When a thin cvlindrical shell is subjected to an internal pressure, the volumetr

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Question
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

Correct Answer

2?₁ + ?₂

Strength of Materials problems

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1. 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

4. 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. In a simple bending theory, one of the assumption is that the plane sections before bending remain plane after bending. This assumption means that
Options
A. stress is uniform throughout the beam
B. strain is uniform throughout the beam
C. stress is proportional to the distance from the neutral axis
D. strain is proportional to the distance from the neutral axis

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