# Practice Test: Question Set - 20

**1. When the shear force diagram is a parabolic curve between two points, it indicates that there is a**

- (A) Point
load at the two points

- (B) No
loading between the two points

- (C) Uniformly
distributed load between the two points

- (D) Uniformly
varying load between the two points

**2. In order to avoid sliding of masonry dam, the force of friction between the dam and soil should be at least __________ the total water pressure per meter length.**

- (A) Equal to

- (B) 1.5 times

- (C) Double

- (D) 2.5 times

**3. The design of thin cylindrical shells is based on**

- (A) Hoop stress

- (B) Longitudinal
stress

- (C) Arithmetic
mean of the hoop and the longitudinal stress

- (D) Geometric
mean of the hoop and longitudinal stress

**4. A body is subjected to a tensile stress of 1200 MPa on one plane and another tensile stress of 600 MPa on a plane at right angles to the former. It is also subjected to a shear stress of 400 MPa on the same planes. The minimum normal stress will be**

- (A) 400 MPa

- (B) 500 MPa

- (C) 900 MPa

- (D) 1400 MPa

**5. In the below figure, the point**

*C*represents- (A) Elastic
limit

- (B) Upper yield
point

- (C) Lower yield
point

- (D) Breaking
point

**6. If the section modulus of a beam is increased, the bending stress in the beam will**

- (A) Not change

- (B) Increase

- (C) Decrease

- (D) None of
these

**7. In the below figure, the point**

*E*represents.- (A) The
maximum stress

- (B) The
minimum stress

- (C) No
stress

- (D) None
of these

**8. The maximum deflection of a cantilever beam of length ‘**

*l’*with a point load ‘*W’*at the free end is- (A)

*Wl*

^{3}/3EI- (B)

*Wl*

^{3}/8EI- (C)

*Wl*

^{3}/16EI- (D)

*Wl*

^{3}/48EI**9. The strength of a riveted joint is equal to the**

- (A) Pull
required to tear off the plate per pitch length (

*P*)

_{t}- (B) Pull
required to shear off the rivet per pitch length (

*P*)

_{s}- (C) Pull
required to crush the rivet per pitch length (

*P*)

_{c}- (D) Minimum
value of

*P*,

_{t}*P*or

_{s}*P*

_{c}**10. The torsional rigidity of a shaft is given by**

- (A)

*T*/

*J*

- (B)

*T*/

*θ*

- (C)

*T*/

*r*

- (D)

*T*/

*G*

**11. A localized compressive stress at the area of contact between two members is known as**

- (A) Tensile
stress

- (B) Bending
stress

- (C) Crushing
stress

- (D) Shear stress

**12. The product of Young's modulus (**

*E*) and moment of inertia (*I*) is known as- (A) Modulus of
rigidity

- (B) Bulk modulus

- (C) Flexural
rigidity

- (D) Torsional
rigidity

**13. A body is subjected to a direct tensile stress (σ) in one plane. The shear stress is maximum at a section inclined at __________ to the normal of the section.**

- (A) 45° and 90°

- (B) 45° and 135°

- (C) 60° and 150°

- (D) 30° and 135°

**14. Two solid shafts '**

*A*' and '*B*' are made of the same material. The shaft '*A*' is of 50 mm diameter and shaft '*B*' is of 100 mm diameter. The strength of shaft '*B*' is _________ as that of shaft*A*.- (A) One-half

- (B) Double

- (C) Four times

- (D) Eight times

**15. For a given stress, the ratio of moment of resistance of a beam of square cross-section when placed with its two sides horizontal to the moment of resistance with its diagonal horizontal, is**

- (A) 1/2

- (B) 1

- (C) 1/√2

- (D) √2

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