# Practice Test: Question Set - 18

**1. When a body is subjected to two equal and opposite forces, acting tangentially across the resisting section, as a result of which the body tends to shear off across the section, the stress and strain induced is**

- (A) Tensile
stress, tensile strain

- (B) Compressive
stress, compressive strain

- (C) Shear
stress, tensile strain

- (D) Shear
stress, shear strain

**2. The given figure shows the Mohr's circle of stress for two unequal and like principal stresses (σ**

_{x}*and σ*_{y}) acting at a body across two mutually perpendicular planes. The tangential stress is given by- (A)

*OC*

- (B)

*OP*

- (C)

*OQ*

- (D)

*PQ*

**3. The strain energy stored in a hollow circular shaft of outer diameter (**

*D*) and inner diameter (*d*) subjected to shear stress is- (A)

*(τ²/2C) (D² - d²/D)*× Volume of shaft

- (B)

*(τ²/2C) (D² + d²/D)*× Volume of shaft

- (C)

*(τ²/4C) (D² - d²/D)*× Volume of shaft

- (D)

*(τ²/4C) (D² + d²/D)*× Volume of shaft

**4. The center to center distance, between two consecutive rivets in a row, is called**

- (A) Margin

- (B) Pitch

- (C) Back pitch

- (D) Diagonal
pitch

**5. Two shafts '**

*A*' and '*B*' are made of same material. The shaft '*A*' is of diameter*D*and shaft '*B*' is of diameter*D*/2. The strength of shaft '*B*' is _________ as that of shaft '*A*'- (A) One-eighth

- (B) One-fourth

- (C) One-half

- (D) Four
times

**6. According to Unwin's formula, the relation between diameter of rivet hole (**

*d*) and thickness of plate (*t*) is given by (where*d*and*t*are in mm)- (A)

*d*=

*t*

- (B)

*d*= 1.6

*t*

- (C)

*d*= 2

*t*

- (D)

*d*= 6

*t*

**7. A tensile test is performed on a round bar. After fracture, it has been found that the diameter remains approximately same at fracture. The material under test was**

- (A) Mild
steel

- (B) Cast iron

- (C) Glass

- (D) Copper

**8. A rectangular beam of length**

*l*supported at its two ends carries a central point load*W*. The maximum deflection occurs- (A) At the ends

- (B) At

*l*/3 from both ends

- (C) At the
center

- (D) None of
these

**9. The ratio of the lateral strain to the linear strain is called**

- (A) Modulus
of elasticity

- (B) Modulus of
rigidity

- (C) Bulk modulus

- (D) Poisson's
ratio

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

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

- (B)

*wl*/4

- (C)

*wl*/2

- (D)

*wl*

**11. In a simple bending of beams, the stress in the beam varies**

- (A) Linearly

- (B) Parabolically

- (C) Hyperbolically

- (D) Elliptically

**12. The shear force at a point on a beam is the algebraic __________ of all the forces on either side of the point.**

- (A) Sum

- (B) Difference

- (C) Multiplication

- (D) Division

**13. When a cantilever beam is loaded at its free end, the maximum compressive stress shall develop at**

- (A) Bottom fibre

- (B) Top fibre

- (C) Neutral axis

- (D) Center of
gravity

**14. The total strain energy stored in a body is termed as**

- (A) Resilience

- (B) Proof
resilience

- (C) Impact
energy

- (D) Modulus
of resilience

**15. When a body is subjected to biaxial stress i.e. direct stresses (σ**

_{x}) and (σ_{y}) in two mutually perpendicular planes accompanied by a simple shear stress (τ_{xy}), then maximum shear stress is- (A)

*(1/2) × √[(σ*

_{x}- σ_{y})² + 4 τ²_{xy}]- (B)

*(1/2) × √[(σ*

_{x}+ σ_{y})² + 4 τ²_{xy}]- (C)

*√[(σ*

_{x}- σ_{y})² + τ²_{xy}]- (D)

*√[(σ*

_{x}+ σ_{y})² + τ²_{xy}]**View All Answers**

**Next Tests:**