# Practice Test: Question Set - 30

**1. In a beam subjected to pure bending, the intensity of stress in any fibre is _________ the distance of the fibre from the neutral axis.**

- (A) Equal to

- (B) Less than

- (C) More than

- (D) Directly
proportional to

**2. The relation between Young's modulus (**

*E*) and bulk modulus (*K*) is given by- (A)

*k = (3m - 2)/m.E*

- (B)

*k = m.E/(3m - 2)*

- (C)

*k = 3(m - 2)/m.E*

- (D)

*k = m.E/3(m - 2)*

**3. The shear force of a cantilever beam of length**

*l*carrying a uniformly distributed load of*w*per unit length is __________ at the fixed end.- (A) Zero

- (B)

*wl*/4

- (C)

*wl*/2

- (D)

*wl*

**4. The strength of the shaft is judged by the_____________.**

- (A) Torque
transmitted by the shaft

- (B) Length of
the shaft

- (C) Dia. of the
shaft

- (D) None of
these

**5. A simply supported beam '**

*A*' of length*l*, breadth*b*, and depth*d*carries a central point load*W*. Another beam '*B*' has the same length and depth but its breadth is doubled. The deflection of beam '*B*' will be __________ as compared to beam '*A*'.- (A) One-fourth

- (B) One-half

- (C) Double

- (D) Four times

**6. In a simple bending theory, one of the assumptions is that the material of the beam is isotropic. This assumption means that the**

- (A) Normal
stress remains constant in all directions

- (B) Normal
stress varies linearly in the material

- (C) Elastic
constants are same in all the directions

- (D) Elastic
constants varies linearly in the material

**7. The maximum deflection of a fixed beam carrying a central point load lies at**

- (A) Fixed ends

- (B) Center of beam

- (C)

*l*/3 from fixed ends

- (D) None of
these

**8. The shear stress at the center of a circular shaft under torsion is**

- (A) Zero

- (B) Minimum

- (C) Maximum

- (D) Infinity

**9. A body is subjected to a direct tensile stress of 300 MPa in one plane accompanied by a simple shear stress of 200 MPa. The maximum normal stress will be**

- (A) -100 MPa

- (B) 250 MPa

- (C) 300 MPa

- (D) 400 MPa

**10. When a closely-coiled helical spring is subjected to an axial load, it is said to be under**

- (A) Bending

- (B) Shear

- (C) Torsion

- (D) Crushing

**11. In a beam where shear force changes sign, the bending moment will be**

- (A) Zero

- (B) Minimum

- (C) Maximum

- (D) Infinity

**12. The strength of the unriveted or solid plate per pitch length is**

- (A)

*d*

*.t.σ*

_{c}- (B)

*p*.

*t*.σ

*t*

- (C)

*(p - d) t.σ*

_{t}- (D)

*π*/2 ×

*d²*×

*τ*

**13. The tensile test is carried on __________ materials.**

- (A) Ductile

- (B) Brittle

- (C) Malleable

- (D) Plastic

**14. The bending moment diagram for a simply supported beam loaded in its center is**

- (A) A right
angled triangle

- (B) An isosceles
triangle

- (C) An
equilateral triangle

- (D) A rectangle

**15. A bar of length ‘**

*L’*meters extends by ‘*l’*mm under a tensile force of ‘*P’*. The strain produced in the bar is- (A)

*l*/

*L*

- (B) 0.1

*l*/

*L*

- (C) 0.01

*l*/

*L*

- (D) 0.001

*l*/

*L*

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