Q. Which of the following describes the behavior of a ductile material? (2023)
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A.
It can be stretched into wires
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B.
It breaks without deformation
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C.
It is very hard
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D.
It cannot be shaped
Solution
Ductile materials can be stretched into wires without breaking.
Correct Answer: A — It can be stretched into wires
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Q. Which of the following factors does NOT affect the tensile strength of a material? (2022)
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A.
Temperature
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B.
Material composition
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C.
Length of the specimen
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D.
Cross-sectional area
Solution
The length of the specimen does not affect tensile strength; it is an intrinsic property of the material.
Correct Answer: C — Length of the specimen
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Q. Which of the following is a characteristic of brittle materials? (2020)
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A.
High ductility
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B.
Low tensile strength
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C.
Low elasticity
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D.
Fracture without significant deformation
Solution
Brittle materials fracture without significant deformation.
Correct Answer: D — Fracture without significant deformation
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Q. Which of the following is a characteristic of elastic materials? (2023)
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A.
They return to original shape after deformation
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B.
They permanently deform
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C.
They break easily
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D.
They are always brittle
Solution
Elastic materials return to their original shape after the removal of the applied force.
Correct Answer: A — They return to original shape after deformation
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Q. Which of the following is true about brittle materials? (2023)
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A.
They can undergo large deformations
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B.
They exhibit high ductility
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C.
They fracture without significant plastic deformation
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D.
They are always elastic
Solution
Brittle materials fracture without significant plastic deformation.
Correct Answer: C — They fracture without significant plastic deformation
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Q. Which of the following is true about the shear modulus of a material? (2023)
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A.
It measures the material's response to shear stress
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B.
It is always greater than Young's modulus
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C.
It is independent of temperature
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D.
It is the same as bulk modulus
Solution
Shear modulus (G) measures the material's response to shear stress, indicating how it deforms under such stress.
Correct Answer: A — It measures the material's response to shear stress
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Q. Which of the following materials has the highest tensile strength? (2020)
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A.
Steel
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B.
Aluminum
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C.
Copper
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D.
Rubber
Solution
Steel has the highest tensile strength among the given materials.
Correct Answer: A — Steel
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Q. Which property of a material describes its ability to return to its original shape after deformation? (2023)
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A.
Plasticity
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B.
Elasticity
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C.
Ductility
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D.
Brittleness
Solution
Elasticity is the property that allows a material to return to its original shape after deformation.
Correct Answer: B — Elasticity
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