Font size
Worksheets[Eng Apps] Semester 2 Review (20-21)
Total questions: 53
Worksheet time: 13hrs 15mins
It is expressed as the ratio of the applied force divided by the resisting area.
stress
strain
elongation
tensile strength
What is the amount of deformation in the direction of the applied force divided by the initial length of the material
strain
stress
force
pascals
A weight of 18,000 lb is supported on a rectangular baseplate that is 9-in. wide and 2-ft long. The baseplate rests on a concrete slab. Determine the stress that the baseplate exerts on the concrete slab. Express your answer in units of psi.
83.3 psi
85.4 psi
166.7 psi
170.1 psi
A certain rod material is expected to break at a normal stress of 63,750 psi. If the tensile testing machine can apply no more than 925 lb of force to the specimen, calculate the maximum rod diameter that should be used for the specimen.
0.136 in
0.0046 in
0.068 in
0.0145 in
Determine the maximum load that a 0.50-in. diameter steel rod can support if the normal stress in the rod must not exceed 24,000 psi.
18,849.6 lbs
4712.4 lbs
122,231 lbs
4938.2 lbs
A 1.25 in. by 3 in. rectangular steel bar is used as a diagonal tension member in a bridge truss. The diagonal member is 20 ft long, and its modulus of elasticity is 30,000,000 psi. If the strain in the diagonal member is measured as 0.001200 in./in., determine the total elongation of the bar.
0.33 in
0.29 in
1.25 in
0.42 in
Determine the maximum load that a 25mm diameter copper rod can support if the normal stress in the rod must not exceed 545 MPa.
1,070,100 N
1070 kN
267,526 N
267,526 kN
A 20cm square-shaped rod (0.75cm x 0.75cm) is made of brass. It has a modulus of elasticity value of 2.5x106 kPa. What amount of tension force is needed to stretch the rod by 3 mm?
662.8 N
2,109,000 N
2,109 N
662,800 N
What is the approximate elastic limit of Titanium Alloy?
≈ 600 MPa
≈ 1000 MPa
≈ 620 MPa
≈ 0.005 (mm/mm)
What is the approximate tensile strength of Kevlar?
≈ 3,800 MPa
≈ 2500 MPa
≈ 2300 MPa
≈ 230,000,000 Pa
What is the approximate strength at failure for Stainless Steel?
≈ 200 MPa
≈ 200,000,000 MPa
≈ 130 Pa
≈ 130,000,000 Pa
What is the approximate modulus of elasticity for Carbon Fiber?
≈ 280,000 MPa
≈ 280 MPa
≈ 0.01 (mm/mm)
≈ 280,000,000 Pa
Which of the following are TRUE?
Titanium is more elastic than Steel
Steel is more elastic than Titanium
Titanium is stronger than Steel
Steel is stronger than Titanium
Which of the following are TRUE?
Titanium is more elastic than Carbon Fiber
Carbon Fiber is more elastic than Titanium
Titanium is more ductile than Carbon Fiber
Carbon Fiber is more ductile than Titanium
Which of the following are TRUE?
Steel is more rigid than Carbon Fiber
Carbon Fiber is more rigid than Steel
Steel is stronger than Carbon Fiber
Carbon Fiber is stronger than Steel
Which of the following are TRUE?
Carbon Fiber is more rigid than Kevlar
Carbon Fiber is more elastic than Kevlar
Kevlar is more ductile than Carbon Fiber
Carbon Fiber is more ductile than Kevlar
Using the data in the extension-load table above, calculate the stress of the rectangular bar of 7.00 mm in width, a thickness of 0.600 mm and a length of 40.0 mm at datum #2010.
1.219 MPa
1.625 MPa
2.185 MPa
0.241 MPa
5.233 MPa
Beam A and B are the same material and same dimensions. What distinguishes beam A from beam B?
Beam A will have a greater resistance to bending because it has a lower moment of inertia.
Beam A will have a greater resistance to bending because it has a higher moment of inertia.
Beam B will have a greater resistance to bending because it has a lower moment of inertia.
Beam B will have a greater resistance to bending because it has a higher moment of inertia.
A force of 260 lb. is applied to the center of a 6 ⅙ feet long beam. The beam cross-section dimensions are 15.0 in x 1.3 in (W x H) and has a modulus of elasticity of 3.64 x 106 psi.
Calculate the moment of inertia (I).
2.75 in4
365.63 in4
27.5 in3
3.66 in4
A force of 240 lb. is applied to the center of a 6 feet long beam. The beam cross-section dimensions are 15.5 in x 1.3 in (W x H) and has a modulus of elasticity of 3.4 x 106 psi.
Calculate the max beam deflection (δmax).
0.19 in
2.83 in
9.12 in
1.1 in
Compare the maximum deflection distance for two boards made of yellow pine with a cross-section of 10 cm. by 2 cm (WxH).
If the two boards experience 1000 N point load at the center of the beam, but one board is 3 times longer, then which of the following is true?
The longer board deflects 27 times more.
The longer board deflects 9 times more.
The longer board deflects 3 times more.
The shorter board deflects 8 times more.
A force of 1.59 kN is applied to the center of a 3.2 meter long beam. The beam cross-section dimensions are 48.0 cm x 2.9 cm (W x H) and has a modulus of elasticity of 490 x 109 Pa.
Calculate the max beam deflection (δmax) in millimeters.
2.27 mm
3.16 mm
9.12 mm
6.33 mm
Based on the equation: 2J = M + 3, the truss system shown is...
Statically Determinate
Statically Indeterminate
Unstable
Unsafe
Based on the equation: 2J = M + 3, the truss system shown is...
Statically Determinate
Statically Indeterminate
Unstable
Unsafe
Based on the equation: 2J = M + 3, the truss system shown is...
Statically Determinate
Statically Indeterminate
Unstable
Unsafe
What type of truss bridge is this?
Through Truss
Deck Truss
Pony Truss
Steel Truss
What type of truss bridge is this?
Through Truss
Deck Truss
Pony Truss
Steel Truss
What type of truss bridge is this?
Through Truss
Deck Truss
Pony Truss
Steel Truss
For which type of bridge is force is transmitted along the cables, to the towers, and from the towers to the ground?
Cable-Stay bridge
Through Truss Bridge
Suspension Bridge
Deck Truss Bridge
Force is transmitted along cables, which rest freely on the towers, to the anchorages at the ends of the bridge.
Cable-Stay bridge
Through Truss Bridge
Suspension Bridge
Deck Truss Bridge
Given the truss diagram, what is the magnitude of the reaction force at Joint G?
RG = 250 N
RG = 150 N
RG = 200 N
RG = 1000 N
117.1 N
97.6 N
75.0 N
48.0 N
62.5 N
50.0 N
73.2 N
48.5 N
84.3 N
62.1 N
29.7 N
48.5 N
80.2 N
70.0 N
161.8 N
65.5 N
Which of these accurately represents the free body diagram for joint A?
Which of these accurately represents the free body diagram for joint B?
Which member(s) in the truss design should experience compression due to the load?
AB
BL
FG
AL
LK
Which member(s) in the truss design should experience zero-force due to the load?
JD
IE
KC
HF
LB
Which member(s) in the truss design should experience tension due to the load?
FG
KJ
BL
EF
HG
Which of these accurately represents the free body diagram for joint G?
A VARIABLE in our experiment to test how far our mousetrap vehicles traveled:
Length and width of the hallway where we tested
The location of the starting line
The engine that powered each of our mousetrap cars, the mousetrap itself.
Access to materials
length of the rod attached to the arm of the mousetrap spring
A VARIABLE in our experiment to test how far our mousetrap vehicles traveled:
size of the wheels
The location of the starting line
The engine that powered each of our mousetrap cars, the mousetrap itself.
Length and width of the hallway where we tested
Access to materials
If the string of your vehicle was tied to the rear axle or did not come free of the rear drive axle of your vehicle after the string reached the end of unwinding, it would:
allow your mousetrap to roll and coast freely, making it go even farther
start quicker than other cars without string tied around the rear drive axle.
have a negative effect on the motion of your mousetrap vehicle, causing the racer to STOP and possibly even roll backwards a bit after it stopped.
suddenly flip over and blow up and burn.
What would happen to your mousetrap vehicle if you did not wind the string around the rear drive axle very tightly?
The car would begin very slowly and move smoothly to build up to full speed gradually, getting faster the farther as it moved down the hallway, until the string ran out and it would coast the rest of the way.
Your car would suddenly stop as it traveled down the hallway and possibly even roll backwards a bit after it stopped.
Your car would suddenly flip over and come to a complete stop.
When you released the rod connected to the mousetrap spring, it would fly upwards quickly and the string would unwind so fast that rear axle would not turn as much as if the string was wound tightly around the rear drive axle. The motion of the car would not travel as far as a result.
No matter how well you built your mousetrap car, eventually two forces working against it would cause it come to a stop as it traveled down the hallway. What were these two forces working against every car, no matter how awesome the design and build of the car were?
friction and magnetism
gravity and torque
gravity and friction
friction and torque
Identify the unknown component of the typical truss bridge.
Bottom Chord
Deck
Floor Beam
Bottom Lateral Bracing
Strut
Identify the unknown component of the typical truss bridge.
Top Chord
Portal Strut
Floor Beam
Top Lateral Bracing
End Post
Identify the unknown component of the typical truss bridge.
Top Chord
Portal Strut
Vertical
Top Lateral Bracing
End Post
Identify the unknown component of the typical truss bridge.
Top Chord
Portal Strut
Portal Bracing
Top Lateral Bracing
End Post
What type of truss design is shown?
Pratt Deck Truss
Howe Deck Truss
Warren Through Truss
Deck K-Truss
What type of truss design is shown?
Pratt Through Truss
Pratt Deck Truss
Warren Through Truss
Warren Deck Truss
What type of truss design is shown?
Camelback Truss
Bowstring Truss
Howe Truss
Warren (with verticals) Truss
