# Practice Test: Question Set - 10

**1. Young's modulus is defined as the ratio of**

- (A) Volumetric stress and
volumetric strain

- (B) Lateral stress and
lateral strain

- (C) Longitudinal stress
and longitudinal strain

- (D) Shear stress to shear
strain

**2. The layer at the center of gravity of the beam as shown in the below figure, will be**

- (A) In
tension

- (B) In
compression

- (C) Neither
in tension nor in compression

- (D) None
of these

**3. When a body is subjected to a direct tensile stress (σ**

_{x}) in one plane accompanied by a simple shear stress (τ*), the minimum normal stress is*_{xy}- (A)

*(σ*2

_{x}/*)*+

*(1/2)*×

*√(σ*+

_{x}²*4 τ²*

_{xy})- (B)

*(σ*2

_{x}/*) - (1/2)*×

*√(σ*+

_{x}²*4 τ²*

_{xy})- (C)

*(σ*2

_{x}/*)*+

*(1/2)*×

*√(σ*

_{x}² - 4 τ²_{xy})- (D)

*(1/2)*×

*√(σx²*+

*4 τ²*

_{xy})**4. Tensile strength of a material is obtained by dividing the maximum load during the test by the**

- (A) Area at the time of
fracture

- (B) Original cross-sectional area

- (C) Average of (A) and (B)

- (D) Minimum area after fracture

**5. The section modulus of a circular section about an axis through its C.G., is**

- (A) π

*d²*/4

- (B) π

*d²*/16

- (C) π

*d*/16

^{3}- (D) π

*d*/32

^{3}**6. If a part is constrained to move and heated, it will develop**

- (A) Principal stress

- (B) Tensile stress

- (C) Compressive stress

- (D) Shear stress

**7. The moment of resistance of a balanced reinforced concrete beam is based on the stresses in**

- (A) Steel only

- (B) Concrete
only

- (C) Steel
and concrete both

- (D) None of
these

**8. The property of a material by virtue of which it can be beaten or rolled into plates is called**

- (A) Malleability

- (B) Ductility

- (C) Plasticity

- (D) Elasticity

**9. In case of an under-reinforced beam, the depth of actual neutral axis is __________ that of the critical neutral axis.**

- (A) Same as

- (B) Less than

- (C) Greater than

- (D) None of
these

**10. The energy absorbed in a body, when it is strained within the elastic limits, is known as**

- (A) Strain energy

- (B) Resilience

- (C) Proof resilience

- (D) Modulus of resilience

**11. A simply supported beam with a gradually varying load from zero at ‘**

*B’*and ‘*w’*per unit length at ‘*A’*is shown in the below figure. The shear force at ‘*B’*is equal to- (A)

*wl*/6

- (B)

*wl*/3

- (C)

*wl*

- (D) 2

*wl*/3

**12. A fletched beam is used to**

- (A) Change
the shape of the beam

- (B) Effect
the saving in material

- (C) Equalize the strength in tension and compression

- (D) Increase
the cross-section of the beam

**13. Percentage reduction in area performing tensile test on cast iron may be of the order of**

- (A) 50%

- (B) 25%

- (C) 20%

- (D) 30%

**14. A beam is loaded as cantilever. If the load at the end is increased, the failure will occur**

- (A) In the middle

- (B) At the tip below the
load

- (C) At the support

- (D) Anywhere

**15. The assumption made in Euler's column theory is that**

- (A) The
failure of column occurs due to buckling alone

- (B) The
length of column is very large as compared to its cross-sectional dimensions

- (C) The
column material obeys Hooke's law

- (D) All
of the above

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