# Practice Test: Question Set - 22

1. In a thick cylindrical shell subjected to an internal pressure (p), the tangential stress across the thickness of a cylinder is
(A) Maximum at the outer surface and minimum at the inner surface
(B) Maximum at the inner surface and minimum at the outer surface
(C) Maximum at the outer surface and zero at the inner surface
(D) Maximum at the inner surface and zero at the outer surface

2. When a bar of length l, width b and thickness t is subjected to a push of P, its
(A) Length, width and thickness increases
(B) Length, width and thickness decreases
(C) Length increases, width and thickness decreases
(D) Length decreases, width and thickness increases

3. In a simple bending theory, one of the assumptions is that the plane sections before bending remain plane after bending. This assumption means that
(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

4. For a beam, as shown in the below figure, the maximum deflection lies at

(A) l/3 from B
(B) l/3 from A
(C) √(l² - a²/3) from B
(D) √(l² - b²/3) from A

5. In the above question, the ratio of stiffness of spring 'B' to spring 'A' will be
(A) 2
(B) 4
(C) 6
(D) 8

6. When a body is subjected to a direct tensile stress (Ïƒ) in one plane, then normal stress on an oblique section of the body inclined at an angle 'Î¸' to the normal of the section is
(A) Ïƒ cosÎ¸
(B) Ïƒ cos²Î¸
(C) Ïƒ sinÎ¸
(D) Ïƒ sin²Î¸

7. The longitudinal stress in a riveted cylindrical shell of diameter (d), thickness (t) and subjected to an internal pressure (p) is
(A) pd/(Î· × t)
(B) pd/(Î· × 2t)
(C) pd/(Î· × 4t)
(D) pd/(Î· × 8t)

8. Lame's theory is associated with
(A) Thin cylindrical shells
(B) Thick cylindrical shells
(C) Direct and bending stresses
(D) None of these

9. According to Euler's column theory, the crippling load of a column is given by p = Ï€² EI/Cl² In this equation, the value of ‘C’ for a column with both ends hinged, is
(A) ¼
(B) ½
(C) 1
(D) 2

10. A riveted joint may fail by
(A) Tearing of the plate at an edge
(B) Tearing of the plate across a row of rivets
(C) Shearing of rivets
(D) Any one of these

11. The tensile strength of ductile materials is _________ its compressive strength.
(A) Equal to
(B) Less than
(C) Greater than
(D) None of these

12. The strain energy stored in a body due to shear stress, is (where Ï„ = Shear stress, C = Shear modulus, and V = Volume of the body)
(A) (Ï„/2C) × V
(B) 2C/ Ï„V
(C) (Ï„²/2C) × V
(D) 2C/ Ï„²V

13. The maximum shear stress is __________ the algebraic difference of maximum and minimum normal stresses.
(A) Equal to
(B) One-fourth
(C) One-half
(D) Twice

14. The object of caulking in a riveted joint is to make the joint
(A) Free from corrosion
(B) Stronger in tension
(C) Free from stresses
(D) Leak proof

15. The Poisson's ratio for steel varies from
(A) 0.23 to 0.27
(B) 0.27 to 0.30
(C) 0.31 to 0.34
(D) 0.32 to 0.42

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