
FQ1 - DEFORMA
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University
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Practice Problem
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Hard
melanie lugo
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10 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is the modulus of elasticity if the stress is 44,000 psi and unit strain of 0.00105?
41.905 x 10⁶
42.300 x 10⁶
41.202 x 10⁶
43.101 x 10⁶
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A 30-m long aluminum bar is subjected to a tensile stress of 172 MPa. Find the elongation if E = 69.116 MPa.
0.746 m
0.007 m
6.270 mm
7.46 cm
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A steel wire is 4.0 m long and 2 mm in diameter. How much is it elongated by a suspended body of mass 20 kg? Young’s modulus for steel is 196,000 MPa.
1.123 mm
1.274 mm
1.385 mm
1.374 mm
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A steel wire is 6 m long, hanging vertically supports a load of 2000 N. Neglecting the weight of the wire, determine the required diameter if the stress is not to exceed 140 MPa and the total elongation is not to exceed 4 mm. E = 200,000 MPa
4.4 mm
3.4 mm
4.26 mm
5.4 mm
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A copper rolled wire 10 m long and 1.5 mm diameter when supporting a weight of 350 N elongates 18.6 mm. Compute the value of the Young’s modulus of this wire.
106.48 GPa
200 GPa
180.32 GPa
148.9 GPa
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A cylinder of diameter 1.0 cm at 30°C is to be slid into a hole on a steel plate. The hole has a diameter of 0.099970 cm at 30°C. To what temperature the plate must be heated? Coefficient of linear expansion for steel is cm/°C.
55°C
62°C
65°C
48°C
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
An iron steam pipe is 200 ft long at 0°C. What will its increase in length when heated to 100°C? Coefficient of linear expansion is ft/°C.
0.20 ft
0.28 ft
0.12 ft
0.18 ft
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