The unit of strain is N-mm N/mm mm no unit

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2. A circular shaft fixed at, A has diameter D for half of its length and diameter D/2 over the other half, as shown in the below figure. If the rotation of B relative to A is 0.1 radian, the rotation of C relative to B will be
Options
A. 0.4 radian
B. 0.8 radian
C. 1.6 radian
D. 3.2 radian

5. When a bar of length l, width b and thickness t is subjected to a push of P, its
Options
A. length, width and thickness increases
B. length, width and thickness decreases
C. length increases, width and thickness decreases
D. length decreases, width and tickness increases

6. When a body is subjected to three mutually perpendicular stresses, of equal intensity, the ratio of direct stress to the corresponding volumetric strain is known as
Options
A. Young's modulus
B. modulus of rigidity
C. bulk modulus
D. Poisson's ratio

9. The pull required to tear off the plate per pitch length is (where p = Pitch of rivets, t = Thickness of plates, and ?_t, ? and ?_c = Permissible tensile, shearing and crushing stresses respectively)
Options
A. (p - 2d)t x ?_c
B. (p - d)t x ?
C. (p - d)t x ?_t
D. (2p - d)t x ?_t

10. When a thin cvlindrical shell is subjected to an internal pressure, the volumetric strain is (where ?₁ = Hoop strain, and ?₂ = Longitudinal strain)
Options
A. 2?₁ - ?₂
B. 2?₁ + ?₂
C. 2?₂ - ?₁
D. 2?₂ + ?₁

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