Chapter 6 Engineering Fundamentals:
An Introduction to Engineering
1. Which of the following are fundamental dimensions?
a. length, volume, power, mass, time
b. temperature, time, mass, luminous intensity
c. force, energy, power, weight
d. temperature, time, mass, luminosity
e. time, temperature, length, electrical current, density
Analysis:
2. Which of the following are fundamental SI units?
a. seconds, meters, liters
b. seconds, meters, grams
c. Celsius, seconds, kilograms
d. candela, kilograms, Kelvins
e. hours, meters, Watts
Analysis:
3. Which of the following are U.S. Customary units?
a. gallons, yards, horsepower
b. barrels, Fahrenheit, Watts
c. acres, hectares, liters
d. cubic yards, Pascals, furlongs
4. The amount of time it takes for a pendulum to swing “to-and-fro” through one complete cycle
is called the “period” and is calculated using the following equation:
g
L
T
2
where
T
period in seconds
L
length of pendulum
g
gravitational acceleration,
2
8.9 s
m
What is the appropriate unit for L if the preceding equation is to be homogeneous in units?
a. meters
b. liters
c. m/s2
d. seconds
Analysis:
5. The speed of sound in a fluid can be calculated using the following equation:
B
v
where
v
speed of sound in
s
m
B
bulk modulus
Engineering Fundamentals, 5th ed. Chapter 6
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fluid density in
3
m
kg
What is the appropriate unit for B if the preceding equation is to be homogeneous in units?
a.
s
m
b.
2
sm
kg
c. m
d. s
6. When a steel cookie sheet is placed in an oven and heated, it expands due to the temperature
change. The change in area of the cookie sheet is modeled using the following equation:
TAA
0
where
A
change in area in cm2
0
A
original area in cm2
area coefficient of thermal expansion
T
change in temperature in C°
What is the appropriate unit for
if the preceding equation is to be homogeneous in units?
a. /C°
b. cm2
c. C°
d. cm
Analysis:
7. The force between two charged particles can be calculated using the following equation:
2
21
r
qq
kF
where
F
force in Newtons
G
electrostatic constant
1
q
charge of particle #1 in Coulombs
2
q
charge of particle #2 in Coulombs
r
distance between particles in meters
What is the appropriate unit for k if the preceding equation is to be homogeneous in units?
a. N
b. m2
c. N / C
d.
2
2
C
mN
Analysis:
8. The amount of heat needed to change the temperature of an object can be calculated using the
following equation:
TmcQp
where
Q
amount of heat in calories
m
mass of object in grams
p
c
specific heat of object
T
change in temperature in
C
Engineering Fundamentals, 5th ed. Chapter 6
Saeed Moaveni
What is the appropriate unit for
p
c
if the preceding equation is to be homogeneous in units?
a. cal
b. g
c.
Cg
cal
d. cal / g
Analysis:
9. A motorcyclist who weighs
lbs150
accelerates his
kg200
motorcycle at a rate of
2
20 s
m
over
a distance of 100 yards in 5 seconds. Convert all of the values given to SI units.
Motorcyclist weight: ______ N
Motorcycle weight: _______kg
Speed: _____ m/s2
Distance: ____m
Time: ______ sec
10. A new record for running the stairs of the Empire State Building was set on February 3,
2003. During this feat, the individual generated an average power of approximately
hp27.0
.
Express this power in Watts.
________ Watts
11. One milliliter
ml
is the volume in one cubic centimeter
cc
. How many
scc‘
of soda
would it take to fill a 2 liter bottle?
Engineering Fundamentals, 5th ed. Chapter 6
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a. 0.002
b. 2
c. 200
d. 2000
e. None of the above
Analysis:
12. One carat is five grams. In SI units this would be:
a.
g5
b.
kg5
c.
kg5000
d.
kg005.0
e. None of the above
Analysis:
13. One troy ounce is 20 pennyweights, one pennyweight is 24 grains, and one grain is
approximately 65 milligrams. How much is 1000 troy ounces, in SI units?
a.
g1000
b.
kg1
c.
kg2.31
d.
g2.31
Engineering Fundamentals, 5th ed. Chapter 6
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e. None of the above
Analysis:
14. One bushel is four pecks and one peck is approximately 8.8 liters. How much is 100 bushels,
in SI units?
a. 100 liters
b.
3
1.0 m
c. 3520 liters
d.
3
52.3 m
e. None of the above
Analysis:
15. The Btu (British thermal unit) is defined as the amount of heat required to raise the
temperature of
m
lb1
of water by
F1
. If a certain home’s furnace is rated at
hr
Btu
000,120
what is
this rating in calories per second? ________
16. The acceleration due to gravity at or near the surface of the moon is approximately 1/6 g.
This is equal to:
Engineering Fundamentals, 5th ed. Chapter 6
Saeed Moaveni
a.
2
16.0 s
m
b.
2
64 s
in
c.
2
16.0 s
ft
d.
2
6.1 s
ft
e. None of the above
Analysis:
17. While driving down the highway you notice that your speedometer reads 50 miles/hr and 80
km/hr. Which is faster, one mile per hour or one kilometer per hour?
a. one mile per hour
b. one kilometer per hour
Analysis:
18. Gravitational acceleration near the Earth’s surface is 9.8 m/s2 or 32.2 ft/s2. Which is greater,
an acceleration of 1 m/s2or 1 ft/s2?
a. 1 m/s2
b. 1 ft/s2
Analysis:
19. A sheet of notebook paper is four thousandths of an inch thick. What is the thickness, in
centimeters, of a 500-sheet stack of notebook paper? ________
Engineering Fundamentals, 5th ed. Chapter 6
Saeed Moaveni