MCQ 1 Modulus of rigidity is defined as the ratio of

(A) Shear stress to shear strain (B) Stress to strain (C) Longitudinal stress to longitudinal strain (D) Stress to volumetric strain

MCQ 11 The relationship between young’s modulus of elasticity E, bulk modulus k and poission’s ratio is µ given by

(A) E = 2K(1 − 2µ) (B) E = 3K(1 + µ) (C) E = 3K(1 − 2µ) (D) E = 2K(1 + µ)

MCQ 7 12. At a point in a strained body carrying two unequal unlike principal stress p1 and p₂ (p₁ > p₂), the maximum shear stress is given by

(A) p₁/2 (B) p₂/2 (C) (p₁ – p₂)/2 (D) (p₁ + p₂)/2

MCQ 14 If a point in a strained material is subjected to equal normal and tangential stresses, then the angle of obliquity is

(A) 0° (B) 45° (C) tan^-1 (1/2) (D) tan^-1 (2)

MCQ 9 If the principal stresses at a point in a strained body are p1 and p2 (p1>p2), then the resultant stress on plain carrying the maximum shear stress is equal to 

(A) √(p_1² – p_2² ) (B) √(p_1² + p_2² ) (C) √(p_1² + p_2² )/2 (D) √(p_1² – p_2² )/2

MCQ 8 The plane of maximum obliquity is inclined to the major principle plane at an angle

(A) π/2 + φ max/4 (B) π/2 + φ max (C) π/4 – φ max/2 (D) π/4 + φ max/2

MCQ 2 Slope at the end of a simply supported beam of span l with uniformly distributed load w/unit length over the entire span is given by

(A) wl² / 16 EI (B) wl³ / 16 EI (C) wl² / 24 EI (D) wl³ / 24 EI

MCQ 6 If an element is subjected to pure shearing stress τ_xy, the maximum principal stress is equal to

(A) 2 τ_xy (B) τ_xy / 2 (C) τ_xy (D) √ (1 √ (τ_xy)²)

MCQ 15 Limit of proportionality depends upon

(A) Area of cross-section (B) Type of loading (C) Type of material (D) All of the above

MCQ 3 For an isotropic, homogeneous and elastic material obeying hook?s law, number of independent elastic constants is

(A) 2 (B) 3 (C) 9 (D) 1

MCQ 12 If all the dimensions of a prismatic bar are doubled, then the maximum stress produced in it under its own weight will

(A) Decrease (B) Remain unchanged (C) Increase to two times (D) Increase to four times

MCQ 10 Limiting values of poission?s ratio are

(A) −1 and 0.5 (B) −1 and −0.5 (C) 1 and −0.5 (D) 0 and 0.5

MCQ 13 If a material has identical properties in all directions, it is said to be

(A) Homogenous (B) Isotrophic (C) Elastic (D) Orthotrophic

MCQ 4 If a composite bar of steel and cooper is heated, then the cooper bar will be under

(A) Tension (B) Compression (C) Shear (D) Torsion

MCQ 5 Effective length of a weld is equal to

(A) Overall length − weld size (B) Overall length − throat thickness (C) Overall length − 2 × weld size (D) Overall length − 2 × throat thickness