In tensile test, which of the following does not affect the value of ultimate tensile strength?...
In tensile test, which of the following does not affect the value of ultimate tensile strength?
A) dimensional accuracy of the specimens
B)quality of surface finish
c) speed of testing
d) length of specimen
2)time temperature transformation diagrams are drawing are drawn for?
a) iron
b)magnese
c) any alloy
d)only steel
3)most metal have (..............) structures
a)polyproline
b)crystalline
c)amorphous
Homework Answers
Answers:-
1) Length of the specimen doesn't affect the ultimate strength of the material. So option (D) is the correct answer.
2) TTT diagrams can be drawn for any given alloy. So option (C) is the correct answer.
3) Most metals have crystalline structures. So option (B) is the correct answer.
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In tensile test, which of the following does not affect the
value of ultimate tensile strength?...
A cold drawn rectangular steel bar with a ultimate tensile strength of Su = 482 MPa...
A cold drawn rectangular steel bar with a ultimate tensile strength of Su = 482 MPa and dimension as shown below. Estimate the maximum completely alternating tensile force (HF) that can be applied to the ends and have an infinite fatigue life with a safety factor of 1.3. 140 Bhn h = 10 mm b = 60 mm d = 12 mm
Identify the material. that fits the stress-strain curve. A) MILD STEEL Yield Strength: 30 kN, Ultimate...
Identify the material. that fits the stress-strain
curve.
A)
MILD STEEL
Yield Strength: 30 kN, Ultimate Strength: 40 kN, Young Modulus:
30/0.7 kN/mm = 43 kN/mm
B)
ALUMINUM
Yield Strength: 20 kN, Ultimate Strength: 26 kN, Young Modulus:
20 kN/mm
C)
CAST IRON
Yield Strength: N/A, Ultimate Strength: 20 kN, Young Modulus:
20/0.4 kN/mm = 50 kN/mm
D)
COPPER
Yield Strength: 30 kN, Ultimate Strength: 35 kN, Young Modulus:
30 kN/mm
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A cold drawn rectangular steel bar with a ultimate tensile strength of Su = 482 MPa and dimension as shown below. Estimate the maximum completely alternating tensile force (HF) that can be applied to the ends and have an infinite fatigue life with a safety factor of 1.3. 140 Bhn h = 10 mm b = 60 mm d = 12 mm
Identify the material. that fits the stress-strain
curve.
A)
MILD STEEL
Yield Strength: 30 kN, Ultimate Strength: 40 kN, Young Modulus:
30/0.7 kN/mm = 43 kN/mm
B)
ALUMINUM
Yield Strength: 20 kN, Ultimate Strength: 26 kN, Young Modulus:
20 kN/mm
C)
CAST IRON
Yield Strength: N/A, Ultimate Strength: 20 kN, Young Modulus:
20/0.4 kN/mm = 50 kN/mm
D)
COPPER
Yield Strength: 30 kN, Ultimate Strength: 35 kN, Young Modulus:
30 kN/mm
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