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17 Cards in this Set
- Front
- Back
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If engineers require a material that would be able to be stretched and reduced in cross-section without breaking, they would choose a material with which of the following properties? A) Elasticity B) Toughness C) Plasticity D) Brittleness E) Ductility
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E) Ductility |
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The ability of a material to retain its deformed shape when the load causing deformation is removed is called: A) Stiffness B) Plasticity C) Elasticity D) Hardness E) Ductility
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B) Plasticity |
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A measure of the deformation in a member by a load is defined as: A) Maximum load B) Tensile stress C) Working stress D) None of the above E) Safety factor
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D) None of the above |
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The ability of a material to return to its original shape after the force or load that caused the deformation is removed is called: A) Toughness B) Plasticity C) Ductility D) Elasticity E) Stiffness
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D) Elasticity |
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The internal resistance developed to counteract an external force is defined as: A) Ultimate strength B) Strain C) Deformation D) Load E) Stress
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E) Stress |
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Stiffness is defined as the ability of a material to: A) Return to its original shape after the load causing deformation is removed B) Resist a change in shape and size when a load is applied C) Absorb energy before breaking D) Retain its deformed shape when the load causing the deformation is removed E) Resist penetration
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B) Resist a change in shape and size when a load is applied |
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The greatest load that can be applied to a material under its design conditions is called: A) Elastic limit B) Factor of safety C) Maximum allowable load D) Allowable stress E) Ultimate stress
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C) Maximum allowable load |
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The ability of a material to resist penetration is called: A) Elasticity B) Ductility C) Toughness D) Hardness E) Stiffness
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D) Hardness |
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The ______ of a material is the maximum stress value that the material can be subjected to and still return to its original size and shape when the deforming load is removed. A) Maximum allowable load B) Elastic limit C) Ultimate stress D) Maximum allowable stress E) Allowable stress
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B) Elastic limit |
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A tie bar with a tensile strength of 231 MPa carries a load of 11 kN. What will be the diameter of the bar if the factor of safety is 6? A) 114.42 mm B) 19.07 cm C) 11.4 cm D) 19.07 mm E) 21 mm |
D) 19.07 mm |
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What is the factor of safety for a steel hanger having an ultimate strength of 70 000 Newton per cm² and supporting a load of 87 500 N. The hanger has a cross sectional area of 5 cm². A) 4 B) 1.25 C) 8 D) 6.25 E) 0.8 |
A) 4 |
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A 1.5 m long round bar is 45 mm in diameter and will stretch 1.2 mm under a load of 240 kN. Calculate the strain in the bar. A) 0.008 B) 0.0004 C) 0.0008 D) 0.0008 N E) 0.004 |
C) 0.0008 |
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A 1.5 m long round bar is 45 mm in diameter and will stretch 1.2 mm under a load of 240 kN. Calculate the stress in the bar. A) 200 MPa B) 288 MPa C) 53.3 MPa D) 106.6 MPa E) 150.9 MPa |
E) 150.9 MPa |
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A hole 3 cm in diameter is to be punched out of a steel plate 8 cm thick. The shear stress of the material is 670 GPa. What load is required on the punch? A) 5 051.6 MN B) 63 146 N C) 4 735 509 GN D) 9 036 MN E) 1.6 × 10¹³ N |
A) 5 051.6 MN |
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A compressive load of 219 kN is resisted by a rectangular strut which has one side measuring 83 mm. If the stress in the strut is 164 909 kPa, what is the length of the other side of the strut? A) 1.3 mm B) 0.016 m C) 0.75 m D) 3.3 mm E) 9.07 m |
B) 0.016 m |
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A titanium bar with a mass of 2 kg and a length of 3 m shortens by 0.02 mm under a compressive load of 3 900 kN. What will be the strain? A) -0.000006666 B) -1.9 × 10² C) 6.66 × 10³ D) 1.9 × 10³ E) -1.9 × 10³ |
A) -0.000006666 |
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Factor of safety = |
Ultimate stress ÷ allowable stress |
