| The factor of safety for brittle materials (having elongation less than 5%) is based on |
A) Endurance limit
B) Limit of proportionality
C) Ultimate stress
D) Yield stress
| Principle of superposition is applicable when (i) Deflections are linear functions of applied forces (ii) Material obeys Hooke’s law (iii) The action of applied forces will be affected by small deformations of the structure |
A) Only (i)
B) (i) and (ii)
C) (ii) and (iii)
D) (i), (ii) and (iii)
| Which of the following pairs is not matched correctly for material type and number of planes of symmetry for their material properties? |
A) Anisotropic: no plane of symmetry
B) Monoclinic: one plane of symmetry
C) Orthotropic: two planes of symmetry
D) Isotropic: infinit planes of symmetry
| The value of Poisson’s ratio for steel varies from |
A) 0.2 to 0.25
B) 0.25 to 0.35
C) 0.35 to 0.4
D) 0.4 to 0.55
| If the material doesn’t show any change in volume when it is subjected to stress, then its Poisson’s Ratio must be |
A) Zero
B) 0.33
C) 0.5
D) Infinite
| Unit of Young’s Modulus is same as that of |
A) Bulk Modulus, Section Modulus, Stress and Pressure
B) Shear Modulus, Bulk Modulus, Section Modulus and Subgrade Modulus
C) Shear Modulus, Poisson’s Ratio, Stress and Bulk Modulus
D) Bulk Modulus, Subgrade Modulus, Stress and Pressure
| If the radius of a wire stretched by a load is doubled, then its Young’s Modulus will |
A) be doubled
B) be halved
C) become one fourth
D) None of the above
| What is the yield point for high strength steel? |
A) 0.5% of the offset load
B) 0.2% of the offset load
C) 0.1% of the offset load
D) 1.5% of the offset load
| For the bars of a composite section i. The load carried by different materials is the same as the total external load ii. The total external load is equal to the sum of the load carried by different materials iii. Strain in all materials is equal |
A) Only (i)
B) (i) and (ii)
C) (ii) and (iii)
D) (i), (ii) and (iii)
| For an isotropic material having Poisson’s Ratio of 0.5, volumetric strain is equal to |
A) 0
B) 0.5
C) 1
D) 2
