# 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 (**

*σ*) in one plane, then normal stress on an oblique section of the body inclined at an angle*'θ'*to the normal of the section is- (A)

*σ cosθ*

- (B)

*σ cos²θ*

- (C)

*σ sinθ*

- (D)

*σ sin²θ*

**7. The longitudinal stress in a riveted cylindrical shell of diameter (**

*d*), thickness (*t*) and subjected to an internal pressure (*p*) is- (A)

*pd/(η × t)*

- (B)

*pd/(η*×

*2t)*

- (C)

*pd/(η*×

*4t)*

- (D)

*pd/(η*×

*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*= π²*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 τ = Shear stress,**

*C*= Shear modulus, and*V*= Volume of the body)

- (A)

*(τ/2C) × V*

- (B)

*2C/ τV*

- (C)

*(τ²/2C) × V*

- (D)

*2C/ τ²V*

**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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