WorksheetsPhysics, Fluid Mechanics, Pre Assessment
Total questions: 30
Worksheet time: 18mins
Name
Class
Date
1.
The unit m3 is a unit of:
a)
Volume
b)
Mass
c)
Density
d)
Area
2.
The density of water is ____ g/cm3.
a)
1
b)
1000
c)
100
d)
10
3.
Cutting a watermelon in half causes the density of the watermelon to:
a)
Increase
b)
Decrease
c)
Remain constant
4.
A g or kg is a unit of:
a)
Mass
b)
Volume
c)
Density
d)
Area
5.
Standing on one foot causes the pressure on the floor to:
a)
Increase
b)
Decrease
c)
Remain constant
6.
It is "safe" to lay on a bed of nails due to:
a)
The increased area the nails create
b)
The increased pressure the nails create
c)
The smaller area the nails create
d)
The less force that acts on your body
7.
When dealing with pressure, area, and force have what type of relationship?
a)
Direct
b)
Inverse
c)
No relationship
8.
Find the volume of this piece of brass.
a)
50 g
b)
10 cm
c)
6 cm3
d)
12 cm3
9.
How can you get these pistons to balance?
a)
Put equal masses on both sides
b)
Put heavier mass on the left piston
c)
They will never balance because one is fatter than the other
d)
Put a heavier mass on the right piston
10.
A fluid exerts 500 N of force over an area that measures .5 m2. What is the pressure exerted by the fluid?
a)
1,000 Pa
b)
2,000 Pa
c)
750 Pa
d)
250 Pa
11.
What is the unit of measurement for pressure?
a)
pascal
b)
grams
c)
milliters
d)
meters
12.
A 2 m long steel cube rests on the floor. The pressure the cube exerts on the floor is 2000 Pa. Find the force of the cube.
a)
0.001 N
b)
1000 N
c)
4000 N
d)
8000 N
13.
What system used in many applications like forklifts or jacks works on Pascal's principle
a)
hydraulics
b)
sprockets
c)
widgets
d)
brakes
14.
What force causes the wood to float
a)
weight
b)
density
c)
buoyant
d)
gravity
15.
whose principle says buoyant force = the weight of the fluid an object displaces
a)
Archimedes
b)
Pascal
c)
Bernoulli
d)
Einstein
16.
The English unit for pressure.
a)
psi (pounds per square inch)
b)
mph
c)
lbs
d)
$$$
17.
Which direction does buoyant force always push?
a)
downward
b)
upward
c)
all directions
d)
sponge bob
18.
Which of the following is NOT an example of laminar flow?
a)
a river moving slowly in a straight line
b)
smoke rising upward in a smooth column through air
c)
water flowing evenly from a slight opened faucet
d)
smoke twisting as it moves upward from a fire
19.
Which of the following properties is NOT a characteristic of an ideal fluid?
a)
laminar flow
b)
turbulent flow
c)
nonviscous
d)
incompressable
20.
Which of the following statements is NOT correct?
a)
A fluid flows
b)
a fluid has a definite shape
c)
molecules of a fluid are free to move past each other
d)
a fluid changes it shape easily
21.
How does a liquid differ from a gas?
a)
a liquid has both definite shape and definite volume, whereas a gas has neither
b)
a liquid has a definite volume, unlike a gas
c)
a liquid has a definite volume unlike a gas
d)
a liquid has a definite shape whereas a gas has a definite volume
22.
Which of the following statements about floating objects is correct?
a)
the objects density is greater than the density of the fluid on which it floats
b)
the objects density is equal to the density of the fluid on which it floats
c)
The displaced volume of fluid is greater than the volume of the object
d)
They buoyant force equals the objects weight
23.
If an object is only partially submerged in a fluid, which of the following is true.
a)
The volume of the displaced fluid equals the volume of the object
b)
the density of the fluid equals the density of the object
c)
the density of the fluid is greater than the density of the object
d)
the density of the fluid is less than the density of the object
24.
For an ideal fluid flowing through a horizontal pipe, Bernoulli's principle and the continuity equation state that the pressure within the pipe does which of the following? (assume measurements are taken along the pipe in the direction of fluid flow.
a)
Pressure increases as the pip diameter increases
b)
pressure decreases as the pipe diameter increases
c)
pressure remains constant as the pipe diameter increases
d)
pressure increases, the decreases as the pipe diameter increases
25.
Which of the following is true according to Pascals principle?
a)
pressure in a fluid is greatest at the walls of the container holding the fluid
b)
pressure in a fluid is greatest at the center of the fluid
c)
pressure in a fluid is the same throughout the fluid
d)
pressure in a fluid is greatest at the top of the fluid
26.
What does the difference between gauge pressure and absolute pressure equal?
a)
the pressure within the fluid
b)
the pressure at the surface of the fluid
c)
the pressure at the bottom of the fluid
d)
zero
27.
Which of the following is NOT an example of turbulent flow?
a)
a river flowing slowly in a straight line
b)
a river flowing swiftly around rocks in rapids
c)
water flowing unevenly from a fully opened faucet
d)
smoke twisting as it moves upward from a fire.
28.
Which of the following is a fluid?
a)
helium
b)
ice
c)
iron
d)
gold
29.
Which of the following is NOT a fluid?
a)
carbon dioxide
b)
hydrogen
c)
seawater
d)
wood
30.
For incompressible fluids, density changes little with changes in what?
a)
depth
b)
temperature
c)
pressure
d)
free-fall acceleration
100 %
