25 N?

B
C
D
None of the above.


18.  

For the purpose of this problem use 10 m/s2 for g and 100000 N/m2 for 1 atm.

The pressure at A is 9.5 atm and the water velocity is 10 m/s. What is the water velocity at point C?

2.5 m/s
5 m/s
10 m/s
20 m/s
40 m/s


19.  

For the purpose of this problem use 10 m/s2 for g and 100000 N/m2 for 1 atm.

What is the velocity at point B?

2.5 m/s
5.0 m/s
10. m/s
20. m/s
40. m/s


20.  

For the purpose of this problem use 10 m/s2 for g and 100000 N/m2 for 1 atm.

What is the velocity at point D?

2.5 m/s
5.0 m/s
10. m/s
20 m/s
40. m/s


21.  

For the purpose of this problem use 10 m/s2 for g and 100000 N/m2 for 1 atm.

What is the pressure at point C?

1.0 atm
7.5 atm
8.5 atm
9.0 atm
10.atm


22.  

For the purpose of this problem use 10 m/s2 for g and 100000 N/m2 for 1 atm.

What is the pressure at point D?

1.0 atm
7.5 atm
8.5 atm
9.0 atm
10.atm


23.  

For the purpose of this problem use 10 m/s2 for g and 100000 N/m2 for 1 atm.

What is the pressure at point B?

1.0 atm
7.5 atm
8.5 atm
9.0 atm
10.atm


24.  

Assuming that the density of air is a constant 1.3 kg/m 3 and that the air pressure is 1 bar, what is the pressure at the top of a 500 meter high skyscraper?

0.9 bar
0.93 bar
0.97 bar
1.03 bar


25.  

Torricelli's Law derives from

Bernoulli's Equation
Pascal's Principle
Archimede's Principle
The Equation of Continuity


Practice Questions: Practice Questions by Carl Adler, East Carolina University. ©2002 by Prentice Hall, Inc.


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