# Practice Test: Question Set - 07

**1. The percentage reduction in area of a cast iron specimen during tensile test would be of the order of**

- (A) More than 50%

- (B) 25-50%

- (C) 10-25%

- (D) Negligible

**2. The deformation of a bar under its own weight is _________ the deformation, if the same body is subjected to a direct load equal to weight of the body.**

- (A) Equal to

- (B) Half

- (C) Double

- (D) Quadruple

**3. The ratio of maximum shear stress developed in a rectangular beam and a circular beam of the same cross-sectional area is**

- (A) 2/3

- (B) 3/4

- (C) 1

- (D) 9/8

**4. Formula based on IS codes is based on**

- (A) Straight
line formula

- (B) Euler’s
formula

- (C) Rankine’s formula

- (D) Secant
formula

**5. Resilience of a material is considered when it is subjected to**

- (A) Frequent heat
treatment

- (B) Fatigue

- (C) Creep

- (D) Shock loading

**6. The buckling load for a given column depends upon**

- (A) Area
of cross-section of the column

- (B) Length
and least radius of gyration of the column

- (C) Modulus
of elasticity for the material of the column

- (D) All
of the above

**7. The shear force at the center of a simply supported beam with a gradually varying load from zero at both ends to**

*w*per meter at the center, is- (A) Zero

- (B)

*wl*/4

- (C)

*wl*/2

- (D)

*wl²*/2

**8. A riveted joint in which the number otrivets decrease from innermost to outer most rows is called**

- (A) Chain riveted joint

- (B) Diamond riveted joint

- (C) Crisscross riveted
joint

- (D) Zigzag riveted joint

**9. A closely-coiled helical spring is cut into two halves. The stiffness of the resulting spring will be**

- (A) Same

- (B) Double

- (C) Half

- (D) One-fourth

**10. The torsional rigidity of a shaft is expressed by the**

- (A) Maximum torque it can
transmit

- (B) Number of cycles it
undergoes before failure

- (C) Elastic limit up to
which it resists torsion, shear and bending stresses

- (D) Torque required to
produce a twist of one radian per unit length of shaft

**11. The limit of eccentricity for no tensile conditions for a column of circular section of diameter (**

*d*) is- (A)

*d*/4

- (B)

*d*/8

- (C)

*d*/12

- (D)

*d*/16

**12. The property of a material by virtue of which a body returns to its original, shape after removal of the load is called**

- (A) Plasticity

- (B) Elasticity

- (C) Ductility

- (D) Malleability

**13. The state of stress at a point in a loaded member is shown in the below figure. The magnitude of maximum shear stress is**

- (A) 10 MPa

- (B) 30 MPa

- (C) 50 MPa

- (D) 100 MPa

**14. For a beam, as shown in the below figure, the deflection at**

*C*is (where*E*= Young's modulus for the beam material, and*I*= Moment of inertia of the beam section.)- (A)

*Wl*48

^{3}/*EI*

- (B)

*Wa²b²/*3

*EIl*

- (C)

*[Wa/(a√3) x EIl]*x

*(l² - a²)*

^{3/2}- (D) 5

*Wl*384

^{3}/*EI*

**15. A concentrated load is one which**

- (A) Acts
at a point on a beam

- (B) Spreads
non-uniformly over the whole length of a beam

- (C) Spreads
uniformly over the whole length of a beam

- (D) Varies
uniformly over the whole length of a beam

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