Worksheets[Eng Apps] Sem 2 Midterm Review
Total questions: 18
Worksheet time: 5hrs 30mins
The elastic limit of specific copper is 150 x 106 Pa. Find the minimum radius a steel wire can have (in millimeters) to support a 6,500 N weight without exceeding its elastic limit.
3.7 mm
4.2 mm
12.7 mm
2.9 mm
10.5 mm
An 50 in copper wire (E = 20 x 106 psi) has a radius of 0.5 in. A force causes the string to stretch 0.30 in. Find the force applied to the string.
94,247 lb
3,827 lb
77,804 lb
11,423 lb
15,247 lb
Which of the following are items that do not affect the tensile strength of a member?
cross-sectional area
length
material
shape
density
Compressive strength of a member is affected by?
cross-sectional area
length
material
shape
Carbon Fiber has a Young’s modulus of 72 GPa and a yield strength of 130 MPa. At what strain value does the deformation become permanent?
0.00181
0.00138
0.00775
0.00223
Not possible
A steel column is 10 m long and 1.2 m in diameter. It carries a compressive load of 50 x 106 N. If the modulus of elasticity is 300 GPa, determine how much the column is compressed.
1.47 mm
3.24 mm
2.98 mm
5.95 mm
11.25 mm
An aluminum sample with a diameter of 1.0 in has been tensile tested. Calculate the engineering stress for an applied load of 4020 lbs.
5,118 lbs
3,660 lbs
7,960 lbs
1,990 lbs
2,542 lbs
Rupture is....
When a sample experiences catastrophic failure.
When a sample experiences elastic deformation.
When a sample experiences plastic deformation.
When a sample experiences compression.
When a sample experiences tension.
A material with a low plastic deformation region on a stress vs. strain curve (as measured along the x-axis).
brittle
ductile
buckling
maleable
unable to determine
A 40g balsa wood model bridge is has it’s first member break when a 50 kgf load is applied.
What is the approximate efficiency of the bridge?
125%
80%
40%
25%
Using the stress-strain curve above, what is the yield strength for aluminum?
≈ 130 Mpa
≈ 250 Mpa
≈ 230 Mpa
≈ 200 Mpa
Using the stress-strain curve above, what is the tensile strength for steel?
≈ 350 Mpa
≈ 250 Mpa
≈ 230 Mpa
≈ 200 Mpa
Using the data in the extension-load table above, calculate the strain at datum #2008 for a bar of 7.00 mm in width, a thickness of 0.400 mm and a length of 60.0 mm.
0.02015
0.17804
0.01011
0.06545
Using the data in the extension-load table above, calculate the stress of the rectangular bar of 8.00 mm in width, a thickness of 0.700 mm and a length of 50.0 mm at datum #2010.
1.219 MPa
1.755 MPa
2.185 MPa
0.241 MPa
5.233 MPa
What does point A represent?
Yield Strength
Tensile Strength
Strength at Failure
Modulus of Elasticity
What does point B represent?
Yield Strength
Tensile Strength
Strength at Failure
Modulus of Elasticity
What does point D represent?
Yield Strength
Tensile Strength
Strength at Failure
Modulus of Elasticity
What does point E represent?
Yield Strength
Tensile Strength
Strength at Failure
Modulus of Elasticity
